Abstract
Ultra-broadband near-infrared (NIR) luminescent materials are the most important component of NIR light-emitting devices (LED) and are crucial for their performance in sensing applications. A major challenge is to design novel NIR luminescent materials to replace the traditional Cr3+-doped systems. We report an all-inorganic bismuth halide perovskite Cs2AgBiCl6 single crystal that achieves efficient broadband NIR emission by introducing Na ions. Experiments and density functional theory (DFT) calculations show that the NIR emission originates from self-trapped excitons (STE) emission, which can be enhanced by weakening the strong coupling between electrons and phonons. The high photoluminescence quantum efficiency (PLQY) of 51 %, the extensive full width at half maximum (FWHM) of 270 nm and the stability provide advantages as a NIR luminescent material. The single-crystal-based NIR LED demonstrated its potential applications in NIR spectral detection as well as night vision.
Original language | English |
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Article number | e202207454 |
Number of pages | 9 |
Journal | Angewandte Chemie - International Edition |
Volume | 61 |
Issue number | 33 |
DOIs | |
Publication status | Published - 15 Aug 2022 |
Bibliographical note
Funding Information:This work was support from the National Natural Science Foundation of China (No. U1905213) and Department of Industry and Information Technology of Gansu Province. C.-G. Ma acknowledges the support of the National Natural Science Foundation of China (Grant No. 52161135110) and China-Poland Intergovernmental Science and Technology Cooperation Program (Grant No. 2020[15]/10). Thanks to Prof. Q. Liu ([email protected]) and Prof. J. Zhao ([email protected]) for their help in analysis and refinement of single crystals. Thanks to Prof. L. Zhao ([email protected]) for his help in temperature-dependent spectra tests and NIR applications.
Funding Information:
This work was support from the National Natural Science Foundation of China (No. U1905213) and Department of Industry and Information Technology of Gansu Province. C.‐G. Ma acknowledges the support of the National Natural Science Foundation of China (Grant No. 52161135110) and China‐Poland Intergovernmental Science and Technology Cooperation Program (Grant No. 2020[15]/10). Thanks to Prof. Q. Liu ([email protected]) and Prof. J. Zhao ([email protected]) for their help in analysis and refinement of single crystals. Thanks to Prof. L. Zhao ([email protected]) for his help in temperature‐dependent spectra tests and NIR applications.
Publisher Copyright:
© 2022 Wiley-VCH GmbH.
Funding
This work was support from the National Natural Science Foundation of China (No. U1905213) and Department of Industry and Information Technology of Gansu Province. C.-G. Ma acknowledges the support of the National Natural Science Foundation of China (Grant No. 52161135110) and China-Poland Intergovernmental Science and Technology Cooperation Program (Grant No. 2020[15]/10). Thanks to Prof. Q. Liu ([email protected]) and Prof. J. Zhao ([email protected]) for their help in analysis and refinement of single crystals. Thanks to Prof. L. Zhao ([email protected]) for his help in temperature-dependent spectra tests and NIR applications. This work was support from the National Natural Science Foundation of China (No. U1905213) and Department of Industry and Information Technology of Gansu Province. C.‐G. Ma acknowledges the support of the National Natural Science Foundation of China (Grant No. 52161135110) and China‐Poland Intergovernmental Science and Technology Cooperation Program (Grant No. 2020[15]/10). Thanks to Prof. Q. Liu ([email protected]) and Prof. J. Zhao ([email protected]) for their help in analysis and refinement of single crystals. Thanks to Prof. L. Zhao ([email protected]) for his help in temperature‐dependent spectra tests and NIR applications.
Keywords
- All-Inorganic Perovskite
- Near-Infrared Emission
- Self-Trapped Excitons
- Single Crystal