功率型LED电压温度系数的研究

被引:9
作者
张海兵
吕毅军
李开航
陈焕庭
高玉琳
陈忠
机构
[1] 厦门大学物理系福建省半导体照明工程技术研究中心
关键词
功率型LED; 结温; 电压温度系数; 温度传感器;
D O I
10.16136/j.joel.2008.12.009
中图分类号
TN312.8 [];
学科分类号
0803 ;
摘要
理论上详细分析了LED正向电压随温度变化的物理机理,并在大的电流范围(0.1~200 mA)和温度范围(60~350 K)内,对AlGaInPI、nGaN材料系功率型LED正向电压随温度的变化关系进行了系统的实验研究。发现在恒定电流下,两者的变化关系可分为高温区和低温区两段。在高温区两者为线性反比关系,并且电压温度系数与正向电流有关,在低温区正向电压随温度减小而突然急剧增大。理论很好地解释了实验结果。
引用
收藏
页码:1580 / 1583
页数:4
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