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Relationship Between Light-emitting Diode Performance and Different Substrates Working Under Non-isothermal Model
Author(s): 
Pages: 616-623
Year: Issue:  6
Journal: Chinese Journal of Luminescence

Keyword:  发光二极管内量子效率衬底温度场;
Abstract: 发光二极管(LED)中载流子的输运及复合决定了其非均匀的内热源强度及分布,而芯片温度又影响载流子的输运及复合,两者具有强烈的耦合关系.本文利用非等温多物理场耦合模型对以蓝宝石、Si及SiC为衬底的LED芯片的内量子效率、光谱特性及光电转换效率进行了系统研究.结果表明:以SiC为衬底的LED芯片具有最小的效率下垂效应(Efficiency droop)及最高的光谱强度和光电转换效率.这是因为与其他两...
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