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A high efficiency broad-band near-infrared Ca2LuZr2Al3O12Cr3+ garnet phosphor for blue LED chips
文献类型：期刊论文
| 作者 | Zhang, L. L.; Zhang, S. ; Hao, Z. D.; Zhang, X.; Pan, G. H.; Luo, Y. S.; Wu, H. J.; Zhang, J. H.
|
| 刊名 | Journal of Materials Chemistry C
 |
| 出版日期 | 2018 |
| 卷号 | 6期号:18页码:4967-4976 |
| 关键词 | 5d-level energies crystalline environment deep-tissue ce3+ field Materials Science Physics |
| ISSN号 | 2050-7526 |
| DOI | 10.1039/c8tc01216d |
| 英文摘要 | 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. |
| 源URL | [http://ir.ciomp.ac.cn/handle/181722/60867]  |
| 专题 | 中国科学院长春光学精密机械与物理研究所 |
| 推荐引用方式 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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