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

Bich Phuong Nguyen; Dongguen Shin; Hye Ri Jung; Juran Kim; Trang Thi Thu Nguyen; Seokhyun Yoon; Yeonjin Yi; William Jo

doi:10.1016/j.solener.2019.05.007

Phase formation and local charge transport of lead-free CH₃NH₃Sn(I_1−xBr_x)₃ (0 ≤ x ≤ 1)perovskite solar cells fabricated by solvent optimization

Bich Phuong Nguyen
, Dongguen Shin
, Hye Ri Jung
, Juran Kim
, Trang Thi Thu Nguyen
, Seokhyun Yoon
, Yeonjin Yi
, William Jo

Department of Physics

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

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(I_1−xBr_x)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(I_1−xBr_x)₃ perovskite device was carefully studied.

Original language	English
Pages (from-to)	136-144
Number of pages	9
Journal	Solar Energy
Volume	186
DOIs	https://doi.org/10.1016/j.solener.2019.05.007
State	Published - 1 Jul 2019

Bibliographical note

Publisher Copyright:
© 2019

Keywords

Conductive atomic force microscopy
Crystal growth
Lead-free perovskite
Morphology
Solvent engineering

Access to Document

10.1016/j.solener.2019.05.007

Cite this

@article{0c8f955a3b44448eb14087fe000fabfa,

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

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.",

keywords = "Conductive atomic force microscopy, Crystal growth, Lead-free perovskite, Morphology, Solvent engineering",

author = "Nguyen, \{Bich Phuong\} and Dongguen Shin and Jung, \{Hye Ri\} and Juran Kim and Nguyen, \{Trang Thi Thu\} and Seokhyun Yoon and Yeonjin Yi and William Jo",

note = "Publisher Copyright: {\textcopyright} 2019",

year = "2019",

month = jul,

day = "1",

doi = "10.1016/j.solener.2019.05.007",

language = "English",

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T1 - Phase formation and local charge transport of lead-free CH3NH3Sn(I1−xBrx)3 (0 ≤ x ≤ 1)perovskite solar cells fabricated by solvent optimization

AU - Nguyen, Bich Phuong

AU - Shin, Dongguen

AU - Jung, Hye Ri

AU - Kim, Juran

AU - Nguyen, Trang Thi Thu

AU - Yoon, Seokhyun

AU - Yi, Yeonjin

AU - Jo, William

PY - 2019/7/1

Y1 - 2019/7/1

N2 - 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.

AB - 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.

KW - Conductive atomic force microscopy

KW - Crystal growth

KW - Lead-free perovskite

KW - Morphology

KW - Solvent engineering

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DO - 10.1016/j.solener.2019.05.007

M3 - Article

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JO - Solar Energy

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