Efficient spectral regulation in Ce:Lu
Ce,Cr:LuAG TC, spectral regulation, energy transfer, color rendering index (CRI), white LEDs/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.
ZHOU, Tianyuan; HOU, Chen; ZHANG, Le; MA, Yuelong; KANG, Jian; LI, Tao; WANG, Rui; HUANG, Jin; LI, Junwei; REN, Haidong; FU, Zhenxiao; SELIM, Farida A.; LI, Ming; and CHEN, Hao
"Efficient spectral regulation in Ce:Lu,"
Journal of Advanced Ceramics: Vol. 10:
5, Article 13.
Available at: https://dc.tsinghuajournals.com/journal-of-advanced-ceramics/vol10/iss5/13