Low-temperature (75 °C) solid-state reaction enhanced by less-crystallized nanoporous PbI2films for efficient CH3NH3PbI3perovskite solar cells

doi:10.1016/j.apsusc.2017.02.057

	Low-temperature (75 °C) solid-state reaction enhanced by less-crystallized nanoporous PbI2films for efficient CH3NH3PbI3perovskite solar cells
	Zheng, Huifeng 1,2; Liu, Yangqiao 1,3; Sun, Jing 1
刊名	Applied Surface Science
	2017
卷号	405 页码:412-419
ISSN号	01694332
DOI	10.1016/j.apsusc.2017.02.057
英文摘要	Organohalide perovskite films are usually prepared with the solid-state reaction at a high temperature ≥100 °C, which causes the increase of non-radiative defects and decomposition of perovskite films. Here, we demonstrate it's feasible to prepare high-quality perovskite films with the solid-state reaction method even at a temperature of 75 °C, when enhanced by less-crystallized nanoporous PbI2(ln-PbI2) films. The replacement of compact PbI2(c-PbI2) by ln-PbI2, results in a significant improvement of crystallinity of perovskite films, besides the elimination of remnant PbI2. As a result, ln-PbI2based perovskite solar cells display much higher power conversion efficiency (PCE) and better stability. Moreover, annealing duration was found to be critical for high PCE and was optimized as 60 min. Finally, with the optimal process, the champion device displayed a PCE of 13.8% and the average PCE reached 10.1% with a satisfactory deviation. Furthermore, we found annealing at high temperature (140 °C) led to a lower PCE compared with that annealed at 75 °C, because non-radiative defects increased significantly during high-temperature annealing. This work may open up a promising avenue for preparing high-quality perovskite films with the low-temperature solid-state reaction method, which is desirable for real application. © 2017 Elsevier B.V.
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/25410]
专题	中国科学院上海硅酸盐研究所
作者单位	1.State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai; 200050, China; 2.University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing; 100049, China; 3.Suzhou Institute of SICCAS (Shanghai Institute of Ceramics, Chinese Academy of Sciences), 238 North Changchun Road, Taicang; Jiangsu Province; 215499, China
推荐引用方式 GB/T 7714	Zheng, Huifeng,Liu, Yangqiao,Sun, Jing. Low-temperature (75 °C) solid-state reaction enhanced by less-crystallized nanoporous PbI2films for efficient CH3NH3PbI3perovskite solar cells[J]. Applied Surface Science,2017,405:412-419.
APA	Zheng, Huifeng,Liu, Yangqiao,&Sun, Jing.(2017).Low-temperature (75 °C) solid-state reaction enhanced by less-crystallized nanoporous PbI2films for efficient CH3NH3PbI3perovskite solar cells.Applied Surface Science,405,412-419.
MLA	Zheng, Huifeng,et al."Low-temperature (75 °C) solid-state reaction enhanced by less-crystallized nanoporous PbI2films for efficient CH3NH3PbI3perovskite solar cells".Applied Surface Science 405(2017):412-419.