Preparation of (Lu,Y)3(Al,Sc,Cr)2Al3O12 phosphor ceramics with high thermal stability for near-infrared LED/LD
| Autor: | Yuelong Ma, Xingcan Li, Lan Wu, Chenyang Shao, Boqiang Zhang, Tao Pang, Lili Lu, Hui Qiu, Ye Tian, Guilu Wang, Yanbo Hui, Qianwen Guo, Daqin Chen |
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| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Journal of Advanced Ceramics, Vol 13, Iss 3, Pp 354-363 (2024) |
| Druh dokumentu: | article |
| ISSN: | 2226-4108 2227-8508 |
| DOI: | 10.26599/JAC.2024.9220860 |
| Popis: | Near-infrared (NIR) phosphor-converted light-emitting diodes/laser diodes (LEDs/LDs) are prospective lighting sources for NIR spectroscopy. However, developing NIR phosphor materials with desired thermal robustness and high photoelectric efficiency is a crucial challenge for their applications. In this work, based on the cationic radius matching effect, a series of (Lu,Y)3(Al,Sc,Cr)2Al3O12 NIR phosphor ceramics (LuYScCr NIR-PCs) were fabricated by vacuum sintering. Excellent thermal stability (95%@150 ℃) was obtained in the prepared NIR-PCs, owing to their weak electron–phonon coupling effect (small Huang–Rhys factor). Being excited at 460 nm, NIR-PCs realized a broadband emission (650–850 nm) with internal quantum efficiency (IQE) of 60.68%. Combining NIR-PCs with LED/LD chips, the maximum output power of the encapsulated LED prototype was 447 mW@300 mA with photoelectric efficiency of as high as 18.6 %@180 mA, and the maximum output power of the LD prototype was 814 mW@2.5 A. The working temperatures of NIR-PCs were 70.8 ℃@300 mA (LED) and 102.8 ℃@3 A (LD). Finally, the prepared NIR-PCs applied in food detection were verified in this study, demonstrating their anticipated application prospects in the future. |
| Databáze: | Directory of Open Access Journals |
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