KMS Shanghai Institute of Ceramics，Chinese Academy of Sciences
| A new CaF2-YAG: Ce composite phosphor ceramic for high-power and high-color-rendering WLEDs | |
| Gu, Chi; Wang, Xiao-Jun; Xia, Chao; Li, Shuxing; Liu, Peng; Li, Dongzhen; Li, Huili; Zhou, Guohong; Zhang, Jian; Xie, Rong-Jun | |
| 2019-07-28 | |
| Source Publication | JOURNAL OF MATERIALS CHEMISTRY C
 |
| ISSN | 2050-7526 |
| Volume | 7Issue:28Pages:8569 |
| Subtype | Article |
| Abstract | Thermally robust and optically transparent phosphor ceramics are now attracting great attention as promising luminescent materials for high-power white light-emitting diodes (WLEDs). Here, we report a new CaF2-YAG: Ce phosphor ceramic in which the yellow-emitting YAG: Ce particles are embedded in a non-luminescent CaF2 ceramic matrix. The composite phosphor ceramic was fabricated at a very low sintering temperature of 700 degrees C by using a simple hot-pressing method. No detectable interfacial reaction occurs between the YAG: Ce particle and the CaF2 matrix. Owing to the excellent optical properties and high thermal conductivity of CaF2, the prepared CaF2-YAG: Ce phosphor ceramic shows a high quantum efficiency (IQE = 83.2%), and a low thermal quenching (only 9% loss in luminescence at 150 degrees C). WLEDs, fabricated by combining the CaF2-YAG: Ce phosphor ceramic with a 460 nm blue chip of 2 W, exhibited bright white light with a luminous flux of 359.7 lm, a color temperature of 4021-7941 K and a color rendering index of 70.1-82.7. The composite phosphor ceramic showed a better performance than the traditional single-phase YAG: Ce ceramic, enabling it to be used in high-power WLEDs. |
| DOI | 10.1039/c9tc02407g |
| Language | 英语 |
| WOS Research Area | Materials Science ; Physics |
| Publisher | ROYAL SOC CHEMISTRY |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.sic.ac.cn/handle/331005/26961 |
| Collection | 中国科学院上海硅酸盐研究所 |
| Recommended Citation GB/T 7714 | Gu, Chi,Wang, Xiao-Jun,Xia, Chao,et al. A new CaF2-YAG: Ce composite phosphor ceramic for high-power and high-color-rendering WLEDs[J]. JOURNAL OF MATERIALS CHEMISTRY C,2019,7(28):8569. |
| APA | Gu, Chi.,Wang, Xiao-Jun.,Xia, Chao.,Li, Shuxing.,Liu, Peng.,...&Xie, Rong-Jun.(2019).A new CaF2-YAG: Ce composite phosphor ceramic for high-power and high-color-rendering WLEDs.JOURNAL OF MATERIALS CHEMISTRY C,7(28),8569. |
| MLA | Gu, Chi,et al."A new CaF2-YAG: Ce composite phosphor ceramic for high-power and high-color-rendering WLEDs".JOURNAL OF MATERIALS CHEMISTRY C 7.28(2019):8569. |
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