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Phase formation and local charge transport of lead-free CH3NH3Sn(I1−xBrx)3 (0 ≤ x ≤ 1)perovskite solar cells fabricated by solvent optimization

Title
Phase formation and local charge transport of lead-free CH3NH3Sn(I1−xBrx)3 (0 ≤ x ≤ 1)perovskite solar cells fabricated by solvent optimization
Authors
Nguyen B.P.Shin D.Jung H.R.Kim J.Nguyen T.T.T.Yoon S.Yi Y.Jo W.
Ewha Authors
조윌렴윤석현
SCOPUS Author ID
조윌렴scopus; 윤석현scopus
Issue Date
2019
Journal Title
Solar Energy
ISSN
0038-092XJCR Link
Citation
Solar Energy vol. 186, pp. 136 - 144
Keywords
Conductive atomic force microscopyCrystal growthLead-free perovskiteMorphologySolvent engineering
Publisher
Elsevier Ltd
Indexed
SCIE; SCOPUS WOS scopus
Document Type
Article
Abstract
The perovskite layer is the most crucial factor for the high performance tin-based perovskite. Herein, we investigate the effect of solvent on the morphology of perovskite films systematically. Dimethyl sulfoxide (DMSO)has been adopted as a high boiling point combined with the commonly used N,N-dimethylformamide (DMF)to control the rapid nucleation and retarding crystal growth. A pinhole-free MASnI3 perovskite film with dense and large grains is obtained. By optimizing the solvent composition, multiple tin-based mixed iodine and bromine perovskite solar cells (MASn(I1−xBrx)3 0 ≤ x ≤ 1)were fabricated. The best photoconversion cell efficiency was obtained at x = 0.67, which yields to 3.20% compared to the original MASnI3 (1.17%)due to the benefit band level alignment. The conductivity and the stability of the MASn(I1−xBrx)3 perovskite device was carefully studied. © 2019
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DOI
10.1016/j.solener.2019.05.007
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자연과학대학 > 물리학전공 > Journal papers
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