【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1000 h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500 h后效率降至50%.更多还原

【Abstract】 The rapid development of perovskite solar cells（PSCs） has made them one of the most competitive photovoltaic 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 to50%after 500 h of storage.更多还原