期刊
NANOTECHNOLOGY
卷 19, 期 42, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/19/42/424012
关键词
-
资金
- Cavendish-KAIST Research Cooperation Centre
- EU-FP6 project MODECOM [FP6-2004-NMP-NSF-1]
We investigate the transient photocurrents of organic photovoltaic devices in response to a sharp turn-on of illumination, by numerical modeling of the drift-diffusion equations. We show that the photocurrent turn-on dynamics are determined not only by the transport dynamics of free charges, but also by the time required for the population of geminate charge pairs to reach its steady-state value. The dissociation probability of a geminate charge pair is found to be a key parameter in determining the device performance, not only by controlling the efficiency at low intensities, but also in determining the fate of charge pairs formed by bimolecular recombination at high intensities. Bimolecular recombination is shown to reduce the turn-on time at high intensities, since the typical distance traveled by a charge pair is reduced.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据