期刊
ORGANIC ELECTRONICS
卷 14, 期 3, 页码 973-978出版社
ELSEVIER
DOI: 10.1016/j.orgel.2013.01.011
关键词
Transient photoresponse of organic solar cells and photodiodes; Nonlinear loss of charge carriers; Temperature independent charge carrier generation; Field dependent charge transfer dissociation; Comparison of simulation and measurements; Multiple-trapping-model
资金
- Deutsche Forschungsgemeinschaft (DFG)
- State of Baden-Wurt-temberg through the DFG-Center for Functional Nanostructures (CFN)
Measurements of the transient photoresponse of organic photodiodes and solar cells show a strong saturation effect in the quantum efficiency at laser fluences above approximately 3.3 mu J/cm(2). By a comparison of the measured intensity, temperature and field dependence of the transient pulse responses with extended drift-diffusion simulations, the loss of charge carriers can be traced back to a quadratic loss channel in the charge carrier generation process. In contrast to the predictions of the commonly used Onsager-Braun charge carrier generation model, we demonstrate that the dissociation of bound electron-hole-pairs is temperature independent but slightly field dependent. (C) 2013 Elsevier B.V. All rights reserved.
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