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Radiative Recombination in Organic Solar Cells

有机太阳能电池中的辐射复合

基本信息

批准号：
254002545
负责人：
Professor Dr. Carsten Deibel
金额：
--
依托单位：
IEK-5: Photovoltaik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2014
资助国家：
德国
起止时间：
2013-12-31 至 2017-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/254002545?language=en
关键词：
Radiative Recombination Organic Solar Cells

项目摘要

The proposed project seeks to develop an improved understanding of radiative and non-radiative recombination processes in organic solar cells using electroluminescence spectroscopy and complementary characterization techniques. This goal requires us to first gain a solid understanding of the mechanism of radiative recombination in organic solar cells. We will approach it by performing very sensitive steady state as well as transient electroluminescence measurements on selected systems, and by interpreting the results aided by simulations based on trapping-and-release models. In a second step, we will apply our ability to interpret electroluminescence measurements to characterize a wider range of state-of-the-art organic solar cells. We will focus in our project on characterizing the role of localized states or traps on the performance, on studying the relation between the microstructure of the material and its density of states and on the difference in origin between radiative and non-radiative recombination processes. Furthermore, we will use electroluminescence spectroscopy to study the band tail states at the donor:acceptor interface, which have been shown to determine the open-circuit voltage in bulk-heterojunction solar cells. Finally, we will attempt to summarize our results by establishing fundamental limits for the efficiency of molecular solar cells, in order to develop guidelines for improving their power conversion efficiencies.

拟议的项目旨在利用电致发光光谱学和补充表征技术，提高对有机太阳能电池中辐射和非辐射复合过程的认识。这一目标要求我们首先对有机太阳能电池中的辐射复合机制有一个扎实的了解。我们将通过对选定的系统进行非常敏感的稳态和瞬态电致发光测量来接近它，并通过解释基于捕获和释放模型的模拟辅助结果。在第二步中，我们将运用我们解释电致发光测量的能力来表征更广泛的最先进的有机太阳能电池。我们将专注于我们的项目在性能上的局域态或陷阱的作用，在研究材料的微观结构和状态密度之间的关系，并在辐射和非辐射复合过程之间的起源差异。此外，我们将使用电致发光光谱研究在施主：受主界面，这已被证明是确定在体异质结太阳能电池的开路电压的带尾状态。最后，我们将试图总结我们的结果，建立分子太阳能电池的效率的基本限制，以制定提高其功率转换效率的指导方针。