An efficient post-functionalization protocol of the Mitsunobu reaction between a commercial reactive polymer of poly(4-vinylphenol) (PVP) and 9-(2-hydroxylethyl)-N,N,N,N-tetrakis(4-methoxyphenyl)-9H-carbazole-2,7-diamine is reported to synthesize a novel side-chain polymer (PVP-CZ) with a high density of hole transporting moieties. The polymer PVP-CZ exhibits adequate solvent resistance and excellent film forming ability for the fabrication of inverted perovskite solar cells (PVSCs). The thermal, optical and electrochemical properties of PVP-CZ were investigated in detail. The steady-state photoluminescence (PL) and time resolved photoluminescence (TRPL) decay showed the excellent hole-extracting ability of dopant-free PVP-CZ from the perovskite layer. As a result, the inverted PVSCs delivered a respectable power conversion efficiency of 17.75% with a high fill factor of 81.07%. These results indicate that the synthetic strategy using the post-functionalization of the Mitsunobu reaction is a promising protocol to develop novel side-chain hole transporting polymers for highly efficient PVSCs.

中文翻译：

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通过Mitsunobu后官能化合成侧链空穴传输聚合物，用于高效倒钙钛矿太阳能电池

商业上的聚（4-乙烯基苯酚）（PVP）和9-（2-羟乙基）-N，N，N，N-四（4-甲氧基苯基）-9反应性聚合物之间的Mitsunobu反应的有效后功能化方案据报道，H-咔唑-2,7-二胺可合成具有高密度空穴传输部分的新型侧链聚合物（PVP-CZ）。聚合物PVP-CZ具有足够的耐溶剂性和出色的成膜能力，可用于制造反钙钛矿太阳能电池（PVSC）。PVP-CZ的热，光学和电化学性能被详细调查。稳态光致发光（PL）和时间分辨光致发光（TRPL）衰减显示了钙钛矿层中无掺杂PVP-CZ的出色空穴提取能力。结果，反向PVSC的功率转换效率达到了17.75％，填充系数高达81.07％。这些结果表明使用Mitsunobu反应的后功能化的合成策略是开发用于高效PVSC的新型侧链空穴传输聚合物的有希望的协议。