Highly Crystalline Perovskite-Based Photovoltaics via Two-Dimensional Liquid Cage Annealing Strategy

被引：37

作者：

Lee, Jong Woo ^{[1
]}

Yu, Haejun ^{[2
]}

Lee, Kisu ^{[2
]}

Bae, Sohyeon ^{[1
]}

Kim, Jungwon ^{[2
]}

Han, Gi Rim ^{[1
]}

Hwang, Doyk ^{[1
]}

Kim, Seong Keun ^{[1
]}

Jang, Jyongsik ^{[2
]}

机构：

[1] Seoul Natl Univ, Dept Chem, Seoul 08826, South Korea

[2] Seoul Natl Univ, WCU, Program Chem Convergence Energy & Environm C2E2, Sch Chem & Biol Engn, Seoul 08826, South Korea

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2019年 / 141卷 / 14期

基金：

新加坡国家研究基金会;

关键词：

SOLAR-CELLS; GRAIN-BOUNDARIES; HIGH-EFFICIENCY; PERFORMANCE; MORPHOLOGY; ABSORBER; GROWTH; FILMS;

D O I：

10.1021/jacs.8b13423

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Rendering a high crystalline perovskite film is integral to achieve superior performance of perovskite solar cells (PSCs). Here, we established a two-dimensional liquid cage annealing system, a unique methodology for remarkable enhancement in perovskite crystallinity. During thermal annealing for crystallization, wet-perovskite films were suffocated by perfluorodecalin with distinctively low polarity, nontoxic, and chemically inert characteristics. This annealing strategy facilitated enlargement of perovskite grain and diminution in the number of trap states. The simulation results, annealing time, and temperature experiments supported that the prolonged diffusion length of precursor ions attributed to the increase of perovskite grains. Consequently, without any complicated handling, the performance of perovskite photovoltaics was remarkably improved, and the monolithic grains which directly connected the lower and upper electrode attenuated hysteresis.

引用

页码：5808 / 5814

页数：7

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