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YAGG:Ce Phosphor-in-YAG Ceramic: An Efficient Green Color Converter Suitable for High-Power Blue Laser Lighting
ACS Applied Electronic Materials ( IF 4.3 ) Pub Date : 2020-07-21 , DOI: 10.1021/acsaelm.0c00512 Qiang-Qiang Zhu 1 , Yao Meng 1 , Hong Zhang 1 , Shuxing Li 2 , Le Wang 1 , Rong-Jun Xie 2
ACS Applied Electronic Materials ( IF 4.3 ) Pub Date : 2020-07-21 , DOI: 10.1021/acsaelm.0c00512 Qiang-Qiang Zhu 1 , Yao Meng 1 , Hong Zhang 1 , Shuxing Li 2 , Le Wang 1 , Rong-Jun Xie 2
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Thermally robust phosphor ceramics are an ideal color converter for high-power laser lighting applications. However, high-quality white light is difficult to achieve due to the absence of green and red emission materials. AnY3Al5–xGaxO12:Ce3+ (YAGG:Ce3+) ceramic can emit green light, while the strong oxidizing atmosphere is needed to suppress the Ga evaporation during the high-temperature fabrication process, which can seriously decrease the luminescence efficiency. To enable the green-emitting YAGG:Ce3+ material for laser lighting application, we report a composite phosphor ceramic for which the first achieved fine-grained YAGG:Ce3+ phosphor powders were dispersed into a YAG ceramic matrix (YAGG:Ce-YAG). The transmittance of the YAGG:Ce-YAG ceramic can reach 62% at a range of 500–800 nm owing to the similar refractive index and structure of two phases. The resulting phosphor ceramic also exhibits a high external quantum efficiency (EQE = 68.3%) and excellent thermal stability (luminescence intensity: 90% retention at 200 °C) close to those of the original phosphor powders. Furthermore, due to the superior thermal conductivity of the YAGG:Ce-YAG phosphor ceramic (9.4 Wm–1 K–1 at room temperature), a high luminous emittance of 700 lm/mm2 can be achieved under an excitation of 8.2 W/mm2 blue laser light. The achieved YAGG:Ce-YAG phosphor ceramic shows a promising application as the green color converter for high-power laser lighting.
中文翻译：
YAGG：Ce Phosphor-in-YAG陶瓷：适用于大功率蓝色激光照明的高效绿色转换器
耐热的磷光体陶瓷是用于大功率激光照明应用的理想色彩转换器。但是，由于缺少绿色和红色发光材料，很难获得高质量的白光。AnY 3 Al 5– x Ga x O 12：Ce 3+（YAGG：Ce 3+）陶瓷可以发出绿光，而高温环境下需要强烈的氧化气氛来抑制Ga的蒸发，这会严重降低发光效率。为了使绿色发光的YAGG：Ce 3+材料能够用于激光照明，我们报告了一种复合磷光体陶瓷，该材料首次实现了细粒度的YAGG：Ce将3+磷光体粉末分散到YAG陶瓷基体（YAGG：Ce-YAG）中。由于相似的折射率和两相结构，YAGG：Ce-YAG陶瓷的透射率在500-800 nm范围内可以达到62％。所得的磷光体陶瓷还具有接近原始磷光体粉末的高外部量子效率（EQE = 68.3％）和出色的热稳定性（发光强度：在200°C时90％的保留率）。此外，由于YAGG：Ce-YAG荧光粉陶瓷具有出色的导热性（室温下为9.4 Wm –1 K –1），在8.2 W / W的激发下可以实现700 lm / mm 2的高发光发射率。毫米2蓝色激光。所获得的YAGG：Ce-YAG磷光体陶瓷作为大功率激光照明的绿色转换器，具有广阔的应用前景。
更新日期：2020-08-25
中文翻译：
YAGG：Ce Phosphor-in-YAG陶瓷：适用于大功率蓝色激光照明的高效绿色转换器
耐热的磷光体陶瓷是用于大功率激光照明应用的理想色彩转换器。但是，由于缺少绿色和红色发光材料，很难获得高质量的白光。AnY 3 Al 5– x Ga x O 12：Ce 3+（YAGG：Ce 3+）陶瓷可以发出绿光，而高温环境下需要强烈的氧化气氛来抑制Ga的蒸发，这会严重降低发光效率。为了使绿色发光的YAGG：Ce 3+材料能够用于激光照明，我们报告了一种复合磷光体陶瓷，该材料首次实现了细粒度的YAGG：Ce将3+磷光体粉末分散到YAG陶瓷基体（YAGG：Ce-YAG）中。由于相似的折射率和两相结构，YAGG：Ce-YAG陶瓷的透射率在500-800 nm范围内可以达到62％。所得的磷光体陶瓷还具有接近原始磷光体粉末的高外部量子效率（EQE = 68.3％）和出色的热稳定性（发光强度：在200°C时90％的保留率）。此外，由于YAGG：Ce-YAG荧光粉陶瓷具有出色的导热性（室温下为9.4 Wm –1 K –1），在8.2 W / W的激发下可以实现700 lm / mm 2的高发光发射率。毫米2蓝色激光。所获得的YAGG：Ce-YAG磷光体陶瓷作为大功率激光照明的绿色转换器，具有广阔的应用前景。
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