Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 3, Issue 10, Pages 1386-1392Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jz3003958
Keywords
-
Categories
Funding
- Ministerio de Economia y Competitividad [HOPE CSD2007-00007]
- Generalitat Valenciana [Prometeo/2009/058, ACOMP/2009/056, ACOMP/2009/095, ISIC/2012/008]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [201380/2010-2]
Ask authors/readers for more resources
We investigate the causes for obtaining higher open-circuit voltage in solar cells that use a fullerene with a smaller electron affinity. Using impedance spectroscopy technique, we show that the change of fullerene LUMO energy has very little influence on the kinetic rate of charge transfer across the interface. In terms of the Marcus theory, large reorganization energy values govern the recombination kinetic rate, which is only slightly dependent on the fullerene LUMO energy, and also depends weakly on the energy location of recombining carriers within the broad density of states. Since the recombination rate is very similar in the different devices, we conclude that the larger open-circuit voltage is due to the larger donor HOMO/acceptor LUMO offset.
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