Faculty Advisor or Committee Member

Pratap M. Rao, Advisor

Faculty Advisor or Committee Member

Richard D. Sisson Jr., Committee Member

Faculty Advisor or Committee Member

Yan Wang, Committee Member

Faculty Advisor or Committee Member

Lyubov Titova, Committee Member

Faculty Advisor or Committee Member

N. Aaron Deskins, Committee Member

Faculty Advisor or Committee Member

Danielle Cote , Committee Member

Identifier

etd-041619-150446

Abstract

Metal oxide materials could offer earth-abundant, non-toxic alternatives to existing lightabsorber materials in thin-film photovoltaic and photoelectrochemical cells. However, efficiency of these devices based on existing metal oxides is typically low due to poor material properties. In this research, novel Sb:SnO2 nanorod and nanotube electron collectors have been synthesized, investigated and were used to improve the photo-conversion efficiency of top-performing BiVO4 photoelectrochemical cell. The performance of Sb:SnO2/BiVO4 photoanode achieved a new record for the product of light absorption and charge separation efficiencies (ηabs × ηsep) of ~ 57.3% and 58.5% under front- and back-side illumination at 0.6 VRHE and Sb:SnO2/BiVO4 PV cell achieved 1.22% solar power conversion efficiency. In addition, a new promising metal oxide material (CuBiW2O8) has been synthesized and its optoelectronic properties have been investigated to make photovoltaic cell which has potential to achieve over 30% solar power conversion efficiency.

Publisher

Worcester Polytechnic Institute

Degree Name

PhD

Department

Materials Science & Engineering

Project Type

Dissertation

Date Accepted

2019-03-19

Accessibility

Restricted-WPI community only

Subjects

metal oxides, nanotechnology, photoelectrochemical water splitting

Available for download on Thursday, April 16, 2020

Share

COinS