Mn-ion-enhanced red spectral emission from yttrium aluminum garnet doped cerium phosphor |
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| Authors: | YinSheng Zhao JiaSong Zhong WeiDong Xiang Wei Hua HaiLong Yang Jing Wang Wen Cai YongJun Dong MingGuo Shao |
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| Institution: | ZHAO YinSheng~1,ZHONG JiaSong~1,XIANG WeiDong~1*,HUA Wei~2,YANG HaiLong~1,WANG Jing~1,CAI Wen~1,DONG YongJun~3 & SHAO MingGuo~21 School of Materials Science and Engineering,Tongji University,Shanghai 201804,China,2 College of Chemistry and Materials Engineering,Wenzhou University,Wenzhou 325035,3 Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800 |
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| Abstract: | Mn ions were co-doped in yttrium aluminum garnet doped cerium (YAG:Ce) phosphors as a co-activator and host lattice element using the co-precipitation method. These ions broadened the emission spectra of the pure YAG:Ce phosphor, which is caused by the 2E-4A2, 5E-5T2 or 1T2-5T2 transition. From our X-ray diffraction results, we observed that Ce3+ (1.032 Å) was substituted at the Y3+ (0.900 Å) site, and Mn4+ (0.538 Å) and Mn3+ (0.67 Å) were substituted at the Al3+ (0.535 Å) site. The chromaticity color co-ordinates of YAG:Ce0.06 is (0.203, 0.167), and the indices of YAG:Ce0.06, Mn0.04 and YAG:Ce0.06, Mn0.08 are (0.249, 0.181) and (0.233, 0.194), respectively. The manganese co-doped yttrium aluminum garnet doped cerium blended with the YAG:Ce phosphor showed improved white light emission. |
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| Keywords: | phosphor LED manganese YAG:Ce |
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