ingest cdrApp 2018-06-13T21:01:52.294Z 51cd2fe2-3fd7-401f-a923-a97bc3db68a2 modifyDatastreamByValue RELS-EXT fedoraAdmin 2018-06-13T22:30:31.068Z Setting exclusive relation addDatastream MD_TECHNICAL fedoraAdmin 2018-06-13T22:30:31.687Z Adding technical metadata derived by FITS addDatastream MD_FULL_TEXT fedoraAdmin 2018-06-13T22:30:54.613Z Adding full text metadata extracted by Apache Tika modifyDatastreamByValue RELS-EXT fedoraAdmin 2018-06-13T22:31:06.062Z Setting exclusive relation modifyDatastreamByValue MD_DESCRIPTIVE cdrApp 2018-07-11T00:47:29.760Z modifyDatastreamByValue MD_DESCRIPTIVE cdrApp 2018-07-17T20:45:37.145Z modifyDatastreamByValue MD_DESCRIPTIVE cdrApp 2018-08-08T20:12:50.748Z modifyDatastreamByValue MD_DESCRIPTIVE cdrApp 2018-08-15T17:21:44.777Z modifyDatastreamByValue MD_DESCRIPTIVE cdrApp 2018-08-16T20:23:58.985Z modifyDatastreamByValue MD_DESCRIPTIVE cdrApp 2018-09-21T17:48:34.047Z modifyDatastreamByValue MD_DESCRIPTIVE cdrApp 2018-09-26T20:59:01.598Z modifyDatastreamByValue MD_DESCRIPTIVE cdrApp 2018-10-11T21:38:08.505Z modifyDatastreamByValue MD_DESCRIPTIVE cdrApp 2019-03-20T15:01:34.513Z Robert Call Author Department of Physics and Astronomy College of Arts and Sciences INVESTIGATIONS OF ANNEALING EFFECTS ON STRONTIUM TITANATE ELECTRODES FOR APPLICATION AS BARE AND DYE-SENSITIZED PHOTOANODES IN PHOTOELECTROCHEMICAL CELLS Photoelectrochemical cells (PECs) that catalyze the water-splitting reaction with solar energy have been proposed as an alternative to electrolysis of water. The electrodes for these cells must have particular qualities with regards to electrochemical stability, dielectric properties, optical bandgap, and position of band edges to create a functioning PEC. Finding a material that satisfies all of these requirements is challenge. Here we consider strontium titanate as a photoanode for these cells and attempt to modify these electrodes to have optimum properties for this application. Strontium titanate has been considered as a photoelectrode for PECs and dyesensitized solar cells because of its electrochemical stability. Its resistivity, band gap, and band edge positions are not ideal for these devices leading many investigators to attempt a wide variety of modifications to improve their performance. One common alteration is to anneal strontium titanate electrodes in a variety of atmospheres and temperatures. A significant amount of work has studied the effects of anneals on strontium titanate but a systematic study on how changes in annealing conditions effect the photoelectrochemical performance of bare and dye-sensitized strontium titanate photoelectrodes is absent from the literature. In this work the effects of annealing atmosphere and temperature on strontium titante film electrodes are evaluated in the context of their application as PEC and dyesensitized PEC photoanodes. Strontium titante films were fabricated using pulsed laser deposition. Spectroscopic techniques used for this study include x-ray diffraction, x-ray photoelectron spectroscopy, UV-Vis absorption, and spectroscopic ellipsometry. These techniques are combined with a variety of electrochemical measurements to evaluate the photoanodes. Electrochemical measurements included controlled potential techniques, transient absorption spectroscopy, Mott-Schottky analysis, and electrochemical impedance spectroscopy. A spectroelectrochemical technique for measuring density of states was attempted but did not yield significant results. A rotating ring-disk electrode setup was used to evaluate the faradaic efficiency of the electrode with the best performance. Winter 2018 2018 Physics Materials Science Photoelectrochemistry, Strontium Titanate eng Doctor of Philosophy Dissertation University of North Carolina at Chapel Hill Graduate School Degree granting institution Physics Rene Lopez Thesis advisor Gerald Cecil Thesis advisor Thomas Meyer Thesis advisor Lu-Chang Qin Thesis advisor Sean Washburn Thesis advisor text Robert Call Author Department of Physics and Astronomy College of Arts and Sciences INVESTIGATIONS OF ANNEALING EFFECTS ON STRONTIUM TITANATE ELECTRODES FOR APPLICATION AS BARE AND DYE-SENSITIZED PHOTOANODES IN PHOTOELECTROCHEMICAL CELLS Photoelectrochemical cells (PECs) that catalyze the water-splitting reaction with solar energy have been proposed as an alternative to electrolysis of water. The electrodes for these cells must have particular qualities with regards to electrochemical stability, dielectric properties, optical bandgap, and position of band edges to create a functioning PEC. Finding a material that satisfies all of these requirements is challenge. Here we consider strontium titanate as a photoanode for these cells and attempt to modify these electrodes to have optimum properties for this application. Strontium titanate has been considered as a photoelectrode for PECs and dyesensitized solar cells because of its electrochemical stability. Its resistivity, band gap, and band edge positions are not ideal for these devices leading many investigators to attempt a wide variety of modifications to improve their performance. One common alteration is to anneal strontium titanate electrodes in a variety of atmospheres and temperatures. A significant amount of work has studied the effects of anneals on strontium titanate but a systematic study on how changes in annealing conditions effect the photoelectrochemical performance of bare and dye-sensitized strontium titanate photoelectrodes is absent from the literature. In this work the effects of annealing atmosphere and temperature on strontium titante film electrodes are evaluated in the context of their application as PEC and dyesensitized PEC photoanodes. Strontium titante films were fabricated using pulsed laser deposition. Spectroscopic techniques used for this study include x-ray diffraction, x-ray photoelectron spectroscopy, UV-Vis absorption, and spectroscopic ellipsometry. These techniques are combined with a variety of electrochemical measurements to evaluate the photoanodes. Electrochemical measurements included controlled potential techniques, transient absorption spectroscopy, Mott-Schottky analysis, and electrochemical impedance spectroscopy. A spectroelectrochemical technique for measuring density of states was attempted but did not yield significant results. A rotating ring-disk electrode setup was used to evaluate the faradaic efficiency of the electrode with the best performance. Winter 2018 2018 Physics Materials Science Photoelectrochemistry, Strontium Titanate eng Doctor of Philosophy Dissertation University of North Carolina at Chapel Hill Graduate School Degree granting institution Physics Rene Lopez Thesis advisor Gerald Cecil Thesis advisor Thomas Meyer Thesis advisor Lu-Chang Qin Thesis advisor Sean Washburn Thesis advisor text Robert Call Author Department of Physics and Astronomy College of Arts and Sciences INVESTIGATIONS OF ANNEALING EFFECTS ON STRONTIUM TITANATE ELECTRODES FOR APPLICATION AS BARE AND DYE-SENSITIZED PHOTOANODES IN PHOTOELECTROCHEMICAL CELLS Photoelectrochemical cells (PECs) that catalyze the water-splitting reaction with solar energy have been proposed as an alternative to electrolysis of water. The electrodes for these cells must have particular qualities with regards to electrochemical stability, dielectric properties, optical bandgap, and position of band edges to create a functioning PEC. Finding a material that satisfies all of these requirements is challenge. Here we consider strontium titanate as a photoanode for these cells and attempt to modify these electrodes to have optimum properties for this application. Strontium titanate has been considered as a photoelectrode for PECs and dyesensitized solar cells because of its electrochemical stability. Its resistivity, band gap, and band edge positions are not ideal for these devices leading many investigators to attempt a wide variety of modifications to improve their performance. One common alteration is to anneal strontium titanate electrodes in a variety of atmospheres and temperatures. A significant amount of work has studied the effects of anneals on strontium titanate but a systematic study on how changes in annealing conditions effect the photoelectrochemical performance of bare and dye-sensitized strontium titanate photoelectrodes is absent from the literature. In this work the effects of annealing atmosphere and temperature on strontium titante film electrodes are evaluated in the context of their application as PEC and dyesensitized PEC photoanodes. Strontium titante films were fabricated using pulsed laser deposition. Spectroscopic techniques used for this study include x-ray diffraction, x-ray photoelectron spectroscopy, UV-Vis absorption, and spectroscopic ellipsometry. These techniques are combined with a variety of electrochemical measurements to evaluate the photoanodes. Electrochemical measurements included controlled potential techniques, transient absorption spectroscopy, Mott-Schottky analysis, and electrochemical impedance spectroscopy. A spectroelectrochemical technique for measuring density of states was attempted but did not yield significant results. A rotating ring-disk electrode setup was used to evaluate the faradaic efficiency of the electrode with the best performance. Winter 2018 2018 Physics Materials Science Photoelectrochemistry, Strontium Titanate eng Doctor of Philosophy Dissertation University of North Carolina at Chapel Hill Graduate School Degree granting institution Physics Rene Lopez Thesis advisor Gerald Cecil Thesis advisor Thomas Meyer Thesis advisor Lu-Chang Qin Thesis advisor Sean Washburn Thesis advisor text Robert Call Author Department of Physics and Astronomy College of Arts and Sciences INVESTIGATIONS OF ANNEALING EFFECTS ON STRONTIUM TITANATE ELECTRODES FOR APPLICATION AS BARE AND DYE-SENSITIZED PHOTOANODES IN PHOTOELECTROCHEMICAL CELLS Photoelectrochemical cells (PECs) that catalyze the water-splitting reaction with solar energy have been proposed as an alternative to electrolysis of water. The electrodes for these cells must have particular qualities with regards to electrochemical stability, dielectric properties, optical bandgap, and position of band edges to create a functioning PEC. Finding a material that satisfies all of these requirements is challenge. Here we consider strontium titanate as a photoanode for these cells and attempt to modify these electrodes to have optimum properties for this application. Strontium titanate has been considered as a photoelectrode for PECs and dyesensitized solar cells because of its electrochemical stability. Its resistivity, band gap, and band edge positions are not ideal for these devices leading many investigators to attempt a wide variety of modifications to improve their performance. One common alteration is to anneal strontium titanate electrodes in a variety of atmospheres and temperatures. A significant amount of work has studied the effects of anneals on strontium titanate but a systematic study on how changes in annealing conditions effect the photoelectrochemical performance of bare and dye-sensitized strontium titanate photoelectrodes is absent from the literature. In this work the effects of annealing atmosphere and temperature on strontium titante film electrodes are evaluated in the context of their application as PEC and dyesensitized PEC photoanodes. Strontium titante films were fabricated using pulsed laser deposition. Spectroscopic techniques used for this study include x-ray diffraction, x-ray photoelectron spectroscopy, UV-Vis absorption, and spectroscopic ellipsometry. These techniques are combined with a variety of electrochemical measurements to evaluate the photoanodes. Electrochemical measurements included controlled potential techniques, transient absorption spectroscopy, Mott-Schottky analysis, and electrochemical impedance spectroscopy. A spectroelectrochemical technique for measuring density of states was attempted but did not yield significant results. A rotating ring-disk electrode setup was used to evaluate the faradaic efficiency of the electrode with the best performance. Winter 2018 2018 Physics Materials Science Photoelectrochemistry, Strontium Titanate eng Doctor of Philosophy Dissertation University of North Carolina at Chapel Hill Graduate School Degree granting institution Physics Rene Lopez Thesis advisor Gerald Cecil Thesis advisor Thomas Meyer Thesis advisor Lu-Chang Qin Thesis advisor Sean Washburn Thesis advisor text Robert Call Author Department of Physics and Astronomy College of Arts and Sciences INVESTIGATIONS OF ANNEALING EFFECTS ON STRONTIUM TITANATE ELECTRODES FOR APPLICATION AS BARE AND DYE-SENSITIZED PHOTOANODES IN PHOTOELECTROCHEMICAL CELLS Photoelectrochemical cells (PECs) that catalyze the water-splitting reaction with solar energy have been proposed as an alternative to electrolysis of water. The electrodes for these cells must have particular qualities with regards to electrochemical stability, dielectric properties, optical bandgap, and position of band edges to create a functioning PEC. Finding a material that satisfies all of these requirements is challenge. Here we consider strontium titanate as a photoanode for these cells and attempt to modify these electrodes to have optimum properties for this application. Strontium titanate has been considered as a photoelectrode for PECs and dyesensitized solar cells because of its electrochemical stability. Its resistivity, band gap, and band edge positions are not ideal for these devices leading many investigators to attempt a wide variety of modifications to improve their performance. One common alteration is to anneal strontium titanate electrodes in a variety of atmospheres and temperatures. A significant amount of work has studied the effects of anneals on strontium titanate but a systematic study on how changes in annealing conditions effect the photoelectrochemical performance of bare and dye-sensitized strontium titanate photoelectrodes is absent from the literature. In this work the effects of annealing atmosphere and temperature on strontium titante film electrodes are evaluated in the context of their application as PEC and dyesensitized PEC photoanodes. Strontium titante films were fabricated using pulsed laser deposition. Spectroscopic techniques used for this study include x-ray diffraction, x-ray photoelectron spectroscopy, UV-Vis absorption, and spectroscopic ellipsometry. These techniques are combined with a variety of electrochemical measurements to evaluate the photoanodes. Electrochemical measurements included controlled potential techniques, transient absorption spectroscopy, Mott-Schottky analysis, and electrochemical impedance spectroscopy. A spectroelectrochemical technique for measuring density of states was attempted but did not yield significant results. A rotating ring-disk electrode setup was used to evaluate the faradaic efficiency of the electrode with the best performance. Winter 2018 2018 Physics Materials Science Photoelectrochemistry, Strontium Titanate eng Doctor of Philosophy Dissertation Physics Rene Lopez Thesis advisor Gerald Cecil Thesis advisor Thomas Meyer Thesis advisor Lu-Chang Qin Thesis advisor Sean Washburn Thesis advisor text University of North Carolina at Chapel Hill Degree granting institution Robert Call Author Department of Physics and Astronomy College of Arts and Sciences INVESTIGATIONS OF ANNEALING EFFECTS ON STRONTIUM TITANATE ELECTRODES FOR APPLICATION AS BARE AND DYE-SENSITIZED PHOTOANODES IN PHOTOELECTROCHEMICAL CELLS Photoelectrochemical cells (PECs) that catalyze the water-splitting reaction with solar energy have been proposed as an alternative to electrolysis of water. The electrodes for these cells must have particular qualities with regards to electrochemical stability, dielectric properties, optical bandgap, and position of band edges to create a functioning PEC. Finding a material that satisfies all of these requirements is challenge. Here we consider strontium titanate as a photoanode for these cells and attempt to modify these electrodes to have optimum properties for this application. Strontium titanate has been considered as a photoelectrode for PECs and dyesensitized solar cells because of its electrochemical stability. Its resistivity, band gap, and band edge positions are not ideal for these devices leading many investigators to attempt a wide variety of modifications to improve their performance. One common alteration is to anneal strontium titanate electrodes in a variety of atmospheres and temperatures. A significant amount of work has studied the effects of anneals on strontium titanate but a systematic study on how changes in annealing conditions effect the photoelectrochemical performance of bare and dye-sensitized strontium titanate photoelectrodes is absent from the literature. In this work the effects of annealing atmosphere and temperature on strontium titante film electrodes are evaluated in the context of their application as PEC and dyesensitized PEC photoanodes. Strontium titante films were fabricated using pulsed laser deposition. Spectroscopic techniques used for this study include x-ray diffraction, x-ray photoelectron spectroscopy, UV-Vis absorption, and spectroscopic ellipsometry. These techniques are combined with a variety of electrochemical measurements to evaluate the photoanodes. Electrochemical measurements included controlled potential techniques, transient absorption spectroscopy, Mott-Schottky analysis, and electrochemical impedance spectroscopy. A spectroelectrochemical technique for measuring density of states was attempted but did not yield significant results. A rotating ring-disk electrode setup was used to evaluate the faradaic efficiency of the electrode with the best performance. Winter 2018 2018 Physics Materials Science Photoelectrochemistry, Strontium Titanate eng Doctor of Philosophy Dissertation University of North Carolina at Chapel Hill Graduate School Degree granting institution Physics Rene Lopez Thesis advisor Gerald Cecil Thesis advisor Thomas Meyer Thesis advisor Lu-Chang Qin Thesis advisor Sean Washburn Thesis advisor text Robert Call Author Department of Physics and Astronomy College of Arts and Sciences INVESTIGATIONS OF ANNEALING EFFECTS ON STRONTIUM TITANATE ELECTRODES FOR APPLICATION AS BARE AND DYE-SENSITIZED PHOTOANODES IN PHOTOELECTROCHEMICAL CELLS Photoelectrochemical cells (PECs) that catalyze the water-splitting reaction with solar energy have been proposed as an alternative to electrolysis of water. The electrodes for these cells must have particular qualities with regards to electrochemical stability, dielectric properties, optical bandgap, and position of band edges to create a functioning PEC. Finding a material that satisfies all of these requirements is challenge. Here we consider strontium titanate as a photoanode for these cells and attempt to modify these electrodes to have optimum properties for this application. Strontium titanate has been considered as a photoelectrode for PECs and dyesensitized solar cells because of its electrochemical stability. Its resistivity, band gap, and band edge positions are not ideal for these devices leading many investigators to attempt a wide variety of modifications to improve their performance. One common alteration is to anneal strontium titanate electrodes in a variety of atmospheres and temperatures. A significant amount of work has studied the effects of anneals on strontium titanate but a systematic study on how changes in annealing conditions effect the photoelectrochemical performance of bare and dye-sensitized strontium titanate photoelectrodes is absent from the literature. In this work the effects of annealing atmosphere and temperature on strontium titante film electrodes are evaluated in the context of their application as PEC and dyesensitized PEC photoanodes. Strontium titante films were fabricated using pulsed laser deposition. Spectroscopic techniques used for this study include x-ray diffraction, x-ray photoelectron spectroscopy, UV-Vis absorption, and spectroscopic ellipsometry. These techniques are combined with a variety of electrochemical measurements to evaluate the photoanodes. Electrochemical measurements included controlled potential techniques, transient absorption spectroscopy, Mott-Schottky analysis, and electrochemical impedance spectroscopy. A spectroelectrochemical technique for measuring density of states was attempted but did not yield significant results. A rotating ring-disk electrode setup was used to evaluate the faradaic efficiency of the electrode with the best performance. Winter 2018 2018 Physics Materials Science Photoelectrochemistry, Strontium Titanate eng Doctor of Philosophy Dissertation University of North Carolina at Chapel Hill Graduate School Degree granting institution Physics Rene Lopez Thesis advisor Gerald Cecil Thesis advisor Thomas Meyer Thesis advisor Lu-Chang Qin Thesis advisor Sean Washburn Thesis advisor text Robert Call Creator Department of Physics and Astronomy College of Arts and Sciences INVESTIGATIONS OF ANNEALING EFFECTS ON STRONTIUM TITANATE ELECTRODES FOR APPLICATION AS BARE AND DYE-SENSITIZED PHOTOANODES IN PHOTOELECTROCHEMICAL CELLS Photoelectrochemical cells (PECs) that catalyze the water-splitting reaction with solar energy have been proposed as an alternative to electrolysis of water. The electrodes for these cells must have particular qualities with regards to electrochemical stability, dielectric properties, optical bandgap, and position of band edges to create a functioning PEC. Finding a material that satisfies all of these requirements is challenge. Here we consider strontium titanate as a photoanode for these cells and attempt to modify these electrodes to have optimum properties for this application. Strontium titanate has been considered as a photoelectrode for PECs and dyesensitized solar cells because of its electrochemical stability. Its resistivity, band gap, and band edge positions are not ideal for these devices leading many investigators to attempt a wide variety of modifications to improve their performance. One common alteration is to anneal strontium titanate electrodes in a variety of atmospheres and temperatures. A significant amount of work has studied the effects of anneals on strontium titanate but a systematic study on how changes in annealing conditions effect the photoelectrochemical performance of bare and dye-sensitized strontium titanate photoelectrodes is absent from the literature. In this work the effects of annealing atmosphere and temperature on strontium titante film electrodes are evaluated in the context of their application as PEC and dyesensitized PEC photoanodes. Strontium titante films were fabricated using pulsed laser deposition. Spectroscopic techniques used for this study include x-ray diffraction, x-ray photoelectron spectroscopy, UV-Vis absorption, and spectroscopic ellipsometry. These techniques are combined with a variety of electrochemical measurements to evaluate the photoanodes. Electrochemical measurements included controlled potential techniques, transient absorption spectroscopy, Mott-Schottky analysis, and electrochemical impedance spectroscopy. A spectroelectrochemical technique for measuring density of states was attempted but did not yield significant results. A rotating ring-disk electrode setup was used to evaluate the faradaic efficiency of the electrode with the best performance. Physics Materials Science Photoelectrochemistry; Strontium Titanate eng Doctor of Philosophy Dissertation University of North Carolina at Chapel Hill Graduate School Degree granting institution Physics Rene Lopez Thesis advisor Gerald Cecil Thesis advisor Thomas Meyer Thesis advisor Lu-Chang Qin Thesis advisor Sean Washburn Thesis advisor text 2018 2018-12 Robert Call Author Department of Physics and Astronomy College of Arts and Sciences INVESTIGATIONS OF ANNEALING EFFECTS ON STRONTIUM TITANATE ELECTRODES FOR APPLICATION AS BARE AND DYE-SENSITIZED PHOTOANODES IN PHOTOELECTROCHEMICAL CELLS Photoelectrochemical cells (PECs) that catalyze the water-splitting reaction with solar energy have been proposed as an alternative to electrolysis of water. The electrodes for these cells must have particular qualities with regards to electrochemical stability, dielectric properties, optical bandgap, and position of band edges to create a functioning PEC. Finding a material that satisfies all of these requirements is challenge. Here we consider strontium titanate as a photoanode for these cells and attempt to modify these electrodes to have optimum properties for this application. Strontium titanate has been considered as a photoelectrode for PECs and dyesensitized solar cells because of its electrochemical stability. Its resistivity, band gap, and band edge positions are not ideal for these devices leading many investigators to attempt a wide variety of modifications to improve their performance. One common alteration is to anneal strontium titanate electrodes in a variety of atmospheres and temperatures. A significant amount of work has studied the effects of anneals on strontium titanate but a systematic study on how changes in annealing conditions effect the photoelectrochemical performance of bare and dye-sensitized strontium titanate photoelectrodes is absent from the literature. In this work the effects of annealing atmosphere and temperature on strontium titante film electrodes are evaluated in the context of their application as PEC and dyesensitized PEC photoanodes. Strontium titante films were fabricated using pulsed laser deposition. Spectroscopic techniques used for this study include x-ray diffraction, x-ray photoelectron spectroscopy, UV-Vis absorption, and spectroscopic ellipsometry. These techniques are combined with a variety of electrochemical measurements to evaluate the photoanodes. Electrochemical measurements included controlled potential techniques, transient absorption spectroscopy, Mott-Schottky analysis, and electrochemical impedance spectroscopy. A spectroelectrochemical technique for measuring density of states was attempted but did not yield significant results. A rotating ring-disk electrode setup was used to evaluate the faradaic efficiency of the electrode with the best performance. Winter 2018 2018 Physics Materials Science Photoelectrochemistry, Strontium Titanate eng Doctor of Philosophy Dissertation University of North Carolina at Chapel Hill Graduate School Degree granting institution Physics Rene Lopez Thesis advisor Gerald Cecil Thesis advisor Thomas Meyer Thesis advisor Lu-Chang Qin Thesis advisor Sean Washburn Thesis advisor text Robert Call Creator Department of Physics and Astronomy College of Arts and Sciences Photoelectrochemical cells (PECs) that catalyze the water-splitting reaction with solar energy have been proposed as an alternative to electrolysis of water. The electrodes for these cells must have particular qualities with regards to electrochemical stability, dielectric properties, optical bandgap, and position of band edges to create a functioning PEC. Finding a material that satisfies all of these requirements is challenge. Here we consider strontium titanate as a photoanode for these cells and attempt to modify these electrodes to have optimum properties for this application. Strontium titanate has been considered as a photoelectrode for PECs and dyesensitized solar cells because of its electrochemical stability. Its resistivity, band gap, and band edge positions are not ideal for these devices leading many investigators to attempt a wide variety of modifications to improve their performance. One common alteration is to anneal strontium titanate electrodes in a variety of atmospheres and temperatures. A significant amount of work has studied the effects of anneals on strontium titanate but a systematic study on how changes in annealing conditions effect the photoelectrochemical performance of bare and dye-sensitized strontium titanate photoelectrodes is absent from the literature. In this work the effects of annealing atmosphere and temperature on strontium titante film electrodes are evaluated in the context of their application as PEC and dyesensitized PEC photoanodes. Strontium titante films were fabricated using pulsed laser deposition. Spectroscopic techniques used for this study include x-ray diffraction, x-ray photoelectron spectroscopy, UV-Vis absorption, and spectroscopic ellipsometry. These techniques are combined with a variety of electrochemical measurements to evaluate the photoanodes. Electrochemical measurements included controlled potential techniques, transient absorption spectroscopy, Mott-Schottky analysis, and electrochemical impedance spectroscopy. A spectroelectrochemical technique for measuring density of states was attempted but did not yield significant results. A rotating ring-disk electrode setup was used to evaluate the faradaic efficiency of the electrode with the best performance. 2018-12 2018 Physics Materials Science Photoelectrochemistry; Strontium Titanate eng Doctor of Philosophy Dissertation University of North Carolina at Chapel Hill Graduate School Degree granting institution Rene Lopez Thesis advisor Gerald Cecil Thesis advisor Thomas Meyer Thesis advisor Lu-Chang Qin Thesis advisor Sean Washburn Thesis advisor text Call_unc_0153D_17487.pdf uuid:625ca64e-46ae-4913-bf9c-f2986c57617c 2020-06-13T00:00:00 2018-01-17T16:19:52Z proquest application/pdf 6176242