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 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | 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. |
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ISSN: | 2046-2069 2046-2069 |
DOI: | 10.1039/c4ra16253f |