Effects of Injection Current on Optical and Electrical Properties of GaN-based Green High Voltage LED

BAI Jun-xue; GUO Wei-ling; YU Xin; FAN Xing; LIU Jian-peng; HAN Yu

doi:10.3788/fgxb20143501.0101

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Effects of Injection Current on Optical and Electrical Properties of GaN-based Green High Voltage LED

更新时间：2020-08-12

- Effects of Injection Current on Optical and Electrical Properties of GaN-based Green High Voltage LED
- Chinese Journal of Luminescence Vol. 35, Issue 1, Pages: 101-104(2014)
- 作者机构：
  
  北京工业大学光电子技术省部共建教育部重点实验室, 北京 100124
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20143501.0101
  CLC： TN383+.1
- Received：14 September 2013，
  
  Revised：13 November 2013，
  
  Published：03 January 2014
- 稿件说明：
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白俊雪, 郭伟玲, 俞鑫, 樊星, 刘建鹏, 韩禹. 注入电流对绿光高压LED光电特性的影响[J]. 发光学报, 2014,35(1): 101-104

BAI Jun-xue, GUO Wei-ling, YU Xin, FAN Xing, LIU Jian-peng, HAN Yu. Effects of Injection Current on Optical and Electrical Properties of GaN-based Green High Voltage LED[J]. Chinese Journal of Luminescence, 2014,35(1): 101-104
白俊雪, 郭伟玲, 俞鑫, 樊星, 刘建鹏, 韩禹. 注入电流对绿光高压LED光电特性的影响[J]. 发光学报, 2014,35(1): 101-104 DOI： 10.3788/fgxb20143501.0101.

BAI Jun-xue, GUO Wei-ling, YU Xin, FAN Xing, LIU Jian-peng, HAN Yu. Effects of Injection Current on Optical and Electrical Properties of GaN-based Green High Voltage LED[J]. Chinese Journal of Luminescence, 2014,35(1): 101-104 DOI： 10.3788/fgxb20143501.0101.

摘要

设计并制备了12 V 的GaN基绿光高压发光二极管（LED），并对其进行了变电流测试。研究了绿光高压LED的正向电压、峰值波长、光功率以及光效等重要参数随注入电流的变化关系，电流变化范围为3~50 mA，测试温度为25 ℃。实验结果表明：电流对绿光高压LED的光电特性有很大影响。在驱动电流为20 mA时，对应电压为14 V。随着注入电流的增大，峰值波长蓝移了2 nm。随着电流的增大，光功率近似于线性增加。在注入电流从3 mA增大到20 mA的过程中，光效降低了约61%；在注入电流从20 mA增大到50 mA的过程中，光效降低了约39%。这说明高压LED在大电流驱动时，光效降低的幅度比较缓慢。上述结果对 GaN基绿光高压 LED 的改进优化具有一定的参考价值。

Abstract

GaN-based green high-voltage (HV) light emitting diodes (LEDs) of 12 V were designed and fabricated. The optical and electrical parameters such as forward voltage

peak of wavelength

optical power

and luminous efficiency were investigated when the injection current varied from 3 mA to 50 mA at 25 ℃. The results show that the injection current has a great effect on the optical and electrical properties of the GaN-based high-voltage LED. When the current is 20 mA

the corresponding voltage is 14 V. With the increasing of the injection current

the blue-shift of LED peak wavelength reaches 2 nm. In addition

the optical power increases approximately linearly with the current increasing. The luminous efficiency decreases 61% when the injection current increases from 3 mA to 20 mA

and decreases 39% when the injection current increases from 20 mA to 50 mA. It indicates that the luminous efficiency decreases more slowly when the high-voltage LED is driven by large current. These results will have a certain reference value for the improvement and optimization of GaN-based high-voltage LEDs.

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references

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