Interaction of the Cation and Vacancy in Hybrid Perovskites Induced by Light Illumination

doi:10.1021/acsami.0c11696

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Interaction of the Cation and Vacancy in Hybrid Perovskites Induced by Light Illumination
	Lu, LY ; Shen, KC ; Wang, JK ; Su, ZH ; Li, YQ ; Chen, L ; Luo, YX ; Song, F ; Gao, XY ; Tang, JX
刊名	ACS APPLIED MATERIALS & INTERFACES
	2020
卷号	12 期号:37 页码:42369-42377
关键词	SOLAR-CELLS TRIHALIDE PEROVSKITE INDUCED DEGRADATION EFFICIENCY TOLERANCE STABILITY MECHANISM MIGRATION IMPACT
ISSN号	1944-8244
DOI	10.1021/acsami.0c11696
文献子类	期刊论文
英文摘要	Mixed A-site engineering is an emerging strategy to overcome the difficulties in realizing high-quality perovskite films together with high ambient stability. Particularly, the alpha-FACsPbI(3)-based hybrid perovskites have been considered as a promising candidate for solar cell applications. However, the degradation mechanism of alpha-FACsPbI(3) hybrid perovskites induced by light illumination remains unclear. Here, the illumination-caused instability of alpha-FACsPbI(3) hybrid perovskites is investigated using various surface detection technologies, including photoelectron spectroscopy, scanning electron microscopy, and grazing incidence X-ray diffraction. The experimental findings reveal that the A-site vacancies arise from the migration of Cs+ cations from the perovskite surface into the bulk under light illumination, while their content is dependent on the light energy. The visible light enlarges the crystal lattice on the perovskite surface, leading to the Cs+ cation migration along with the lattice distortion of the PbI64- octahedron and phase separation. However, the ultraviolet light further causes a stronger interaction between FA(+) and [PbI6](4-), leading to the partial decomposition of [PbI6](4-) into Pb-0 and I-. These results enrich the photodegradation mechanism, guiding the design of efficient and stable perovskite solar cells through surface passivation to suppress the Cs+ cation migration and to increase the octahedron dissociation energy.
语种	英语
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/32947]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Suzhou 215123, Jiangsu, Peoples R China 2.Chinese Acad Sci, Shanghai Synchrotron Radiat Facil, Zhangjiang Lab, Shanghai 201204, Peoples R China 3.Chinese Acad Sci, Key Lab Interfacial Phys & Technol, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China
推荐引用方式 GB/T 7714	Lu, LY,Shen, KC,Wang, JK,et al. Interaction of the Cation and Vacancy in Hybrid Perovskites Induced by Light Illumination[J]. ACS APPLIED MATERIALS & INTERFACES,2020,12(37):42369-42377.
APA	Lu, LY.,Shen, KC.,Wang, JK.,Su, ZH.,Li, YQ.,...&Tang, JX.(2020).Interaction of the Cation and Vacancy in Hybrid Perovskites Induced by Light Illumination.ACS APPLIED MATERIALS & INTERFACES,12(37),42369-42377.
MLA	Lu, LY,et al."Interaction of the Cation and Vacancy in Hybrid Perovskites Induced by Light Illumination".ACS APPLIED MATERIALS & INTERFACES 12.37(2020):42369-42377.