利用吡啶添加剂提高钙钛矿太阳能电池的光伏性能

研究了吡啶作为添加剂对一步法制备甲胺铅碘钙钛矿太阳能电池光电性能的影响.利用SEM、AFM、XRD、UV-Vis、PL等手段研究了不同吡啶掺杂浓度对制备的CH3 NH3 PbI3薄膜的表面形貌、结晶度和光学性能的影响.研究结果表明:少量的吡啶掺杂可以提高钙钛矿薄膜的覆盖率及降低薄膜的表面粗糙度.当在CH3 NH3 PbI3前驱体溶液中添加体积分数为1%的吡啶时,制备的钙钛矿太阳能电池的能量转换效率达到7.33%,而未加吡啶的对比器件效率仅为1.01%.进一步添加吡啶会导致钙钛矿材料的降解.

Improvement of The Performance of Planar Heterojunction Perovskite Solar Cells by Using Pyridine as Additive

An efficient one-step solution method was demonstrated to prepare CH3 NH3 PbI3 perovskite solar cells by adding pyridine to the precursor solution. The film morphology, crystallinity, and optical properties of CH3 NH3 PbI3 perovs-kite films were investigated by SEM, AFM, XRD, UV-Vis and PL. The results show that the perovskite film properties (coverage of perovskite films and surface morphology) can be manipulated by incorporating a small amount of pyridine. The adding of pyridine is helpful to obtain a smooth, continuous and dense morphology. With the optimized pyridine vol-ume fraction of 1%, the power conversion efficiency of 7. 33% with Jsc of 14. 64 mA/cm2 , Voc of 0. 82 V, and FF of 0. 61 is obtained for the planar device structure. By contrast, the power conversion efficiency of the device without pyridine is only 1. 01%. However, the further increase of the content of pyridine can result in the decomposition of perovskite, be-cause the pyridine can easily form complexes with perovskite and induce the perovskite dissociation.