钙钛矿太阳能电池中小分子空穴传输材料的研究进展

有机-无机钙钛矿太阳能电池(PSCs)从2009年低于5%的能量转换效率到现在经过认证的超过22%的效率，成为科研热点和最有希望商业化的新型太阳能电池。在高性能的PSCs中，空穴传输材料是关键的一环，起到从钙钛矿活性层材料到对电极有效抽取和传输空穴的作用。本文在现有研究成果的基础上，对有机分子空穴传输材料在PSC中的应用进行总结，并强调分子材料结构对PSC器件性能(效率和稳定性)的影响。

Recent Progress in Hybrid Perovskite Solar Cells Based on p-Type Small Molecules as Hole Transporting Materials

Organic-inorganic perovskite solar cells (PSCs) have become one of the most promising solar cells, as the power conversion efficiency (PCE) has increased from less than 5% in 2009 to certified values of over 22%. In the typical PSC device architecture, hole transport materials that can effectively extract and transmit holes from the active layer to the counter electrode (HTMs) are indispensable. The well-known small molecule 2, 2', 7, 7'-tetrakis-(N, N-di-4-methoxy-phenyl amino)-9, 9'-spirobifluorene (spiro-OMeTAD) is the best choice for optimal perovskite device performance. Nevertheless, there is a consensus that spiro-OMeTAD by itself is not stable enough for long-term use in devices due to the sophisticated oxidation process associated with undesired ion migration/interactions. It has been found that spiro-OMeTAD can significantly contribute to the overall cost of materials required for the PSC manufacturing, thus its market price makes its use in large-scale production costly. Besides, another main drawback of spiro-OMeTAD is its poor reproducibility.