摘要
钙钛矿太阳能电池的快速发展使其成为新能源领域最具竞争力的光伏器件之一,然而,其在功率转换效率(PCE)和稳定性方面仍有很大的改进空间.本文引入D-苯基甘氨酸甲酯盐酸盐(PGMECl)作为钙钛矿中的添加剂,PGMECl含有的苯环、酯基、—NH3+末端和Cl-离子等多个官能团共同作用,可与未配位的Pb2+反应,钝化钙钛矿中的缺陷,使钙钛矿晶粒更加致密、表面粗糙度下降、电荷载流子的非辐射复合减少,并通过调整能级排列,使其更适合在倒置钙钛矿太阳能电池中传输电荷.实验结果表明,PGMECl改性器件的冠军效率为21.04%,远高于基础器件(17.79%).迟滞的减少也说明离子迁移的减少.含有PGMECl添加剂的器件在空气中[相对湿度(RH)为(40±5)%]黑暗条件下未封装老化1000h后,功率转换效率仍可保持初始效率的70%,而基础器件在保存500h后效率降至50%.
The rapid development of perovskite solar cells(PSCs)has made them one of the most competitive photo-voltaic devices in the field of new energy.However,there is still great room for improvement in photoelectric conversion efficiency(PCE)and stability.Here,an amino acid derivative hydrochloride was introduced as an additive in perovskite,D-phenylglycine methyl ester hydrochloride(PGMECl).PGMECl contains a benzene ring,an ester group,—NH3+terminal and Cl-ions.The multiple functional groups worked together to react with uncoordinated Pb2+,passivating defects in perovskite.The perovskite grains became denser,surface roughness decreased,and non-radiative recombination of charge carriers was reduced.By adjusting the energy level arrangement,it is more suitable for charge transfer in inverted perovskite solar cells.The results showed that the champion power conversion efficiency(PCE)of PGMECl modification device is 21.04%,which is much higher than that of control devices(17.79%).The decrease in hysteresis effect also indicates a decrease in ion migration.Under unencapsulated conditions,devices containing PGMECl additives can still maintain a PCE of 70%of the initial efficiency after aging in the dark in air[(40±5)%relative humidity(RH)]for 1000 h,while the efficiency of the basic device decreases to 50%after 500 h of storage.
作者
胡蝶
孙庆
孟祥歆
凌锦翔
成彬
康博南
HU Die;SUN Qing;MENG Xiangxin;LING Jinxiang;CHENG Bin;KANG Bonan(State Key Laboratory on Integrated Optoelectronics,College of Electronic Science and Engineering,Jilin University,Changchun 130012,China)
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2024年第5期92-101,共10页
Chemical Journal of Chinese Universities
基金
吉林省科技发展计划重点研究项目(批准号:20210203017SF)
有机光电子与分子工程教育部重点实验室开放基金(批准号:5322300122)
超分子结构与材料国家重点实验室开放项目(批准号:sklssm201809)资助.
