热效应对白光LED光电参数的影响  

Influence of thermal effect on white LED photoelectric properties

作　　者：许毅钦[1] 李炳乾[1] 赵维[1] 张康[1] 王君君[1] 张志清[1] 刘宁炀 苏海常[1] 

机构地区：[1]广东省工业技术研究院(广州有色金属研究院),广东广州510650

出　　处：《材料研究与应用》2014年第4期245-250,共6页Materials Research and Application

基　　金：国家自然科学基金(11304048);广东省战略性新兴产业LED专项(2012A080302002;2010A081001001);广州市应用基础研究专项(2013J4100014)

摘　　要：分别采用20ms快速脉冲测量和20s持续直流测量的方法,对白光LED的光电参数进行测量,研究热效应对白光LED的发光光谱、光通量、色温、荧光粉能量转换效率、光色变化等参数的影响.研究结果表明,随着电流的增加,通过20s持续直流后的白光LED的光通量增速变慢,荧光粉能量转换效率降低,光色变化大.We analyzes the thermal effect on white LED by 20 milliseconds single pulse power supply and20 seconds direct current（DC）power supply.The emission spectra,light output power,color temperature,phosphor energy conversion efficiency,light-color changed and so on was analyzed.The results show that the luminous flux increased slowly after lighting 20 seconds,the temperature color changed greatly,the phosphor conversion efficiency reduced and LED light-color changed a lot with the further increasing of injection current.

关 键 词：白光LED 热效应 光电参数 

分 类 号：TN312.8[电子电信—物理电子学]