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Ca8Mg7Si9N22:Ce3+—A Yellow-Emitting Nitride Phosphor for White Light Emitting Diodes
ACS Applied Electronic Materials ( IF 4.3 ) Pub Date : 2020-03-05 , DOI: 10.1021/acsaelm.0c00004
Chao Li 1 , Xiao-Ming Wang 1 , Zu-Pei Yang 2 , Huan Jiao 1
Affiliation  

Nitridomagnesosilicate phosphors are promising candidates for white light emitting diodes. Here, we report a yellow nitride phosphor Ca8Mg7Si9N22:Ce3+, which exhibits a broad band emission in the spectral range of 475–675 nm under the excitation of 445 nm. The photoluminescence intensity of Ca8–xMg7Si9N22:xCe3+ (0.01 ≤ x ≤ 0.11) reaches a maximum when x = 0.05. CIE coordinates and the color purity of Ca7.95Mg7Si9N22:0.05Ce3+ are (0.449, 0.531) and 84.0%, respectively. The Ca7.95Mg7Si9N22:0.05Ce3+ phosphor exhibits a good color drifting resistance with a maximum chromaticity shift of 0.0085 at 475 K. By combining the as-synthesized yellow nitride phosphor Ca7.95Mg7Si9N22:0.05Ce3+ and red nitride phosphor SrLiAl3N4:Eu2+ with a commercial blue InGaN chip, an all-nitride white light emitting diode device is fabricated, and a warm white light is generated with chromatic coordinates (0.471, 0.364) and color temperature of 2194 K.

中文翻译:

Ca 8 Mg 7 Si 9 N 22:Ce 3+ -一种用于白色发光二极管的黄色发光氮化物荧光粉

硅氮化硅磷光体是发白光二极管的有前途的候选者。在这里,我们报告了一种黄色的氮化物荧光粉Ca 8 Mg 7 Si 9 N 22:Ce 3+,在445 nm的激发下,在475-675 nm的光谱范围内具有宽带发射。Ca的光致发光强度8- X的Mg 7的Si 9 Ñ 22X的Ce 3+(0.01≤ X ≤0.11)的最大到达时X = 0.05。Ca 7.95 Mg 7 Si 9 N的CIE坐标和色纯度22:0.05Ce 3+分别为(0.449,0.531 )和84.0%。Ca 7.95 Mg 7 Si 9 N 22:0.05Ce 3+荧光粉在475 K时表现出良好的耐色漂性,最大色度偏移为0.0085。通过组合合成后的黄色氮化物荧光粉Ca 7.95 Mg 7 Si 9 N 22: 0.05Ce 3+和红色氮化物荧光粉SrLiAl 3 N 4:Eu 2+ 使用市售的蓝色InGaN芯片,制造了全氮化物白色发光二极管器件,并生成了具有色坐标(0.471,0.364)和色温2194 K的暖白光。
更新日期:2020-03-05
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