文献详情
Reduced Defects of MAPbI(3) Thin Films Treated by FAI for High-Performance Planar Perovskite Solar Cells
文献类型：期刊
通讯作者：Mu, C (reprint author), Renmin Univ China, Dept Chem, Beijing 100872, Peoples R China.; Xu, DS (reprint author), Peking Univ, Coll Chem & Mol Engn, Beijing Natl Lab Mol Sci, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100871, Peoples R China.
期刊名称：ADVANCED FUNCTIONAL MATERIALS影响因子和分区
年：2019
卷：29
期：7
ISSN：1616-301X
关键词：defect; open-circuit voltage decay; perovskite solar cell; post-treatment; time-resolved charge extraction
所属部门：化学系
摘要：Organolead trihalide perovskite films with a large grain size and excellent surface morphology are favored to good-performance solar cells. However, interstitial and antisite defects related trap-states are originated unavoidably on the surfaces of the perovskite films prepared by the solution deposition procedures. The development of post-growth treatment of defective films is an attractive method to reduce the defects to form good-quality perovskite layers. Herein, a post-treatment tactic is d ...More
Organolead trihalide perovskite films with a large grain size and excellent surface morphology are favored to good-performance solar cells. However, interstitial and antisite defects related trap-states are originated unavoidably on the surfaces of the perovskite films prepared by the solution deposition procedures. The development of post-growth treatment of defective films is an attractive method to reduce the defects to form good-quality perovskite layers. Herein, a post-treatment tactic is developed to optimize the perovskite crystallization by treating the surface of the one-step deposited CH3NH3PbI3 (MAPbI(3)) using formamidinium iodide (FAI). Charge carrier kinetics investigated via time-resolved photoluminescent, open-circuit photovoltage decay, and time-resolved charge extraction indicate that FAI post-treatment will boost the perovskite crystalline quality, and further result in the reduction of the defects or trap-states in the perovskite films. The photovoltaic devices by FAI treatment show much improved performance in comparison to the controlled solar cell. As a result, a champion solar cell with the best power conversion efficiency of 20.25% is obtained due to a noticeable improvement in fill factor. This finding exhibits a simple procedure to passivate the perovskite layer via regulating the crystallization and decreasing defect density. ...Hide

DOI：10.1002/adfm.201805810
百度学术：Reduced Defects of MAPbI(3) Thin Films Treated by FAI for High-Performance Planar Perovskite Solar Cells
语言：外文
被引频次：10
人气指数：2
浏览次数：2
基金：National Natural Science Foundation of ChinaNational Natural Science Foundation of China [21773308]; National Key R&D Program of China [2018YFA0208701]; Ministry of Science and Technology of China (973 project)Ministry of Science and Technology, ChinaNational Basic Research Program of China [2014CB23930, 2013CB9326013]
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