Hole-Transporting Materials with a Two-Dimensionally Expanded π-System around an Azulene Core for Efficient Perovskite Solar Cells
Hole-Transporting Materials with a Two-Dimensionally Expanded π-System around an Azulene Core for Efficient Perovskite Solar Cells
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DOI：
10.1021/jacs.5b11008
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发表时间：
2015-12-23
影响因子：
15
通讯作者：
Murata, Yasujiro
中科院分区：
文献类型：
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作者：
Nishimura, Hidetaka;Ishida, Naoki;Murata, Yasujiro
合成并表征了由部分氧桥连的三芳胺骨架连接到甘菊环（1-3）或联苯核（4）上的二维扩展π-体系。当四取代的甘菊环1被用作钙钛矿太阳能电池中的空穴传输材料（HTM）时，发现观察到的性能（功率转换效率= 16.5%）上级当前HTM标准Spiro-OMeCl 3的性能。1中的钙钛矿/HTM界面处的空穴迁移率、控制HOMO和LUMO能级的能力以及空穴收集效率与参比化合物（2-4和螺-OMeV）的比较导致阐明HTM在钙钛矿太阳能电池中有效作用所需的关键因素。
Two-dimensionally expanded pi-systems, consisting of partially oxygen-bridged triarylamine skeletons that are connected to an azulene (1-3) or biphenyl core (4), were synthesized and characterized. When tetra-substituted azulene 1 was used as a hole-transporting material (HTM) in perovskite solar cells, the observed performance (power conversion efficiency = 16.5%) was found to be superior to that of the current HTM standard Spiro-OMeTAD. A comparison of the hole mobility, the ability to control the HOMO and LUMO levels, and the hole-collection efficiency at the perovskite/HTM interface in 1 with reference compounds (2-4 and Spiro-OMeTAD) led to the elucidation of key factors required for HTMs to act efficiently in perovskite solar cells.