Negative thermal quenching of photoluminescence in a copper–organic framework emitter
| Autor: | Majumdar Devashis, Yusong Wang, Dayu Wu, Ting Wu, Shenlong Jiang, Xiaoling Wang, Pabitra Narayan Samanta, Wei Huang, Jerzy Leszczynski, Xiangwei Gu, Qun Zhang, Jipeng Li, Yangbin Xie |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Photoluminescence chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Catalysis Delocalized electron Materials Chemistry Common emitter Diode business.industry Metals and Alloys General Chemistry 021001 nanoscience & nanotechnology Fluorescence Copper 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Semiconductor chemistry Chemical physics Ceramics and Composites 0210 nano-technology business Thermal quenching |
| Zdroj: | Chemical Communications. 56:12057-12060 |
| ISSN: | 1364-548X 1359-7345 |
| DOI: | 10.1039/d0cc04788k |
| Popis: | Negative thermal quenching (NTQ), an abnormal phenomenon that the intensity of photoluminescence (PL) increases with increasing temperature, has essentially been restricted to either bulk semiconductors or very low temperatures. Here, we report a delayed fluorescence copper-organic framework exhibiting negative thermal quenching (NTQ) of photoluminescence, which is driven by the fluctuation between the localized and delocalized form of its imidazole ligand. The process is completely reversible on cooling/heating cycles. This study opens a new avenue to explore the electronically switchable NTQ effect in coordination networks and further to develop the NTQ-based light-emitting diodes. |
| Databáze: | OpenAIRE |
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