Evidence for Ferroelectricity of All-Inorganic Perovskite CsPbBr3 Quantum Dots
The combination of ferroelectric-optical properties in halide perovskites has attracted tremendous interess because of its potential for optoelectronic and energy applications. However, very few reports focus on the ferroelectricity of all-inorganic halide perovskites quantum dots. Herein, we report a excellent ferroelectricity in CsPbBr3 quantum dots (QDs) with a saturation polarization of 0.25 μC/cm2. Differential scanning calorimetry, X-ray diffraction, and transmission electronic microscopy revealed that the mechanism of ferroelectric-paraelectric switching of CsPbBr3 QDs can be attributed to the phase transition from cubic phase (Pm3̅m) to the orthorhombic phase (Pna21). In the orthorhombic CsPbBr3, the distortion of octahedral [PbBr6]4- structural units and the off-center Cs+ generated the slightly separated centers of positive charge and negative charge, resulting in the ferroelectric properties. The variable-temperature emission spectrum from 328 to 78 K exhibits green luminescence and a gradual red shift due to the phase transition. This finding opens up an avenue to explore the ferroelectric-optical properties of inorganolead halide perovskites for high-performance multifunctional materials.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2020 |
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| Erschienen: |
2020 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:142 |
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| Enthalten in: |
Journal of the American Chemical Society - 142(2020), 7 vom: 19. Feb., Seite 3316-3320 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Li, Xia [VerfasserIn] |
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| Links: |
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| Themen: |
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| Anmerkungen: |
Date Revised 19.02.2020 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1021/jacs.9b12254 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM305988972 |
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| 245 | 1 | 0 | |a Evidence for Ferroelectricity of All-Inorganic Perovskite CsPbBr3 Quantum Dots |
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| 520 | |a The combination of ferroelectric-optical properties in halide perovskites has attracted tremendous interess because of its potential for optoelectronic and energy applications. However, very few reports focus on the ferroelectricity of all-inorganic halide perovskites quantum dots. Herein, we report a excellent ferroelectricity in CsPbBr3 quantum dots (QDs) with a saturation polarization of 0.25 μC/cm2. Differential scanning calorimetry, X-ray diffraction, and transmission electronic microscopy revealed that the mechanism of ferroelectric-paraelectric switching of CsPbBr3 QDs can be attributed to the phase transition from cubic phase (Pm3̅m) to the orthorhombic phase (Pna21). In the orthorhombic CsPbBr3, the distortion of octahedral [PbBr6]4- structural units and the off-center Cs+ generated the slightly separated centers of positive charge and negative charge, resulting in the ferroelectric properties. The variable-temperature emission spectrum from 328 to 78 K exhibits green luminescence and a gradual red shift due to the phase transition. This finding opens up an avenue to explore the ferroelectric-optical properties of inorganolead halide perovskites for high-performance multifunctional materials | ||
| 650 | 4 | |a Journal Article | |
| 700 | 1 | |a Chen, Shaoqing |e verfasserin |4 aut | |
| 700 | 1 | |a Liu, Peng-Fei |e verfasserin |4 aut | |
| 700 | 1 | |a Zhang, Yuelan |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Yan |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Hsing-Lin |e verfasserin |4 aut | |
| 700 | 1 | |a Yuan, Hongming |e verfasserin |4 aut | |
| 700 | 1 | |a Feng, Shouhua |e verfasserin |4 aut | |
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