Abstract Low bandgap lead-tin (Pb-Sn) hybrid perovskite solar cells (PVSCs) have gained a great deal of attentions due to their wide optical absorption range and environmental friendliness. Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is widely used as a hole transport layer for PVSCs. However, the metallic property of PEDOT:PSS causes a barrier at the interface between it and the active layer, thereby hindering the transport of photogenerated carriers. In this paper, in order to eliminate the influence of the interfacial barrier, the PEDOT:PSS surface was treated by hydroquinone (HQ), which lowers the hole transport barrier at the interface, and consequently reduces the interfacial resistance as well. The leakage current in the device with the HQ-treated PEDOT:PSS is significantly reduced, and the surface modification improves the interfacial contact. Compared with the Pb-Sn hybrid PVSCs with the PEDOT:PSS hole transport layer, the power conversion efficiency of PVSCs with the HQ-PEDOT:PSS hole transport layer is improved by 5.7%.

中文翻译：

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对苯二酚处理过的 PEDOT:PSS 改善铅锡混合钙钛矿太阳能电池的性能

摘要 低带隙铅锡（Pb-Sn）混合钙钛矿太阳能电池（PVSCs）由于其宽的光吸收范围和环境友好性而受到广泛关注。聚（3,4-亚乙基二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）被广泛用作 PVSC 的空穴传输层。然而，PEDOT:PSS 的金属特性会在其与活性层之间的界面处形成屏障，从而阻碍光生载流子的传输。在本文中，为了消除界面势垒的影响，PEDOT：PSS表面经过氢醌（HQ）处理，降低了界面处的空穴传输势垒，从而降低了界面电阻。经 HQ 处理的 PEDOT:PSS 器件中的漏电流显着降低，表面改性改善了界面接触。与带有 PEDOT:PSS 空穴传输层的 Pb-Sn 混合 PVSCs 相比，带有 HQ-PEDOT:PSS 空穴传输层的 PVSCs 的功率转换效率提高了 5.7%。