钙钛矿太阳能电池研究

中文摘要钙钛矿吸收层对于太阳能电池光电转换效率的影响是至关重要的。本文采用溶液法制备了钙钛矿太阳能电池，研究了在特定退火温度下退火时间对钙钛矿吸收层结构、形貌及其吸收的影响。研究结果表明：退火时间的增加有利于薄膜的晶化，晶粒变大，吸收增强：但退火时间太长易使钙钛矿材料中出现P%I2的峰，从而使材料的吸收强度降低。我们进一步探索了材料的退火时间对电池器件的性能产生怎样的影响，通过测试电池的J-V(电流-电压)特性，研究发现：随着材料退火时间的增加，开路电压(V)、短路电流(J©)、和填充因子(FF)先增大到一个极大值点，然后减小，所以得出结论，在退火温度为95℃，退火时间为20分钟时，制备获得的钙钛矿太阳能电池的各方面性能达到最好。关键词：钙钛矿吸收层退火时间AbstractPerovskite absorption layer is a key factor to affect photoelectric conversionefficiency of the solar cells.This article used solution process to make perovskitesolar cells.We have researched how the annealing time influence the structure andmorphology and absorption of the perovskite absorption layer.It shows thatannealing time is important for the crystallization of membrane,crystal grain sizeand absorption of membrane,but if annealing time is too long,the perovskitematerials will decompose into PbI2,and then reduce the absorption of the materialstrength.We further studied the influence of the annealing time to the performanceof the device,through the J-V,it shows that with the increase of the annealing time,the short-circuit current open circuit voltage and fill factor first increases andthen decreases.For the experimental condition of 20 minutes of annealing time at95C,all the aspects of the perovskite solar cells are best.Keywords:perovskite solar cells,absorb layer,annealing time