Effects of Zn2+ ion doping on hybrid perovskite crystallization and photovoltaic performance of solar cells

被引：30
作者：
Que, Meidan [1 ]
Chen, Wei [1 ]
Chen, Peng [1 ]
Liu, Jie [1 ]
Yi, Xingtian [1 ]
Gao, Bowen [2 ]
Qu, Wenxiu [1 ]
机构：
[1] Xi An Jiao Tong Univ, Elect Mat Res Lab, Int Ctr Dielect Res,Sch Elect & Informat Engn, Key Lab,Minist Educ,Shaanxi Engn Res Ctr Adv Ener, Xian 710049, Shaanxi, Peoples R China
[2] Taishan Univ, Sch Machinery & Architectural Engn, Tai An 271021, Shandong, Peoples R China
来源：
CHEMICAL PHYSICS | 2019年 / 517卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Perovskite film; Lattice shrink; Micro-strain; Power conversion efficiency; EFFICIENT; RECOMBINATION; PASSIVATION; DEPOSITION; MORPHOLOGY; STABILITY; GROWTH; FILMS; RADII;
D O I：
10.1016/j.chemphys.2018.09.032
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
To achieve a reproducible perovskite film with full surface coverage, Zn2+ ions are introduced to partially replace Pb2+ ions in this work. Results indicate that the crystallization and formation of CH3NH3Pb1-xZnxI3 film with micrometer grain size could be changed by the micro-strain for lattice shrink. The bandgap and optical properties of perovskite films are improved due to trace amounts of Zn2+ ion dopant. More importantly, the solar cell device based on the Zn-doped perovskite film shows an increment in photocurrent of 21.13 mA cm(-2) and power conversion efficiency (PCE) of 16.6%. Electrochemical impedance spectroscopy (EIS) measurements reflect that the charge recombination resistance and charge accumulation capacitance of devices based on MAPb(0.98)Zn(0.02)I(3) film are lower than that of the control device. However, present results also implied that MAPb(1-x)Zn(x)I(3) films are still necessary to be extensively developed and optimized for further enhancing the device photovoltaic performance.
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页码：80 / 84
页数：5
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