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On the recombination order of surface recombination under open circuit conditions

机译：开路条件下表面重组的重组顺序

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摘要

Understanding the recombination dynamics of organic and perovskite solar cells has been a crucial prerequisite in the steadily increasing performance of these promising new types of photovoltaics. Surface recombination in particular has turned out to be one of the last remaining roadblocks, which specifically reduces the open circuit voltage. In this study, the relationship between the rate of surface recombination and the density of charge carriers is analyzed, revealing a cubic dependence between these two parameters. This hypothesis is then tested and verified with the recombination dynamics of an organic solar cell known to exhibit significant surface recombination and a high energy proton irradiated CH3NH3PbI_3 perovskite solar cell during white light illumination. Incidentally, these results can also explain recombination orders exceeding the commonly known threshold for bimolecular recombination that have been observed in some studies without the need for a charge carrier dependent bimolecular recombination coefficient.
机译：了解有机和Perovskite太阳能电池的重组动力学是在稳定增加这些有前途的新型光伏的性能方面的关键先决条件。特别地，表面重组已经原来是最后剩余的障碍之一，具体降低了开路电压。在该研究中，分析了表面重组率与电荷载体密度之间的关系，揭示了这两个参数之间的立方依赖性。然后通过已知的有机太阳能电池的重组动力学测试并验证该假设，该假设在白光照射期间具有显着的表面重组和高能质子辐照的CH3NH3PBI_3钙钛矿太阳能电池。顺便提及，这些结果还可以解释超过在某些研究中观察到的分散重组的常见已知阈值的复合终止率，而没有需要电荷载体依赖性的双分子重组系数。

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