Pseudohalide-Induced Recrystallization Engineering for CH3NH3PbI3 Film and Its Application in Highly Efficient Inverted Planar Heterojunction Perovskite Solar Cells

被引：132

作者：

Dong, Hua ^{[1
,2
,3
]}

Wu, Zhaoxin ^{[1
,2
,4
]}

Xi, Jun ^{[1
,2
]}

Xu, Xiaobao ^{[3
]}

Zuo, Lijian ^{[3
]}

Lei, Ting ^{[1
,2
]}

Zhao, Xingang ^{[5
,6
]}

Zhang, Lijun ^{[5
,6
]}

Hou, Xun ^{[1
,2
]}

Jen, Alex K. -Y. ^{[3
,7
]}

机构：

[1] Xi An Jiao Tong Univ, Minist Educ, Key Lab Phys Elect & Devices, Xian 710049, Shaanxi, Peoples R China

[2] Xi An Jiao Tong Univ, Shaanxi Key Lab Informat Photon Tech, Sch Elect & Informat Engn, Xian 710049, Shaanxi, Peoples R China

[3] Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA

[4] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China

[5] Jilin Univ, Key Lab Automobile Mat MOE, Changchun 130012, Jilin, Peoples R China

[6] Jilin Univ, Coll Mat Sci & Engineer, Changchun 130012, Jilin, Peoples R China

[7] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon 999077, Hong Kong, Peoples R China

来源：

ADVANCED FUNCTIONAL MATERIALS | 2018年 / 28卷 / 02期

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

flexible solar cells; interfacial engineering; perovskite solar cells; pseudohalide; recrystallization; EFFECTIVE IONIC-RADII; PERFORMANCE; HYSTERESIS; DEPOSITION; CHEMISTRY;

D O I：

10.1002/adfm.201704836

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

High crystallinity and compactness of the active layer is essential for metal-halide perovskite solar cells. Here, a simple pseudohalide-induced film retreatment technology is developed as the passivation for preformed perovskite film. It is found that the retreatment process yields a controllable decomposition-to-recrystallization evolution of the perovskite film. Corresponding, it remarkably enlarges the grain size of the film in all directions, as well as improving the crystallinity and hindering the trap density. Meanwhile, owing to an intermediate catalytic effect of the pseudohalide compound (NH4SCN), no crystal orientation changing and no impurity introduction in the modified film. By integrating the modified perovskite film into the planar heterojunction solar cells, a champion power conversion efficiency of 19.44% with a stabilized output efficiency of 19.02% under 1 sun illumination is obtained, exhibiting a negligible current density-voltage hysteresis. Moreover, such a facile and low-temperature film retreatment approach guarantees the application in flexible devices, showing a best power conversion efficiency of 17.04%.

引用

页数：9