A Detailed Study on Phosphor-Converted Light-Emitting Diodes With Multi-Phosphor Configuration Using the Finite-Difference Time-Domain and Ray-Tracing Methods
A Detailed Study on Phosphor-Converted Light-Emitting Diodes With Multi-Phosphor Configuration Using the Finite-Difference Time-Domain and Ray-Tracing Methods
复制标题
使用时域有限差分和光线追踪方法详细研究具有多荧光粉配置的荧光粉转换发光二极管
DOI：
10.1109/jqe.2015.2472341
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发表时间：
2015-10-01
影响因子：
2.5
通讯作者：
Ding, Xin-Rui
中科院分区：
文献类型：
--
作者：
Li, Jia-Sheng;Chen, Jia-Xiao;Ding, Xin-Rui
虽然光学模拟已被广泛应用于研究荧光粉转换发光二极管(PCLED)，但据我们所知，还没有研究考虑形状不规则的荧光粉颗粒影响的PCLED模型。为了探讨这一问题，我们使用了时域有限差分方法来表征磷光转换元件(PCE)模型。此外，还用光线追踪法研究了掺有YAG：Ce和氮化物荧光粉的PCE基PCLED。结果表明，与相同尺寸的球形YAG：Ce荧光粉相比，棒状氮化物荧光粉对入射光的散射角度更大。反过来，它们不同的散射和吸收特性导致了荧光粉的混合浓度对PCLED的相关色温和光输出功率有显著的影响。
Although the optical simulations have been widely adopted to study phosphor-converted light-emitting diodes (pcLEDs), to the best of our knowledge, there is no study that investigates the pcLED model considering the effect of phosphor particles with irregular shapes. In order to explore this topic, we employ the finite-difference time-domain method to characterize the phosphor-converted element (PCE) model. Furthermore, the PCE-based pcLED with YAG:Ce and nitride phosphors is investigated by the ray-tracing method. The results show that the rod-shaped nitride phosphor can scatter incident light to larger angles compared with the spherical YAG:Ce phosphor of the same size. In turn, their different scattering and absorption characterizations cause that the mixing concentration of the phosphors has a significant effect on the correlative color temperature and light output power of the pcLED.