Phase formation and local charge transport of lead-free CH3NH3Sn(I1-xBrx)(3) (0 <= x <= 1) perovskite solar cells fabricated by solvent optimization
- 주제(키워드) Lead-free perovskite , Morphology , Crystal growth , Solvent engineering , Conductive atomic force microscopy
- 주제(기타) Energy & Fuels
- 설명문(일반) [Bich Phuong Nguyen; Jung, Hye Ri; Kim, Juran; Trang Thi Thu Nguyen; Yoon, Seokhyun; Jo, William] Ewha Womans Univ, Dept Phys, Seoul 03760, South Korea; [Bich Phuong Nguyen; Jung, Hye Ri; Kim, Juran; Trang Thi Thu Nguyen; Yoon, Seokhyun; Jo, William] Ewha Womans Univ, New & Renewable Energy Res Ctr, Seoul 03760, South Korea; [Shin, Dongguen; Yi, Yeonjin] Yonsei Univ, Inst Phys & Appl Phys, Seoul 03722, South Korea
- 등재 SCIE, SCOPUS
- 발행기관 PERGAMON-ELSEVIER SCIENCE LTD
- 발행년도 2019
- URI http://www.dcollection.net/handler/ewha/000000159938
- 본문언어 영어
- Published As http://dx.doi.org/10.1016/j.solener.2019.05.007
초록/요약
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 MASnI(3) 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 MASnI(3) (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.
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