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Bottom-up holistic carrier management strategy induced synergistically by multiple chemical bonds to minimize energy losses for efficient and stable perovskite solar cells

引用

Journal of Energy Chemistry 2023年第1期76卷 277-287,I0008页

作者： Baibai Liu Ru Li Qixin Zhuang Xuemeng Yu Shaokuan Gong Dongmei He Qian Zhou Hua Yang Xihan Chen Shirong Lu Zong-Xiang Xu Zhigang Zang Jiangzhao Chen Key Laboratory of Optoelectronic Technology&Systems(Ministry of Education) College of Optoelectronic EngineeringChongqing UniversityChongqing 400044China SUSTech Energy Institute for Carbon Neutrality Department of Mechanicaland Energy EngineeringSouthern University of Science and TechnologyShenzhen 51855Guangdong China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Chongqing Institute of Green and Inteligent Technology University of Chinese Academy of Sciences(UCAS Chongqing)Chinese Academy of SciencesChongqing 400714China Department of Chemistry Southerm University of Science and TechnologyShenzhen 518055GuangdongChina

The defects from electron transport layer,perovskite layer and their interface would result in carrier nonradiative recombination *** buried interfacial contact is detrimental to charge extraction and device ***,we report a bottom-up holistic carrier management strategy induced synergistically by multiple chemical bonds to minimize bulk and interfacial energy losses for high-performance perovskite photovoltaics.4-trifluoromethyl-benzamidine hydrochloride(TBHCl)containing–CF_(3),amidine cation and Cl^(-)is in advance incorporated into SnO_(2)colloid solution to realize bottom-up *** synergistic effect of multiple functional groups and multiple-bond-induced chemical interaction are revealed theoretically and experimentally.F and Cl^(-)can passivate oxygen vacancy and/or undercoordinated Sn^(4+)defects by coordinating with Sn^(4+).The F can suppress cation migration and modulate crystallization via hydrogen bond with FA^(+),and can passivate lead defects by coordinating with Pb^(2+).The–NH_(2)–C=NH^(+)_(2)and Cl^(-)can passivate cation and anion vacancy defects through ionic bonds with perovskites,*** TBHCl modification,the suppression of agglomeration of SnO_(2)nanoparticles,bulk and interfacial defect passivation,and release of tensile strains of perovskite films are demonstrated,which resulted in a PCE enhancement from 21.28%to 23.40%and improved *** post-treatment,the efficiency is further improved to 23.63%.

关键词： Perovskite solar cells Bottom-up holistic carrier management strategy functional group synergistic effect Defect passivation Stress release

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