Journal
JOURNAL OF ADVANCED CERAMICS
Volume 10, Issue 5, Pages 1107-1118Publisher
SPRINGER
DOI: 10.1007/s40145-021-0496-8
Keywords
Ce,Cr:LuAG TC; spectral regulation; energy transfer; color rendering index (CRI); white LEDs/LDs
Categories
Funding
- National Natural Science Foundation of China [61975070, 51902143, 61971207, 61775088]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Key Research and Development Project of Jiangsu Province [BE2018062, BE2019033]
- Natural Science foundation of Jiangsu Province [BK20191467]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX20_2336]
- International S&T Cooperation Program of Jiangsu Province [BZ2019063, BZ2020045, BZ2020030]
- Natural Science Foundation of the Jiangsu Higher Education Institutes of China [19KJB430018, 20KJA430003]
- Special Project for Technology Innovation of Xuzhou City [KC19250, KC20201, KC20244]
- Open Project of State Key Laboratory of Advanced Materials and Electronic Components [FHR-JS-202011017]
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Ce,Cr:LuAG TCs achieved efficient spectral regulation through Cr3+ doping, enhancing their luminescence properties in white LED/LD applications. By combining with other materials, such as 0.5 at% Ce:YAG TC, even better results were obtained in terms of CRI values for TC based white LEDs and LDs.
Realizing a high color rendering index (CRI) in Ce:LuAG transparent ceramics (TCs) with desired thermal stability is essential to their applications in white LEDs/LDs as color converters. In this study, based on the scheme of configuring the red component by Cr3+ doping, an efficient spectral regulation was realized in Ce,Cr:LuAG TCs. A unilateral shift phenomenon could be observed in both photoluminescence (PL) and photoluminescence excitation (PLE) spectra of TCs. By constructing TC-based white LED/LD devices in a remote excitation mode, luminescence properties of Ce,Cr:LuAG TCs were systematically investigated. The CRI values of Ce:LuAG TC based white LEDs could be increased by a magnitude of 46.2%. Particularly, by combining the as fabricated Ce,Cr:LuAG TCs with a 0.5 at% Ce:YAG TC, surprising CRI values of 88 and 85.5 were obtained in TC based white LEDs and LDs, respectively. Therefore, Ce,Cr:LuAG TC is a highly promising color convertor for high-power white LEDs/LDs applied in general lighting and displaying.
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