Polar or nonpolar?That is not the question for perovskite solar cells  

作　　者：Boyuan Huang Zhenghao Liu Changwei Wu Yuan Zhang Jinjin Zhao Xiao Wang Jiangyu Li 

机构地区：[1]Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China [2]Guangdong Key Laboratory of Functional Oxide Materials and Devices,Southern University of Science and Technology,Shenzhen 518055 [3]Shenzhen Key Laboratory of Nanobiomechanics,Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,China [4]School of Materials Science and Engineering,Key Laboratory of Smart Materials and Structures Mechanics of Hebei Province,Shijiazhuang Tiedao University,Shijiazhuang 050043,China

出　　处：《National Science Review》2021年第8期52-63,共12页国家科学评论（英文版）

基　　金：supported by the Key-Area Research and Development Program of Guangdong Province (2018B010109009);the Shenzhen Science and Technology Innovation Committee(JCYJ20180507182257563);the National Natural Science Foundation of China (11772207 and 22003074);the Instrument Developing Project of Chinese Academy of Sciences(ZDKYYQ20180004);the Natural Science Foundation of Guangdong Province (2017A030313342 and 2020A1515110580);the State Key Laboratory of Mechanics and Control of Mechanical Structures (Nanjing University of Aeronautics and Astronautics)(MCMS-E-0420G01);the Guangdong Provincial Key Laboratory Program from the Department of Science and Technology of Guangdong Province(2021B1212040001);the SIAT Innovation Program for Excellent Young Researchers

摘　　要：Perovskite solar cells(PSC)are promising next generation photovoltaic technologies,and there is considerable interest in the role of possible polarization of organic-inorganic halide perovskites(OIHPs)in photovoltaic conversion.The polarity of OIHPs is still hotly debated,however.In this review,we examine recent literature on the polarity of OIHPs from both theoretical and experimental points of view,and argue that they can be both polar and nonpolar,depending on composition,processing and environment.Implications of OIHP polarity to photovoltaic conversion are also discussed,and new insights gained through research efforts.In the future,integration of a local scanning probe with global macroscopic measurements in situ will provide invaluable microscopic insight into the intriguing macroscopic phenomena,while synchrotron diffractions and scanning transmission electron microscopy on more stable samples may ultimately settle the debate.

关 键 词：perovskite solar cells polarity FERROELECTRICITY first-principles calculations scanning probe photovoltaic implication 

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]