Cheng, Chu-Yu
(2021)
Tailoring Crystallinity of BiVO4 Films for Water Splitting by Pulsed Laser Deposition.
Master's Thesis, University of Pittsburgh.
(Unpublished)
Abstract
Bismuth vanadate (BiVO4) is one of the most popular candidates among materials for solar water splitting. In previous studies, typical BiVO4 films exhibit limitations due to poor charge carrier mobility. Recently, it has been reported that this drawback could be fixed with synthesis of BiVO4 films via pulsed laser deposition. In this thesis, the effect of temperature and substrate on the microstructure of BiVO4 films is studied. The thickness and crystallographic orientation could be controlled by executing the deposition under different conditions. BiVO4 films deposited at temperature higher than 500°C demonstrate gradual change in crystallographic orientation as temperature increases, showing certain level of preferred orientation comparing with those synthesized under room temperature. In addition, the films with higher tendency of preferred orientation also show higher photocurrent density during photoelectrochemical characterization.
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Details
Item Type: |
University of Pittsburgh ETD
|
Status: |
Unpublished |
Creators/Authors: |
|
ETD Committee: |
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Date: |
13 June 2021 |
Date Type: |
Publication |
Defense Date: |
29 March 2021 |
Approval Date: |
13 June 2021 |
Submission Date: |
7 April 2021 |
Access Restriction: |
No restriction; Release the ETD for access worldwide immediately. |
Number of Pages: |
57 |
Institution: |
University of Pittsburgh |
Schools and Programs: |
Swanson School of Engineering > Mechanical Engineering and Materials Science |
Degree: |
MSMSE - Master of Science in Materials Science and Engineering |
Thesis Type: |
Master's Thesis |
Refereed: |
Yes |
Uncontrolled Keywords: |
BiVO4, pulsed laser deposition, preferred orientation, photoelectrochemical cells |
Date Deposited: |
13 Jun 2021 18:46 |
Last Modified: |
13 Jun 2021 18:46 |
URI: |
http://d-scholarship.pitt.edu/id/eprint/40541 |
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