NDLI: Hydrochloric acid accelerated formation of planar CH3NH3PbI3 perovskite with high humidity tolerance

Content Provider	Royal Society of Chemistry (RSC)
Author	Li, Ge Zhang, Taiyang Zhao, Yixin
Copyright Year	2015
Abstract	We demonstrate high humidity tolerant one-step and sequential deposition methods to fabricate high quality planar CH3NH3PbI3 perovskite films with the assistance of HCl. The addition of stoichiometric HCl into PbI2 precursor solution from 33 wt% hydrochloric acid leads to the formation of a novel HCl·PbI2 precursor film, which can be easily thermally decomposed back into PbI2. This novel intermediate planar HCl·PbI2 precursor film can be completely converted into a compact planar MAPbI3 film within only 10 s at room temperature via sequential deposition. In another novel one step method the precursor solution of PbI2 + MAI + HCl obtained by adding stoichiometric HCl into regular PbI2 + MAI precursor solution was used to fabricate a very smooth planar MAPbI3 film by just spin coating. Both the one step and sequential deposition methods can be used to fabricate high quality planar perovskite films in a hood under ambient conditions with up to 60% humidity level for high efficiency planar perovskite solar cells.
Starting Page	19674
Ending Page	19678
Page Count	5
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	3
Issue Number	39
Journal	Journal of Materials Chemistry A
DOI	10.1039/c5ta06172e
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Humidity Perovskite Hydrochloric acid Stoichiometry Lead(II) iodide Acid Spin coating
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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