Simultaneous bottom-up double-layer synergistic engineering by multifunctional natural molecules for efficient and stable SnO2-based planar perovskite solar cells  

作　　者：Yue Liu Yanbo Gao Tingting Li Xinyu Bao Zehua Xu Fujun Zhang Min Lu Zhennan Wu Yanjie Wu Guang Sun Xue Bai Zhifeng Shi Junhua Hu Yu Zhang 

机构地区：[1]State Key Laboratory of Integrated Optoelectronics,College of Electronic Science and Engineering,Jilin University,2699 Qianjin Street,Changchun 130012 Jilin,China [2]School of Materials Science and Engineering,Jilin Jianzhu University,Changchun 130018,Jilin,China [3]China-Japan Union Hospital,Jilin University,Changchun 130012,jilin,China [4]Key Laboratory of Materials Physics of Ministry of Education,Department of Physics and Engineering,Zhengzhou University,Zhengzhou 402,Henan,Chin [5]State Centre for International Cooperation on Designer Low-carbon&Environmental Materials,School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,Henan,China

出　　处：《Journal of Energy Chemistry》2023年第5期40-47,I0002,共9页能源化学（英文版）

基　　金：supported by the National Nature Science Foundation of China(12204193,U21A2068,12104178,61935009,11974142,12174151);the Science and Technology Development Program of Jilin Province(20200401059GX,20220101008JC)。

摘　　要：The performance and stability of perovskite solar cells(PSCs)is limited by detrimental defects,mostly distributed at the grain boundary(GB)of bulk perovskite film and interface,which induce serious carrier non-radiative recombination.Therefore,there is particularly urgent to realize simultaneous passivation of bulk defects and interfacial defects.In this work,a simple,low-cost and effective multifunctional modification strategy is developed by introducing theλ-Carrageenan(λ-C)as the interfacial layer of SnO_(2)/perovskite.The sulfate groups ofλ-C not only play a positive role in passivating the Sn4+from SnO_(2)film,resulting in high conductivity,but also effectively passivate the defects at the SnO_(2)/perovskite interface.Meanwhile,λ-C can effectively passivate the defects in the perovskite film due to the strong binding force between the high content of sulfate groups and PbI2.The synergistic effect ofλ-C simultaneously achieves interfacial defects and bulk defects passivation,better crystalline quality,suppressed charge recombination,released interfacial stress and more favorable interfacial energy level alignment.Based on the above efficient synergy,theλ-C-modified device achieves a high efficiency of 23.81%,which is~24.53%higher than the control device(19.12%).To our best knowledge,23.81%of power conversion efficiency(PCE)is the highest reported PCE value of PSCs employing green natural additives.Moreover,long-term and thermal stabilities are significantly improved after interface modification.Thus,this work provides an idea for developing multifunctional natural materials towards the attainment of the efficient and stable PSCs.

关 键 词：Perovskite solar cells γ-Carrageenan Interfacial modification Stability Defect passivation 

分 类 号：TB383.2[一般工业技术—材料科学与工程] TM914.4[电气工程—电力电子与电力传动]