Abstract In this work, highly stable and efficient perovskite solar cells (PSCs) in n-i-p configuration has been fabricated. Application of poly (4-vinylpyridine) (PVP) interlayer into the perovskite films via solution based process and quaternary semiconductor Cu2MSnS4 (M = Co2+, Ni2+, Zn2+) (CMTS) nanostructure particles as an inorganic hole transporting material (HTM), result in modified perovskite surface and improving the long term stability and the photovoltaic parameters of the PSCs. The power conversion efficiency (PCE) of the record device with Cu2ZnSnS4(CZTS) HTM and PVP interlayer reaches 13.57%, Voc gains 1.03 V, fill factor (FF) increases up to 70.64% and the device demonstrates low hysteresis (4.14%). Photoluminescence (PL), absorption spectra, electrochemical impedance spectroscopy (EIS) and FESEM images reveal that, the interface between PVP and inorganic CMTS nanostructure particles favorably can reduce non-radiative recombination and enhance Voc. In addition, the presence of hydrophobic PVP interlayer and CMTS nanostructure particles capping with PVP ligands prevent the ingress of the moisture in to the perovskite layer and result in improved stability, where the devices based on CZTS HTM, retain 97% of the initial efficiency after 30 days at room temperature and 35–40% relative humidity.

中文翻译：

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以四元半导体 Cu2MSnS4（M=Co2+、Ni2+、Zn2+）作为空穴传输材料的聚（4-乙烯基吡啶）改性钙钛矿太阳能电池的稳定性和性能增强

摘要 在这项工作中，制备了具有 nip 配置的高度稳定和高效的钙钛矿太阳能电池 (PSC)。通过基于溶液的工艺和四元半导体 Cu2MSnS4（M = Co2+、Ni2+、Zn2+）（CMTS）纳米结构颗粒作为无机空穴传输材料（HTM），将聚（4-乙烯基吡啶）（PVP）中间层应用到钙钛矿薄膜中，导致改性钙钛矿表面并提高 PSC 的长期稳定性和光伏参数。Cu2ZnSnS4(CZTS) HTM和PVP中间层的记录器件的功率转换效率(PCE)达到13.57%，Voc增加1.03 V，填充因子(FF)增加到70.64%，器件表现出低滞后(4.14%)。光致发光 (PL)、吸收光谱、电化学阻抗谱 (EIS) 和 FESEM 图像表明，PVP 和无机 CMTS 纳米结构颗粒之间的界面可以有利地减少非辐射复合并提高 Voc。此外，疏水性 PVP 夹层和用 PVP 配体覆盖的 CMTS 纳米结构颗粒的存在防止水分进入钙钛矿层并提高稳定性，其中基于 CZTS HTM 的器件在使用后仍保持 97% 的初始效率。在室温和 35-40% 的相对湿度下 30 天。