Journal
NANOSCALE
Volume 3, Issue 2, Pages 674-677Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0nr00591f
Keywords
-
Categories
Funding
- National Science Foundation of China [50872022, 60801002, 60971017]
- National Key Basic Research Program 973 [2010CB327705]
- Chinese 111 project [B07027]
- 863 Program of China [2007AA01Z303, 2008AA03A314]
- NSF Project of Jiangsu province [BK2009264]
- NSFC [51050110142]
- Scientific Research Foundation of the Graduate School of Southeast University [YBJJ1002]
- Chinese Academy of Science
Ask authors/readers for more resources
An efficient photoelectrode is fabricated by sequentially assembling 2.5 nm and 3.5 nm CdSe quantum dots (QDs) onto a TiO2 film. As revealed by UV-vis absorption spectroscopy, two sizes of CdSe QD can be effectively adsorbed on the TiO2 film. With a broader light absorption range and better coverage of CdSe QDs on the TiO2 film, a power conversion efficiency of 1.26% has been achieved for the TiO2/CdSe QD (2.5 nm)/CdSe QD (3.5 nm) cell under the illumination of one Sun (AM 1.5G, 100 mW cm(-2)). Electrochemical impedance spectroscopy shows that the electron lifetime for the device based on TiO2/CdSe QD (2.5 nm)/CdSe QD (3.5 nm) is longer than that for devices based on TiO2/CdSe QD (2.5 nm) and TiO2/CdSe QD (3.5 nm), indicating that the charge recombination at the interface is reduced by sensitizing with two kinds of CdSe QDs.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available