Tailoring Crystallinity of BiVO4 Films for Water Splitting by Pulsed Laser Deposition

Cheng, Chu-Yu (2021) Tailoring Crystallinity of BiVO4 Films for Water Splitting by Pulsed Laser Deposition. Master's Thesis, University of Pittsburgh. (Unpublished)

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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Status:	Unpublished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:	Creators Email Pitt Username ORCID Cheng, Chu-Yu chc310@pitt.edu chc310 0000-0002-1286-2957
ETD Committee:	Title Member Email Address Pitt Username ORCID Committee Chair Lee, Jung-Kun jul37@pitt.edu jul37 Committee Member Wiezorek, Jörg wiezorek@pitt.edu wiezorek Committee Member Saidi, Wissam Abdo alsaidi@pitt.edu alsaidi Thesis Advisor Lee, Jung-Kun jul37@pitt.edu jul37
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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