2014
DOI: 10.1002/ange.201405334
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Abstract: Thin‐film photovoltaics based on alkylammonium lead iodide perovskite light absorbers have recently emerged as a promising low‐cost solar energy harvesting technology. To date, the perovskite layer in these efficient solar cells has generally been fabricated by either vapor deposition or a two‐step sequential deposition process. We report that flat, uniform thin films of this material can be deposited by a one‐step, solvent‐induced, fast crystallization method involving spin‐coating of a DMF solution of CH3NH3… Show more

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Cited by 839 publications
(813 citation statements)
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“…Thereafter these solutions were used to prepare thin films via the fast crystallization deposition method 21 (for more details of perovskite films formation see Experimental Section). To evaluate the quality of thin films we characterized their morphological properties.…”
Section: Resultsmentioning
confidence: 99%
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“…Thereafter these solutions were used to prepare thin films via the fast crystallization deposition method 21 (for more details of perovskite films formation see Experimental Section). To evaluate the quality of thin films we characterized their morphological properties.…”
Section: Resultsmentioning
confidence: 99%
“…17,18 However, it is challenging to obtain highly crystalline perovskite films with full surface coverage using this procedure. 19 Thus, several modifications including solvent engineering, 20 fast deposition-crystallization 21 and the addition of different additives [22][23][24][25][26] have been developed. These complex preparation methods are sensitive to small changes in the precursors composition and thus reproducibility remains an issue for improving MAPbI 3 films 24 towards the highest performing multication perovskites.…”
Section: Introductionmentioning
confidence: 99%
“…[10,11] Jeon et al and Xiao et al almost simultaneously reported that adding an antisolvent on top of the wet precursor film during spin-coating induces fast crystallization. [12,21] In a basic approach, Xiao et al used an equimolar solution of MAI and PbI 2 in DMF, and tested the influence of a variety of antisolvents like chlorobenzene (CB), benzene, xylene, toluene, isopropylalcohol (IPA), and chloroform. The use of the antisolvent promotes fast nucleation, which results in micron-sized crystals and PCEs close to 14% using a planar device architecture.…”
Section: One-step (Solvent Engineering)mentioning
confidence: 99%
“…The use of the antisolvent promotes fast nucleation, which results in micron-sized crystals and PCEs close to 14% using a planar device architecture. [21] Jeon et al, on the other hand, dissolved their precursors in a mixture of γ-butyrolactone (GBL) and DMSO, and used toluene as the antisolvent, and thereby achieved a certified efficiency of 16.2% for an optimized mixed-MAPb(I 1−x Br x ) 3 perovskite on mesoporous TiO 2 , which was a record PCE at that time. [12] Besides the influence of the solvent on the crystallization, the choice of the precursor species and their concentration has shown a strong impact.…”
Section: One-step (Solvent Engineering)mentioning
confidence: 99%
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