Title |
Transition from the Tetragonal to Cubic Phase of Organohalide Perovskite: The Role of Chlorine in Crystal Formation of CH3NH3PbI3 on TiO2 Substrates
|
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Published in |
The Journal of Physical Chemistry Letters, October 2015
|
DOI | 10.1021/acs.jpclett.5b01682 |
Pubmed ID | |
Authors |
Qiong Wang, Miaoqiang Lyu, Meng Zhang, Jung-Ho Yun, Hongjun Chen, Lianzhou Wang |
Abstract |
The role of chlorine in the superior electronic property and photovoltaic performance of CH3NH3PbI(3-x)Clx perovskite has attracted recent research attention. Here, we study the impact of chlorine in the perspective of the crystal structure of the perovskite layer, which can provide important understanding of its excellent charge mobility and extended lifetimes. In particular, we find that in the presence of chlorine (PbCl2 or CH3NH3Cl), when CH3NH3PbI3 films are deposited on a TiO2 mesoporous layer instead of a planar TiO2 substrate, a stable cubic phase rather than the commonly observed tetragonal phase is formed in CH3NH3PbI3 perovskite at room temperature. The relative peak intensity of two major facets of cubic CH3NH3PbI3 crystals, (100)C and (200)C facets, can also be easily tuned, depending on the film thickness. Furthermore, compared with pristine CH3NH3PbI3 perovskite films, in the presence of chlorine, CH3NH3PbI3 crystals grown on planar substrates exhibit strong preferred orientations on (110)T and (220)T facets. |
X Demographics
Geographical breakdown
Country | Count | As % |
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Unknown | 1 | 100% |
Demographic breakdown
Type | Count | As % |
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Members of the public | 1 | 100% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
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United States | 4 | 2% |
Hungary | 1 | <1% |
Finland | 1 | <1% |
Iran, Islamic Republic of | 1 | <1% |
United Kingdom | 1 | <1% |
China | 1 | <1% |
Belgium | 1 | <1% |
Unknown | 155 | 94% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Ph. D. Student | 56 | 34% |
Researcher | 24 | 15% |
Student > Master | 24 | 15% |
Professor > Associate Professor | 9 | 5% |
Student > Bachelor | 8 | 5% |
Other | 26 | 16% |
Unknown | 18 | 11% |
Readers by discipline | Count | As % |
---|---|---|
Materials Science | 54 | 33% |
Chemistry | 33 | 20% |
Physics and Astronomy | 26 | 16% |
Engineering | 14 | 8% |
Energy | 8 | 5% |
Other | 5 | 3% |
Unknown | 25 | 15% |