Stitching Perovskite Grains with Perhydropoly(Silazane)Anti-Template-Agent for High-Efficiency and Stable Solar Cells Fabricated in Ambient Air  

作　　者：Ting Wang Qu Yang Yanli Chen Qiong Peng Xiaosi Qi Hui Shen Xuncheng Liu Shaohui Li Haixuan Yu Yan Shen Mingkui Wang Xiu Gong 

机构地区：[1]College of Physics,Guizhou Province Key Laboratory for Optoelectronic Technology and Application,Guizhou University,Guiyang 550025,China [2]College of Graduate Studies,Guizhou University,Guiyang 550025,China [3]College of Materials and metallurgy,Guizhou University,Guiyang 550025,China [4]School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China [5]Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Energy & Environmental Materials》2023年第3期400-408,共9页能源与环境材料（英文）

基　　金：support from the Natural Science Foundation of China(no.22005071);the Natural Science Special(Special Post)Research Foundation of Guizhou University(no.2020-13);The cultivation programs Research Foundation of Guizhou University(no.2019-64).

摘　　要：All inorganic CsPbI_(3)perovskite solar cells(PSCs)have emerged as disruptive photovoltaic technology owing to their admirable photoelectric properties and the non-volatile active layer.However,the phase instability against moisture severely limits the fabrication environment for the high-efficiency devices,breaking through the confinement region to achieve scalable manufacturing has been the primary issue for future commercialization.Here,we develop a curing-anti-solvent strategy for fabricating high-quality and stable black-phase CsPbI_(3)perovskite films in ambient air by introducing an inorganic polymer perhydropolysilazane(PHPS)into methyl acetate to form anti-template agent.The cross-linked PHPS reduces moisture erosions while the hydrolyzate silanol network(–Si(OH)_(4)^(–))controls the perovskite crystal growth by forming Lewis adducts with PbI_(2)during the fabrication.The polycondensation adduct of Si–O–Si/Si–O–Pb strongly binds to CsPbI_(3)grains as a shield layer to hamper phase transition.Using the inorganic CsPbI_(3)perovskite thin-film with PHPS-modified anti-solvent processing as the light absorber,the n–i–p planar solar cell achieved an efficiency of 19.17%under standard illumination test conditions.More importantly,the devices showed excellent moisture stability,retaining about 90%of the initial efficiency after 1000 h under 30%RH.

关 键 词：anti-template agent crystal growth perhydropolysilazane perovskite solar cells stability 

分 类 号：TB34[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]