| InGaN蓝光LED量子效率与注入电流的关系研究 |
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| 引用本文： | 张福林.InGaN蓝光LED量子效率与注入电流的关系研究[J].光电子．激光,2009(11):1442-1445. |
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| 作者姓名： | 张福林 |
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| 作者单位： | 桂林电子科技大学信息与通信学院; |
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| 基金项目： | 广西自治区教育厅基金资助项目(D200649) |
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| 摘 要： | 研究了InGaN蓝光LED量子效率随注入电流的变化关系,当注入电流还未达到额定电流时,LED量子效率就随着注入电流增加而快速降低。通过Matlab计算出在俄歇复合的无辐射复合机制下量子效率与注入电流的理论关系式。与实验值的拟合结果显示,大电流注入下,LED的效率衰落同时由俄歇复合及其产生的热电子从发光有源区泄露引起。由蓝光LED这一效率-电流特性,提出了增强InGaN蓝光LED效率的途径。
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| 关 键 词： | InGaN LED 量子效率 非辐射复合 俄歇复合 大功率LED驱动 |
Investigation on the injected current dependence of InGaN blue LED's quantum efficiency |
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| ZHANG Fu-lin.Investigation on the injected current dependence of InGaN blue LED's quantum efficiency[J].Journal of Optoelectronics·laser,2009(11):1442-1445. |
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| Authors: | ZHANG Fu-lin |
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| Affiliation: | ZHANG Fu-lin,LIN Xu,LIAO Xin,HE Zhi-yi(Information & Communication College,Guilin University of Electronic Technology,Guilin 541004,China) |
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| Abstract: | The dependence of quantum efficiency on injected current of InGaN Blue LEDs is examined,which exhibits an efficiency droop with increasing the injected current to a value below the LED's rated current.The theoretical relationship between the quantum efficiency and the injected current is obtained by Matlab based on the Auger nonradiative recombination mechanism.By fitting it with the experimental data,the results show that the efficiency droop can be ascribed to the Auger recombination and the resulting hot... |
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| Keywords: | InGaN LED quantum efficiency nonradiative recombination Auger recombination high power LED drive |
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