高效荧光材料4CzTPN-Ph对LED发光特性的影响

Influence of hyperfluorescence material of 4CzTPN-Ph on emission characteristics of white LED

为增强白光发光二极管(LED)的红光成分,通过在YAG荧光粉中掺杂质量分数分别为1、2、3、7和11%的高效红色荧光材料4CzTPN-Ph,制备了白光LED,提高了传统白光LED的显色指数。分析了4CzTPN-Ph对白光LED参数的影响。结果表明,4CzTPN-Ph可以被445nm的蓝光激发,掺杂浓度为7%时,红光峰值最强,同时出现了光谱展宽现象;当掺杂浓度为11%时,显色指数达到87.3%的最大值。

Traditional materials of preparing white LED are blue chip and yellow YAG, but they have a low CRI and lack of red component. In this paper, hyperfluorescence materials of 4CzTPN-Ph with the mass fractions of 1%,2% ,3% ,7% and 11% are mixed by adding YAG phosphor to preparate white LED. With this method, the device spectrum is optimized and the CRI is improve. The performance of white LED with each parameter is analyzed. The experiment shows that 4CzTPN-Ph can be excited by the blue light at 445 nrn from the LED chip. With the increase of doping concentration,a stronger red emission near 600 nm is observed. When the 4CzTPN-Ph is mixed with mass fraction of 7%,the red peak is the strongest,and spectrum broadening effect can be observed at the same time. So the hyperfluorescence material 4CzTPN-Ph is able to be filled in the missing red spectral components. When the 4CzTPN-Ph is mixed with mass fraction of 11%, the highest CRI of the prepared white LED can reach 87.3%.