Efficient spectral regulation in Ce:Lu3(Al,Cr)5O12 and Ce:Lu3(Al,Cr)5O12/Ce:Y3Al5O12 transparent ceramics with high color rendering index for high-power white LEDs/LDs

Journal of Advanced Ceramics - Tập 10 - Trang 1107-1118 - 2021
Tianyuan Zhou1, Chen Hou1, Le Zhang1,2,3, Yuelong Ma1,4, Jian Kang1,2, Tao Li1, Rui Wang1, Jin Huang1, Junwei Li1, Haidong Ren5, Zhenxiao Fu5, Farida A. Selim3, Ming Li6, Hao Chen1,2
1Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronics Engineering, Jiangsu Normal University, Xuzhou, China
2Jiangsu Xiyi Advanced Materials Research Institute of Industrial Technology, Xuzhou, China
3Department of Physics and Astronomy, Bowling Green State University, Bowling Green, USA
4School of Mechanical Engineering, Jiangsu University, Zhenjiang, China
5State Key Laboratory of Advanced Materials and Electronic Components, Guangdong Fenghua Advanced Technology Holding Co., Ltd, Zhaoqing, China
6Department of Mechanical, Materials and Manufacturing, University of Nottingham, Nottingham, UK

Tóm tắt

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.

Tài liệu tham khảo

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Journal of Advanced Ceramics

Tập 10

1107-1118

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