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DOI	10.1039/c8ee00956b
	Slow surface passivation and crystal relaxation with additives to improve device performance and durability for tin-based perovskite solar cells
	Jokar E.; Chien C.-H.; Fathi A.; Rameez M.; Chang Y.-H.; Diau E.W.-G.
发表日期	2018
ISSN	17545692
起始页码	2353
结束页码	2362
卷号	11 期号:9
英文摘要	We investigated the doping effect of bulky organic cations with ethylenediammonium diiodide (EDAI2) and butylammonium iodide (BAI) as additives to passivate surface defects, to control the film morphology and to improve the crystallinity for inverted planar FASnI3 perovskite solar cells. The addition of BAI altered significantly the orientation of crystal growth and improved the connectivity of the crystal grains, but the existence of pinholes in the surface of the pristine FASnI3 films was unavoidable; this effect impeded further improvement of the device performance (PCE 5.5%), which is nevertheless superior to that of a pristine FASnI3 film (PCE 4.0%). The addition of EDAI2 had the effect of curing the pinhole problem, passivating the surface defect states, preventing Sn2+/Sn4+ oxidation and inducing slow relaxation of the crystal structure. In the presence of the EDAI2 additive (1%), the FASnI3 device attained the best initial efficiency, 7.4%, and the device performance continuously increased as a function of duration of storage; the maximum PCE, 8.9%, was obtained for a device stored in a glove box for over 1400 h with only slight degradation for storage beyond 2000 h. The observed slow passivation of surface defects and relaxation of crystal strain were verified with X-ray diffraction, X-ray photoelectron spectroscopy and photoluminescence decay techniques. © 2018 The Royal Society of Chemistry.
英文关键词	Passivation; Perovskite; Perovskite solar cells; Photodegradation; Semiconductor doping; Solar cells; Surface defects; Tin; X ray photoelectron spectroscopy; Crystal relaxation; Crystal strains; Device performance; Initial efficiency; Photoluminescence decay; Slow relaxations; Surface defect state; Surface passivation; Crystal orientation; additive; crystal structure; crystallinity; durability; fuel cell; instrumentation; performance assessment; perovskite
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190147
作者单位	Department of Applied Chemistry, Institute of Molecular Science, National Chiao Tung University, 1001 Ta-Hsueh Rd., Hsinchu, 30010, Taiwan; Center for Emergent Functional Matter Science, National Chiao Tung University, 1001 Ta-Hsueh Rd., Hsinchu, 30010, Taiwan
推荐引用方式 GB/T 7714	Jokar E.,Chien C.-H.,Fathi A.,et al. Slow surface passivation and crystal relaxation with additives to improve device performance and durability for tin-based perovskite solar cells[J],2018,11(9).
APA	Jokar E.,Chien C.-H.,Fathi A.,Rameez M.,Chang Y.-H.,&Diau E.W.-G..(2018).Slow surface passivation and crystal relaxation with additives to improve device performance and durability for tin-based perovskite solar cells.Energy & Environmental Science,11(9).
MLA	Jokar E.,et al."Slow surface passivation and crystal relaxation with additives to improve device performance and durability for tin-based perovskite solar cells".Energy & Environmental Science 11.9(2018).