The present work reports fabrication of vertically aligned CdS sensitized TiO2 nanorod arrays grown on transparent conducting oxide substrate with high transparency as a photoanode in photoelectrochemical cell for water splitting. To realize an unassisted water splitting system, the photoanode and dye-sensitized solar cell tandem structures are tried and their electrochemical behaviors are also investigated. The hydrothermally grown TiO2 nanorod arrays followed by CdS nanoparticle decoration can improve the light absorption of long wavelength light resulting in increased photocurrent density. Two different techniques (electrodeposition and spray pyrolysis deposition) of CdS nanoparticle sensitization are carried out and their water splitting behaviors in the tandem cell are compared.
Bibliographical noteFunding Information:
This work was supported by an NRF grants funded by the Korea Ministry of Education, Science and Technology (MEST) ( NRF-2009-C1AAA001-2009-0094157 , the NCRC program ( 2011-0006268 ) and the Hydrogen Energy R&D Center (21st Century Frontier R&D Program) ). This work was also partially supported by the New and Renewable Energy Program through the KETEP funded by the Ministry of Knowledge Economy (MKE) ( 008NPV08J010000 ).
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering