Unveiling the operation mechanism of layered perovskite solar cells

被引：291

作者：

Lin, Yun ^{[1
]}

Fang, Yanjun ^{[1
]}

Zhao, Jingjing ^{[1
]}

Shao, Yuchuan ^{[2
]}

Stuard, Samuel J. ^{[3
]}

Nahid, Masrur Morshed ^{[3
]}

Ade, Harald ^{[3
]}

Wang, Qi ^{[2
]}

Shield, Jeffrey E. ^{[1
,4
]}

Zhou, Ninghao ^{[5
]}

Moran, Andrew M. ^{[5
]}

Huang, Jinsong ^{[1
,2
]}

机构：

[1] Univ Nebraska, Dept Mech & Mat Engn, Lincoln, NE 68588 USA

[2] Univ N Carolina, Dept Appl Phys Sci, Chapel Hill, NC 27599 USA

[3] North Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA

[4] Univ Nebraska, Nebraska Ctr Mat & Nanosci, Lincoln, NE 68588 USA

[5] Univ N Carolina, Dept Chem, Chapel Hill, NC 27599 USA

来源：

NATURE COMMUNICATIONS | 2019年 / 10卷 / 1期

基金：

美国国家科学基金会;

关键词：

SUPPRESSED ION MIGRATION; ELECTRON; TRANSPORT; LENGTHS;

D O I：

10.1038/s41467-019-08958-9

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Layered perovskites have been shown to improve the stability of perovskite solar cells while its operation mechanism remains unclear. Here we investigate the process for the conversion of light to electrical current in high performance layered perovskite solar cells by examining its real morphology. The layered perovskite films in this study are found to be a mixture of layered and three dimensional (3D)-like phases with phase separations at micrometer and nanometer scale in both vertical and lateral directions. This phase separation is explained by the surface initiated crystallization process and the competition of the crystallization between 3D-like and layered perovskites. We further propose that the working mechanisms of the layered perovskite solar cells involve energy transfer from layered to 3D-like perovskite network. The impact of morphology on efficiency and stability of the hot-cast layered perovskite solar cells are also discussed to provide guidelines for the future improvement.

引用

页数：11

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