Electron mobility of non-fullerene acceptors using a time of flight method
Electron mobility of non-fullerene acceptors using a time of flight method
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DOI：
10.1016/j.orgel.2018.08.027
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发表时间：
2018-12
影响因子：
3.2
通讯作者：
N. Mica;Stuart A. J. Thomson;I. Samuel
中科院分区：
文献类型：
--
作者：
N. Mica;Stuart A. J. Thomson;I. Samuel
有机太阳能电池是一种很有前途的可再生能源技术，具有机械柔性和溶液加工性的优点。电荷载流子迁移率是一个重要的参数，因为它影响电荷提取和复合之间的竞争，从而影响电池效率。我们报道了两种高性能非富勒烯受体ITIC和IDTBR在纯膜中的电子迁移率，并与它们的共同供体混合。在纯膜中，ITIC的零场电子迁移率为7.4 × 10− 4cm 2/Vs，当与PTB 7-Th或P3 HT混合时，其下降到1.0 × 10− 4cm 2/Vs。发现IDTBR：P3 HT共混物的电子迁移率略低，为5.6 × 10− 5cm 2/Vs。测得的电子迁移率与这些共混物中的空穴迁移率在同一数量级，导致平衡的传输和高效的光伏电池。
Organic solar cells are a promising renewable energy technology, offering the advantages of mechanical flexibility and solution processability. The charge carrier mobility is an important parameter as it influences the competition between charge extraction and recombination and therefore the cell efficiency. We report the electron mobility of two high performance non-fullerene acceptors ITIC and IDTBR in neat films and blended with their common donors. In a pure film ITIC has a zero-field electron mobility of 7.4 × 10−4cm2/Vs, which dropped to 1.0 × 10−4cm2/Vs when put into a blend with PTB7-Th or P3HT. The IDTBR:P3HT blend was found to have a slightly lower electron mobility of 5.6 × 10−5cm2/Vs. The measured electron mobility is the same order of magnitude as the hole mobility in these blends, leading to balanced transport and efficient photovoltaic cells.