Figures of Merit Guiding Research on Organic Solar Cells
Figures of Merit Guiding Research on Organic Solar Cells
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DOI：
10.1021/acs.jpcc.8b01598
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发表时间：
2018-03-22
影响因子：
3.7
通讯作者：
Baran, Derya
中科院分区：
文献类型：
--
作者：
Kirchartz, Thomas;Kaienburg, Pascal;Baran, Derya
虽然通过优化聚合物的能级以及最近的受体分子的能级可以在聚合物太阳能电池的效率方面取得实质性进展，但效率超过 10% 的进一步进展需要同时满足许多标准，即供体-受体异质结处的低能级偏移、非辐射复合导致的低开路电压损失以及高效的电荷传输和 收藏。在这篇专题文章中，我们讨论这些标准，考虑热力学限制、它们与光电流和光电压的相关性以及对填充因子的影响。每个标准均通过与器件性能直接相关的品质因数 (FOM) 进行量化。为了确保广泛的适用性，我们专注于可以通过常见实验轻松获得的 FOM。我们通过研究有机太阳能电池的历史和最新成就来证明这些 FOM 的相关性。我们希望所提出的 FOM 正在或将成为评估、监测和指导太阳能电池新型有机吸收材料进一步开发的有价值的工具。
While substantial progress in the efficiency of polymer-based solar cells was possible by optimizing the energy levels of the polymer and more recently also the acceptor molecule, further progress beyond 10% efficiency requires a number of criteria to be fulfilled simultaneously, namely, low energy-level offsets at the donor-acceptor heterojunction, low open-circuit voltage losses due to nonradiative recombination, and efficient charge transport and collection. In this feature article we discuss these criteria considering thermodynamic limits, their correlation to photocurrent and photovoltage, and effects on the fill factor. Each criterion is quantified by a figure of merit (FOM) that directly relates to device performance. To ensure a wide applicability, we focus on FOMs that are easily accessible from common experiments. We demonstrate the relevance of these FOMs by looking at the historic and recent achievements of organic solar cells. We hope that the presented FOMs are or will become a valuable tool to evaluate, monitor, and guide further development of new organic absorber materials for solar cells.