【摘要】 优化界面接触、增强界面处载流子传输对于提高钙钛矿电池性能具有重要意义。本研究将适量二甲基亚砜（DMSO）添加到聚（3,4-乙烯二氧噻吩）-聚（苯乙烯磺酸盐）（PEDOT∶PSS）空穴传输层中，改善了空穴传输层的导电性和空穴传输特性，有效提高了反式平面钙钛矿太阳能电池光伏性能。短路电流(J_sc)从21.29 mA/cm²提高到22.15 mA/cm²,填充因子（FF）从76.35%提高到80.09%,转换效率（PCE）从16.02%提高到17.01%。薄膜与器件性能综合测试结果表明，DMSO的掺入使PEDOT∶PSS发生适度相分离，形成更好的PEDOT导电通道，增强了PEDOT∶PSS的导电特性。稳态光致发光光谱呈现出显著的荧光猝灭效应，也表明掺杂DMSO后PEDOT∶PSS的空穴提取能力得到提高，钙钛矿活性层与阳极之间的空穴传输更加顺畅，有助于实现高达80%以上的填充因子。本研究为改善反式平面钙钛矿太阳电池或有机太阳电池光伏性能提供了一种高效、简便的方法，具有很好的现实意义。更多还原

【Abstract】 In this work,the photovoltaic properties of inverted planar perovskite solar cells are promoted via a simple method by adding Dimethyl sulfoxide （ DMSO） into Poly （ 3,4-ethylenedioxythiophene） -poly （ styrenesulfonate）（ PEDOT∶ PSS） hole transport layer. Compared to the control device based on pristine PEDOT∶ PSS,the device with DMSO doping shows different enhancement in short circuit current(J_sc) ,fill factor（FF） and power conversion efficiency（ PCE） ,respectively. The J_scis increased from 21. 29 m A / cm²to 22. 15 mA / cm²,the FF is increased from76. 35% to 80. 09% ,and the PCE is increased from 16. 02% to 17. 01% ,showing 4% ,5% and 6% enhancement,respectively. A combination of characterizations has been utilized to systematically investigated the effect of DMSO doping on properties of PEDOT∶ PSS and perovskite film. It can be found that the incorporation of DMSO leads to a moderate phase separation of PEDOT∶ PSS,which causes the PEDOT component to form a better conductive channels,enhancing the conductivity and hole transport ability of PEDOT∶ PSS. The steady-state photoluminescence spectra exhibit significant fluorescence quenching,indicating promoted hole extraction ability of PEDOT∶ PSS after doping with DMSO. Thus,a more efficient hole transfer between the perovskite active layer and the anode is achieved,which contributes to the high fill factor above 80% . So that an effective and easy approach to improve the photovoltaic performance of inverted planar perovskite solar cells or organic solar cells is provided.更多还原