Abstract Black phosphorus quantum dots (BPQDs), as 2D van der Waals crystals, possess remarkable electronic and optoelectronic properties. Their excellent ultra-high mobility and thickness-dependent tunable direct bandgap can meet well the needs of polymer solar cells (PSCs) for adjustable energy levels in different active layer systems. The formation of better energy alignment in the devices is significantly beneficial to the charge transfer, exciton dissociation and reduce charge recombination, which can lead to improved power conversion efficiency (PCE). Herein, it is introduced to modify hole transport layer (HTL) as interfacial modifier (IM) in fullerene and non-fullerene PSCs. The cascade band structure is formed successfully between the anode and polymer donor. In PTB7-Th:PC71BM system, PCE is increased from 8.12% to 9.11%. In PM6:IT-4F system, PCE is enhanced from 11.65% to 12.81%. BPQDs are utilized as HTL IM in conventional device in our study, which can open up a promising route for photovoltaic research.

中文翻译：

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黑磷量子点作为聚合物太阳能电池中有效的层间改性剂

摘要 黑磷量子点（BPQDs）作为二维范德华晶体，具有卓越的电子和光电特性。它们优异的超高迁移率和依赖于厚度的可调直接带隙可以很好地满足聚合物太阳能电池（PSC）在不同有源层系统中可调能级的需求。在器件中形成更好的能量排列有利于电荷转移、激子解离和减少电荷复合，从而提高功率转换效率（PCE）。在此，介绍了在富勒烯和非富勒烯 PSC 中将空穴传输层 (HTL) 作为界面改性剂 (IM) 进行改性。在阳极和聚合物供体之间成功形成级联带结构。在 PTB7-Th:PC71BM 系统中，PCE 从 8.12% 增加到 9.11%。在 PM6 中：IT-4F系统，PCE从11.65%提升到12.81%。在我们的研究中，BPQDs 被用作传统器件中的 HTL IM，这可以为光伏研究开辟一条有前途的途径。