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1. 中国科学院, 研究生院
2. 中国科学院长春光学精密机械与物理研究所, 激发态物理重点实验室
收稿:2007-08-17,
修回:2007-10-26,
纸质出版:2008-03-20
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王健, 黄先, 刘丽, 吴庆, 褚明辉, 张立功, 侯凤勤, 刘学彦, 赵成久, 范翊, 罗劲松, 蒋大鹏. 温度和电流对白光LED发光效率的影响[J]. 发光学报, 2008,29(2): 358-362
WANG Jian, HUANG Xian, LIU Li, WU Qing, CHU Ming-hui, ZHANG Li-gong, HOU Feng-qin, LIU Xue-yan, ZHAO Cheng-jiu, FAN Yi, LUO Jin-song, JIANG Da-peng. Effect of Temperature and Current on LED Luminous Efficiency[J]. Chinese Journal of Luminescence, 2008,29(2): 358-362
王健, 黄先, 刘丽, 吴庆, 褚明辉, 张立功, 侯凤勤, 刘学彦, 赵成久, 范翊, 罗劲松, 蒋大鹏. 温度和电流对白光LED发光效率的影响[J]. 发光学报, 2008,29(2): 358-362 DOI:
WANG Jian, HUANG Xian, LIU Li, WU Qing, CHU Ming-hui, ZHANG Li-gong, HOU Feng-qin, LIU Xue-yan, ZHAO Cheng-jiu, FAN Yi, LUO Jin-song, JIANG Da-peng. Effect of Temperature and Current on LED Luminous Efficiency[J]. Chinese Journal of Luminescence, 2008,29(2): 358-362 DOI:
对大功率白光LED发光效率进行了研究
得出温度和电流对LED发光效率的影响:随着温度的升高
势阱中辐射复合几率降低
从而降低了发光效率;电流的升高
使更多的非平衡载流子穿过势垒
降低了发光效率。LED工作时
过高的工作温度或者过大的工作电流都会产生明显的光衰:如果LED工作温度超过芯片的承载温度
这将会使LED的发光效率快速降低
产生明显的光衰
并且对LED造成永久性破坏;如果LED的工作电流超过芯片的饱和电流
也会使LED发光效率快速降低
产生明显的光衰。并且LED所能承载的温度与饱和电流有一定关系
散热良好的装置可以使LED工作温度相对降低些
饱和电流也可以更大
LED也就可以在相对较大的电流下工作。
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