While hole extraction is crucial for the external quantum efficiency of conventional n-i-p colloidal quantum dot (CQD) solar cells (CQDSCs), sulfur-passivated p-type CQDs (pCQDs) have been the best hole-transport material (HTM) to date. In this work, we developed organic π-conjugated polymers (π-CPs) that can achieve substantially improved HTM performance compared with conventional pCQDs. A weakly electron-withdrawing triisopropylsilylethynyl (TIPS) group was employed with a weak donor moiety, benzo[1,2-b:4,5:b′]-dithiophene (BDT), in the push–pull structured π-CPs to optimize the optoelectronic properties of the HTM. The CQDSCs using TIPS-containing π-CPs achieved a PCE (13.03%) substantially higher than those previously reported using pCQD (11.33%) or π-CPs (11.25%) owing to the improved charge collection efficiency near the photoactive CQD layer/HTM interface. To the best of our knowledge, our CQDSCs using TIPS-based π-CPs achieved the highest reported PCE among SSE-free CQDSCs.

中文翻译：

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具有工程π共轭聚合物的基于PbS的量子点太阳能电池的效率达到13％

尽管空穴提取对于常规的nip胶体量子点（CQD）太阳能电池（CQDSC）的外部量子效率至关重要，但迄今为止，硫钝化的p型CQD（pCQDs）一直是最好的空穴传输材料（HTM）。在这项工作中，我们开发了与常规pCQD相比可以显着提高HTM性能的有机π共轭聚合物（π-CP）。在推挽结构的π-CP中使用弱吸电子的三异丙基甲硅烷基乙炔基（TIPS）和弱给体基团苯并[1,2-b：4,5：b']-二噻吩（BDT） HTM的光电特性。使用含TIPS的π-CP的CQDSC的PCE（13.03％）显着高于先前使用pCQD（11.33％）或π-CP的报告的PCE（11。25％）归因于光敏CQD层/ HTM界面附近电荷收集效率的提高。据我们所知，我们的使用基于TIPS的π-CP的CQDSC在无SSE的CQDSC中实现了最高的PCE。