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Dopant-free and low-cost molecular “bee” hole-transporting materials for efficient and stable perovskite solar cells
Journal of Materials Chemistry C ( IF 6.4 ) Pub Date : 2017-10-12 00:00:00 , DOI: 10.1039/c7tc03931j
Xicheng Liu 1, 2, 3 , Fei Zhang 3, 3, 4, 5, 6 , Zhe Liu 1, 2, 3 , Yin Xiao 3, 3, 4, 5, 6 , Shirong Wang 3, 3, 4, 5, 6 , Xianggao Li 3, 3, 4, 5, 6
Affiliation  

With the dramatic development of the power conversion efficiency (PCE) of perovskite solar cells (PSCs), the device lifetime has attracted extensive research interest and concern. To enhance device durability, developing dopant-free hole-transporting materials (HTMs) with a high performance is a promising strategy. Herein, three new HTMs with a N,N′-diphenyl-N,N′-di(m-tolyl)benzidine (TPD) core: TPD-4MeTPA, TPD-4MeOTPA and TPD-4EtCz are designed and synthesized, showing suitable energy levels and excellent film-formation properties. PCEs of 15.28% were achieved based on pristine TPD-4MeOTPA as the HTM, which is a little lower than that of the p-doped 2,2′,7,7′-tetrakis-(N,N-di-4-methoxyphenylamino)-9,9′-spirobifluorene (spiro-OMeTAD)-based device (17.26%). Importantly, the devices based on the new HTMs show relatively improved stability compared to devices based on spiro-OMeTAD when aged under ambient air with 30% relative humidity in the dark.

中文翻译:

不含钙的低成本分子“蜂”空穴传输材料,用于高效,稳定的钙钛矿太阳能电池

随着钙钛矿太阳能电池(PSC)的功率转换效率(PCE)的迅猛发展,器件的使用寿命引起了广泛的研究兴趣和关注。为了提高器件的耐用性,开发高性能的无掺杂空穴传输材料(HTM)是一种有前途的策略。这里,用三个新HTMS ÑÑ N'-二苯基ÑÑ ' -二(-甲苯基)联苯胺(TPD)的核心:TPD-4MeTPATPD-4MeOTPATPD-4EtCz被设计并合成,表现出合适的能量水平和优异的成膜性能。基于原始TPD-4MeOTPA, PCE达到15.28%作为HTM,它比p掺杂的2,2',7,7'-四(-NN-二-4-甲氧基苯基氨基)-9,9'-螺双芴(-OMeTAD )的设备(17.26%)。重要的是,与基于螺旋-OMeTAD的设备相比,基于新HTM的设备在黑暗中相对湿度为30%的环境空气中老化时,显示出相对更高的稳定性。
更新日期:2017-11-16
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