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Luminescence properties of a new blue-emitting phosphor Ce-doped CaLaGa3S7 |
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| Authors: | Ruijin YuWeijia Ding Gongguo ZhangJianhui Zhang Jing Wang |
| Affiliation: | a College of Science, Northwest A&F University, Yangling, Shaanxi 712100, PR China b MOE Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou, Guangdong 510275, PR China c Institute of Biomaterial, College of Science, South China Agricultural University, Guangzhou, Guangdong 510642, PR China |
| Abstract: | A new series of blue-emitting Ce3+-doped CaLaGa3S7 thiogallate chalcogenide phosphors were synthesized by a solid-state reaction method. Their luminescence properties were investigated by photoluminescence excitation, emission spectra and lifetime. The critical dopant concentration was found to be 0.15 mol of Ce3+ (Rc = 15 Å) and the fluorescence lifetime of Ce3+ in CaLaGa3S7:0.15 Ce3+ was 12.9 ns. The blue-emitting LED was fabricated by combining an InGaN chip (395 nm) with a CaLaGa3S7:Ce3+ phosphor. The CIE chromaticity coordinates of the blue LED were calculated to be (0.14, 0.23). |
| Keywords: | Luminescence Chalcogenide Phosphors Cerium LEDs |
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