Stabilizing Buried Interface via Synergistic Effect of Fluorine and Sulfonyl Functional Groups Toward Efficient and Stable Perovskite Solar Cells

作     者：Cheng Gong Cong Zhang Qixin Zhuang Haiyun Li Hua Yang Jiangzhao Chen Zhigang Zang Cheng Gong;Cong Zhang;Qixin Zhuang;Haiyun Li;Hua Yang;Jiangzhao Chen;Zhigang Zang

作者机构：Key Laboratory of Optoelectronic Technology and Systems(Ministry of Education)Chongqing UniversityChongqing 400044People’s Republic of China Institute of High Energy PhysicsChinese Academy of Sciences(CAS)Beijing 100049People’s Republic of China 

出 版 物：《Nano-Micro Letters》 (纳微快报（英文版）)

年 卷 期：2023年第15卷第2期

页      面：32-45页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the Defense Industrial Technology Development Program(JCKY2017110C0654) National Natural Science Foundation of China(11974063,61904023,62274018) Chongqing Special Postdoctoral Science Foundation(cstc2019jcyj-bsh0026) Fundamental Research Funds for the Central Universities(2021CDJQY-022) 

主　　题：Perovskite solar cells Buried interface Multiple chemical bonds Synergistic effect of functional groups Defect passivation 

摘      要：The interfacial defects and energy barrier are main reasons for interfacial nonradiative *** addition,poor perovskite crystallization and incomplete conversion of PbI_(2) to perovskite restrict further enhancement of the photovoltaic performance of the devices using sequential ***,a buried interface stabilization strategy that relies on the synergy of fluorine(F)and sulfonyl(S=O)functional groups is proposed.A series of potassium salts containing halide and non-halogen anions are employed to modify SnO_(2)/perovskite buried *** chemical bonds including hydrogen bond,coordination bond and ionic bond are realized,which strengthens interfacial contact and defect passivation *** chemical interaction between modification molecules and perovskite along with SnO_(2) heightens incessantly as the number of S=O and F *** chemical interaction strength between modifiers and perovskite as well as SnO_(2) gradually increases with the increase in the number of S=O and *** defect passivation effect is positively correlated with the chemical interaction *** crystallization kinetics is regulated through the compromise between chemical interaction strength and wettability of *** with Cl−,all non-halogen anions perform better in crystallization optimization,energy band regulation and defect *** device with potassium bis(fluorosulfonyl)imide achieves a tempting efficiency of 24.17%.