Formation of Hybrid Perovskite Tin Iodide Single Crystals by Top-Seeded Solution Growth

Hybrid perovskites have generated a great deal of interest because of their potential in photovoltaic applications. However, the toxicity of lead means that there is interest in finding a nontoxic substitute. Bulk single crystals of both cubic CH3NH3SnI3 and CH(NH2)2SnI3 were obtained by using the t...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2016-03, Vol.55 (10), p.3447-3450
Main Authors: Dang, Yangyang, Zhou, Yian, Liu, Xiaolong, Ju, Dianxing, Xia, Shengqing, Xia, Haibing, Tao, Xutang
Format: Article
Language:English
Subjects:
Atmosphere
band gaps
crystal growth
Crystals
Lead
Perovskites
Photovoltaics
semiconductors
Single crystals
Thermal properties
Thermodynamic properties
Tin
Toxicity
Water pollution effects
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Summary:Hybrid perovskites have generated a great deal of interest because of their potential in photovoltaic applications. However, the toxicity of lead means that there is interest in finding a nontoxic substitute. Bulk single crystals of both cubic CH3NH3SnI3 and CH(NH2)2SnI3 were obtained by using the top‐seeded solution growth method under an ambient atmosphere. Structural refinement, band gap, thermal properties, and XPS measurements of CH3NH3SnI3 and CH(NH2)2SnI3 single crystals are also reported in detail. These results should pave the way for further applications of CH3NH3SnI3 and CH(NH2)2SnI3. Unleaded: Bulk single crystals of lead‐free perovskites CH3NH3SnI3 and CH(NH2)2SnI3 can be obtained by top‐seeded solution growth under an ambient atmosphere. CH3NH3SnI3 acts as a p‐type semiconductor, while CH(NH2)2SnI3 behaves as an n‐type semiconductor. CH(NH2)2SnI3 was found to be more stable than CH3NH3SnI3 after storage under an ambient atmosphere for one month.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201511792