We investigated the effect of the morphology of 2,2’,7,7’-tetrakis-(N,N-di-p-methoxyphenylamine)-9,9’-spirobifluorene (spiro-OMeTAD) prepared using chlorobenzene (CB) and 1,2-dichlorobenzene (DCB) on the performance of perovskite solar cells (PSCs). We find that a more uniform and smoother spiro-OMeTAD layer was obtained using DCB than CB. The PSCs prepared using DCB exhibited a higher power conversion efficiency (PCE = 16.2%) than those obtained using CB (PCE = 14.5%). The hysteresis was reduced from 4.8% to 0.6%, with improved stability. The highest PCE of PSCs prepared using DCB was 16.6%, indicating that the use of DCB for spiro-OMeTAD processing enables the fabrication of high-performance PSCs.

中文翻译：

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高性能钙钛矿太阳能电池空穴传输层形态的溶剂控制

我们调查了2,2'，7,7'-四（-N，N-二-对甲氧基苯胺）-9,9'-螺二芴（spiro-OMeTAD）的形态学影响，该二氯苯是用氯苯（CB）和1,2-二氯苯（DCB）对钙钛矿太阳能电池（PSC）的性能。我们发现使用DCB比使用CB获得了更均匀，更平滑的spiro-OMeTAD层。使用DCB制备的PSC的功率转换效率（PCE = 16.2％）比使用CB获得的PSC（PCE = 14.5％）高。磁滞从4.8％降低到0.6％，稳定性得到改善。使用DCB制备的PSC的最高PCE为16.6％，这表明将DCB用于spiro-OMeTAD处理可以制造高性能的PSC。