Controllable Introduction of Surface Defects on CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Perovskite
One of the unique characteristics of semiconductors is the strong dependence of their properties on crystal defects and doping. However, due to the species diversity and low density, it is very difficult to control the type and concentration of the defects. In perovskite materials, crystal defects a...
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MDPI AG
2022-03-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/6/1002 |
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| author | Sushu Wan Yajie Zhu Daocheng Hong Yuxi Tian |
| author_facet | Sushu Wan Yajie Zhu Daocheng Hong Yuxi Tian |
| author_sort | Sushu Wan |
| collection | DOAJ |
| description | One of the unique characteristics of semiconductors is the strong dependence of their properties on crystal defects and doping. However, due to the species diversity and low density, it is very difficult to control the type and concentration of the defects. In perovskite materials, crystal defects are randomly formed during the fast crystallization process, causing large heterogeneity of the samples. Here, in this work, we report a controllable method to introduce surface defects on CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> perovskite materials via the interaction with 1,4-benzoquinone (BQ) molecules on the gas and solid interface. After the adsorption of BQ molecules on the perovskite surface, surface defects can be generated by photoinduced chemical reactions. The concentration of the defects can thus be controlled by precisely regulating the laser irradiation time. The concentration of the defects can be characterized by a gradually decreased PL intensity and lifetime and was found to influence the atmospheric response and the subsequent acetone-induced degradation of the materials. These results demonstrate that crystal defects in perovskite materials can be controllably introduced, which provides a possible way to fully understand the correlation between the nature and chemical structure of these defects. |
| first_indexed | 2024-03-09T13:06:41Z |
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| id | doaj.art-69ec0e01718046d4900b5ba0f083ef27 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T13:06:41Z |
| publishDate | 2022-03-01 |
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| spelling | doaj.art-69ec0e01718046d4900b5ba0f083ef272023-11-30T21:46:50ZengMDPI AGNanomaterials2079-49912022-03-01126100210.3390/nano12061002Controllable Introduction of Surface Defects on CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> PerovskiteSushu Wan0Yajie Zhu1Daocheng Hong2Yuxi Tian3Key Laboratory of Mesoscopic Chemistry of MOE, Jiangsu Key Laboratory of Vehicle Emissions Control, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, ChinaKey Laboratory of Mesoscopic Chemistry of MOE, Jiangsu Key Laboratory of Vehicle Emissions Control, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, ChinaKey Laboratory of Mesoscopic Chemistry of MOE, Jiangsu Key Laboratory of Vehicle Emissions Control, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, ChinaKey Laboratory of Mesoscopic Chemistry of MOE, Jiangsu Key Laboratory of Vehicle Emissions Control, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, ChinaOne of the unique characteristics of semiconductors is the strong dependence of their properties on crystal defects and doping. However, due to the species diversity and low density, it is very difficult to control the type and concentration of the defects. In perovskite materials, crystal defects are randomly formed during the fast crystallization process, causing large heterogeneity of the samples. Here, in this work, we report a controllable method to introduce surface defects on CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> perovskite materials via the interaction with 1,4-benzoquinone (BQ) molecules on the gas and solid interface. After the adsorption of BQ molecules on the perovskite surface, surface defects can be generated by photoinduced chemical reactions. The concentration of the defects can thus be controlled by precisely regulating the laser irradiation time. The concentration of the defects can be characterized by a gradually decreased PL intensity and lifetime and was found to influence the atmospheric response and the subsequent acetone-induced degradation of the materials. These results demonstrate that crystal defects in perovskite materials can be controllably introduced, which provides a possible way to fully understand the correlation between the nature and chemical structure of these defects.https://www.mdpi.com/2079-4991/12/6/1002lead halide perovskitepolycrystalline thin filmsdefect modificationdefect concentrationoptical microscopy |
| spellingShingle | Sushu Wan Yajie Zhu Daocheng Hong Yuxi Tian Controllable Introduction of Surface Defects on CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Perovskite Nanomaterials lead halide perovskite polycrystalline thin films defect modification defect concentration optical microscopy |
| title | Controllable Introduction of Surface Defects on CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Perovskite |
| title_full | Controllable Introduction of Surface Defects on CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Perovskite |
| title_fullStr | Controllable Introduction of Surface Defects on CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Perovskite |
| title_full_unstemmed | Controllable Introduction of Surface Defects on CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Perovskite |
| title_short | Controllable Introduction of Surface Defects on CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Perovskite |
| title_sort | controllable introduction of surface defects on ch sub 3 sub nh sub 3 sub pbi sub 3 sub perovskite |
| topic | lead halide perovskite polycrystalline thin films defect modification defect concentration optical microscopy |
| url | https://www.mdpi.com/2079-4991/12/6/1002 |
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