CAS OpenIR  > 中科院上海应用物理研究所2011-2020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
2020
Source PublicationACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
Volume12Issue:37Pages:42369-42377
Subtype期刊论文
AbstractMixed 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.
KeywordSOLAR-CELLS TRIHALIDE PEROVSKITE INDUCED DEGRADATION EFFICIENCY TOLERANCE STABILITY MECHANISM MIGRATION IMPACT
DOI10.1021/acsami.0c11696
Indexed BySCI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/32947
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.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, Key Lab Interfacial Phys & Technol, Shanghai Inst Appl Phys, Shanghai 201204, Peoples R China
3.Chinese Acad Sci, Shanghai Synchrotron Radiat Facil, Zhangjiang Lab, Shanghai 201204, Peoples R China
Recommended Citation
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.
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