Enhanced photoelectrochemical performance of CdSe quantum dot sensitized SrTiO3

Autor:	Subhendu K. Panda, M. Eashwar, Gosipathala Sreedhar, Arumugam Sivanantham, S. Venkateshwaran
Rok vydání:	2015
Předmět:	Photocurrent Materials science Renewable Energy Sustainability and the Environment business.industry Band gap Heterojunction General Chemistry Quantum dot Water splitting Optoelectronics General Materials Science business Current density Photocatalytic water splitting Visible spectrum
Zdroj:	Journal of Materials Chemistry A. 3:13476-13482
ISSN:	2050-7496 2050-7488
DOI:	10.1039/c5ta00304k
Popis:	We report the design and characteristics of a novel CdSe quantum dot sensitized SrTiO3 as a photoanode for photoelectrochemical water splitting with strong absorption in the UV and visible light regions up to 607 nm and an enhanced photocatalytic water splitting activity. Our results demonstrate an increase of photocurrent density with a decrease of the band gap of CdSe QDs for the sensitized SrTiO3 electrodes. Combinations of CdSe QDs of different band gaps produce a current density of up to ∼5 mA cm−2 at 0 V and ∼18 mA cm−2 at 0.75 V vs. Ag/AgCl. In comparison to the bare SrTiO3 electrode, a two-time increase in the current density is noted for the CdSe QD sensitized SrTiO3 electrodes at 0.75 V vs. Ag/AgCl. Our results demonstrate for the first time the use of SrTiO3 perovskite sensitized with tuned band gap CdSe QD heterostructures as a photoelectrocatalyst for enhanced solar water splitting.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f0da99d085491c2d255af566f8158a57 https://doi.org/10.1039/c5ta00304k Zobrazit plný text záznamu