| Autor: |
Zhi Lin Li, Yan Jie Yin, Wan Zhang, Li Li Wang, Ying Han, Yan Mei Li, Yong Qing Zhai |
| Rok vydání: |
2017 |
| Předmět: |
|
| Zdroj: |
Key Engineering Materials. 727:592-597 |
| ISSN: |
1662-9795 |
| DOI: |
10.4028/www.scientific.net/kem.727.592 |
| Popis: |
Red phosphors CaMoO4:Eu3+ were synthesized by microwave method with MnO2 as microwave absorbent. The phase structure and luminescent properties of the as-synthesized phosphors were investigated by X-ray powder diffraction and Fluorescence spectrophotometer. The results show that when the reaction time was 40 min, microwave power was medium-high fire (~560 W), we got the tetragonal CaMoO4:Eu3+ pure phase. The excitation spectrum of CaMoO4:Eu3+ was composed by a broad band between 200 nm and 350 nm and a series of peaks from 350 nm to 500 nm. The main peak was at 305 nm. The emission spectrum was composed of a series of peaks in the range of 550~750 nm and the main peak was at 617 nm due to the 5D0→7F2 transition of Eu3+. Doping charge compensator Li+, Na+ or K+ could improve the luminous intensity of the sample. When the doping amount of Li+, Na+ or K+ were 8 mol%, the luminous intensity of the sample reached the maximum. The intensity of the emission peak at 617 nm was 4.04, 3.42, 3.48 times of sample without doping charge compensator. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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