A promising alternative solvent of perovskite to induce rapid crystallization for high-efficiency photovoltaic devices

As solar cell structures based on planar heterojunctions have already demonstrated very impressive advances in cost-effectiveness and performance, many different solvents are being developed and gradually adopted for high-performance inorganic-organic hybrid perovskite solar cells. Here, we introduc...

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Veröffentlicht in:RSC advances 2015-01, Vol.5 (26), p.2521-2529
Hauptverfasser: Lv, Minghang, Dong, Xu, Fang, Xiang, Lin, Bencai, Zhang, Shuai, Ding, Jianning, Yuan, Ningyi
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container_end_page 2529
container_issue 26
container_start_page 2521
container_title RSC advances
container_volume 5
creator Lv, Minghang
Dong, Xu
Fang, Xiang
Lin, Bencai
Zhang, Shuai
Ding, Jianning
Yuan, Ningyi
description As solar cell structures based on planar heterojunctions have already demonstrated very impressive advances in cost-effectiveness and performance, many different solvents are being developed and gradually adopted for high-performance inorganic-organic hybrid perovskite solar cells. Here, we introduce a simple planar cell configuration with layers prepared in a fully solution-based process, in which dimethylacetamide (DMAC) serves as an effective precursor solvent that is comparable with N , N -dimethylformamide (DMF). The use of DMAC leads to a smooth and dense perovskite film via one-step deposition, whose ideal morphology enables solar cells to obtain a high power-conversion efficiency of 15.12%. We also studied the effect of different solvents through a computation of the stabilization energy between PbI 2 , CH 3 NH 3 I, and solvent molecules. These results offer insight into the promising directions for the development of solvent engineering. The DMAC-based deposition-crystallization method allows control over the dynamics of CH 3 NH 3 PbI 3 grain growth for the realization of high efficiency devices.
doi_str_mv 10.1039/c4ra16253f
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source Royal Society Of Chemistry Journals
subjects Crystallization
Deposition
Perovskites
Photovoltaic cells
Precursors
Solar cells
Solvents
Stabilization
title A promising alternative solvent of perovskite to induce rapid crystallization for high-efficiency photovoltaic devices
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