A high efficiency broad-band near-infrared Ca2LuZr2Al3O12Cr3+ garnet phosphor for blue LED chips

doi:10.1039/c8tc01216d

CIOMP OpenIR

	A high efficiency broad-band near-infrared Ca2LuZr2Al3O12Cr3+ garnet phosphor for blue LED chips
	Zhang, L. L.; Zhang, S.; Hao, Z. D.; Zhang, X.; Pan, G. H.; Luo, Y. S.; Wu, H. J.; Zhang, J. H.
	2018
Source Publication	Journal of Materials Chemistry C
ISSN	2050-7526
Volume	6 Issue:18 Pages:4967-4976
Abstract	The garnet Ca2LuZr2Al3O12 (CLZA) is a promising broad-band NIR phosphor for blue LED chips when it is doped with Cr3+. The photoelectric efficiency of the pc-LED fabricated from CLZA:Cr3+ and a 460 nm LED chip, in the 750-820 nm spectral range, was 4.1%, which was superior to the efficiency of a tungsten lamp (2.9%). In CLZA's structure, Cr3+ occupied Ca2+/Lu3+ and Zr4+ sites and showed two luminescence centers. The crystal strength parameters of Ce3+ and Cr3+ were calculated to show the coordination environment of the dodecahedral and octahedral sites in CLZA. Low absorbance of Cr3+ was the main constraint on quantum efficiency. Ce3+ was thus introduced as a sensitizer to improve the absorbance. An efficient energy transfer process can be observed between Ce3+ and Cr3+ in CLZA. The temperature dependent properties of CLZA:Cr3+ were also studied. Two thermal processes (thermal quenching and thermal ionization) were observed and discussed in detail.
Keyword	5d-level energies crystalline environment deep-tissue ce3+ field Materials Science Physics
DOI	10.1039/c8tc01216d
Indexed By	SCI ; EI
Citation statistics
Document Type	期刊论文
Identifier	http://ir.ciomp.ac.cn/handle/181722/60867
Collection	中国科学院长春光学精密机械与物理研究所
Recommended Citation GB/T 7714	Zhang, L. L.,Zhang, S.,Hao, Z. D.,et al. A high efficiency broad-band near-infrared Ca2LuZr2Al3O12Cr3+ garnet phosphor for blue LED chips[J]. Journal of Materials Chemistry C,2018,6(18):4967-4976.
APA	Zhang, L. L..,Zhang, S..,Hao, Z. D..,Zhang, X..,Pan, G. H..,...&Zhang, J. H..(2018).A high efficiency broad-band near-infrared Ca2LuZr2Al3O12Cr3+ garnet phosphor for blue LED chips.Journal of Materials Chemistry C,6(18),4967-4976.
MLA	Zhang, L. L.,et al."A high efficiency broad-band near-infrared Ca2LuZr2Al3O12Cr3+ garnet phosphor for blue LED chips".Journal of Materials Chemistry C 6.18(2018):4967-4976.

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中国科学院长春光学精密机械与物理研究所