鎓盐添加剂提升钙钛矿太阳能电池的光电性能研究
An onium salt additive enhance the performance of perovskite solar cells
鲁涛 1陈思滢 1安志全 1张启明 1侯娟1
作者信息
- 1. 石河子大学理学院/先进储能材料与技术兵团重点实验室,新疆 石河子 832003
- 折叠
摘要
界面及晶界处存在的大量缺陷引起的非辐射复合阻碍了钙钛矿太阳能电池(PSCs)效率和稳定性的提高.本研究将一种双功能鎓盐,4-甲基苯磺酸吡啶鎓盐(PPTS)作为添加剂添加到钙钛矿前驱体溶液中.结果表明,由于 4-甲基苯磺酸吡啶鎓盐分子中磺酸基团与 Pb2+相互作用,吡啶与 I-相互作用,从而钝化缺陷,减少了非辐射复合损失.同时也调控钙钛矿薄膜的结晶,使得晶粒尺寸增大,结晶性提高.经过 PPTS 改性后,器件的开路电压(VOC)从 1.03 V提升至 1.07 V,填充因子(FF)从 75%提升至 78%.最终获得的太阳能电池光电转换效率(PCE)由 19.41%提升至 21.5%.
Abstract
Non-radiative recombination caused by defects at grain boundaries hinders the improvement of the performance of perovskite solar cells(PSCs).In this study,a bifunctional onium salt namely Pyridinium p-toluene sulfonate was added to the perovskite precur-sor solution.The defects of perovskite are passivated and the non-radiative recombination losses are reduced due to the sulfonic acid groups in PPTS molecules interact with Pb2+ and pyridine interact with I-.It also regulates the crystallization of perovskite films,which increases the grain size and improves the crystallinity.The open circuit voltage(VOC)of the PPTS-modified PSCs is increased from 1.03V to 1.07V,and the fill factor(FF)is increased from 75%to 78%.The resulting power conversion efficiency(PCE)of the so-lar cell is increased from 19.41%to 21.5%.
关键词
钙钛矿/缺陷钝化/非辐射复合/鎓盐/结晶调控Key words
perovskite/defect passivation/non-radiative recombination/onium salt/crystallization modulation引用本文复制引用
基金项目
国家自然科学基金(61704114)
新疆生产建设兵团重点领域科技攻关项目(2018AB004)
出版年
2024
NETL
NSTL
万方数据