基于P3HT空穴传输层的碳基无机CsPbIBr2钙钛矿太阳电池

Efficient Carbon-Based Inorganic CsPbIBr2 Perovskite Solar Cells with P3HT Hole Transport Layers

钙钛矿太阳电池是近年来快速兴起的第三代太阳电池,其中热稳定性优异、成本低、带隙超过2.0 eV的CsPbIBr2无机钙钛矿太阳电池效率已经突破11%,应用前景广阔。目前,大部分研究都集中在无空穴传输层的碳基CsPbIBr2钙钛矿太阳电池,较低的开路电压和填充因子是限制效率提升的主要原因。本文将溶液法制备的3-己基聚噻吩(P3HT)空穴传输层应用于CsPbIBr2钙钛矿太阳电池,提高了内建电势,改善了载流子输运,减少了载流子复合,实现了电池开路电压、填充因子的改善和能量转换效率的提升,丰富了CsPbIBr2钙钛矿太阳电池的载流子输运机理和效率提升途径,具有一定的推广意义。

Perovskite solar cells are the third generation solar cells having been developing rapidly in recent years,among which there are inorganic CsPbIBr2 perovskite solar cells. Inorganic CsPbIBr2 perovskite solar cells have the advantages of excellent thermal stability,low cost,and band gap over 2.0 eV,and their power conversion efficiency has reached 11%,demonstrating a broad application prospect. At present,most related studies focused on carbonbased CsPbIBr2 perovskite solar cells without hole transport layers,and demonstrated that the relatively low opencircuit voltage and fill factor are the main reasons for limiting the efficiency improvement. In this work,thepoly(3-hexylthiophene)(P3HT)hole transport layers prepared by the solution method are applied to CsPbIBr2 perovskite solar cells. The results show that the built-in potential is increased,the carrier transport capability is improved,and the carrier recombination is reduced. This method can be used to improve the open circuit voltage and fill factor of CsPbIBr2 perovskite solar cells,and enhance the power conversion efficiency. It enriches the carrier transport mechanism and efficiency improvement approach of CsPbIBr2 perovskite solar cells,and has certain popularization significance.