【摘要】 有机-无机杂化钙钛矿太阳能电池具有成本低、工艺简单以及光电转换效率高等优点,备受国内外学者的关注。研究表明,钙钛矿薄膜的可控制备对钙钛矿太阳能电池的性能具有重要影响。本文通过在钙钛矿前驱体溶液中用氯甲胺（CH₃NH₃Cl,MACl）部分取代碘甲胺（CH₃NH₃I,MAI）,探讨了MACl对CH₃NH₃PbI₃薄膜及其器件光伏性能的影响。实验结果表明,MACl的加入使CH₃NH₃PbI₃在成膜过程中产生相对过量的PbI₂。在MAC1和PbI₂的协同作用下,CH₃NH₃PbI₃的结晶速度减慢,晶粒尺寸增大,获得的钙钛矿薄膜表面致密且平整,相应器件的效率从15.8%提高到了17.26%。更多还原

【Abstract】 Organic-inorganic hybrid perovskite solar cells have the advantages of low cost, simple process and high photoelectric conversion efficiency, which have attracted much attention in the world. The controllable preparation of perovskite films has critical impact on the performance of the perovskite solar cells. Herein, iodine methylamine（CH₃NH₃I, MAI） was partially replaced with methylamine chloride（CH₃NH₃Cl, MACl） in the perovskite precursor solution, and the photoelectric property of the device was discussed.It is found that the addition of MACl results inrelatively excessive amount of PbI₂ during the formation of perovskite film. Under the synergetic effect of MACl and PbI₂, a dense and smooth perovskite film can be obtained, which is related with the reduced crystallization rate of perovskite and the increase of perovskite grain size. The efficiency of the corresponding perovskite solar cell can be improved from 15.8% to 17.26%.更多还原