J4 ›› 2014, Vol. 31 ›› Issue (1): 107-115.

• 半导体光电 • 上一篇    

单量子阱InGaN/GaN势垒高度与LED光电性能关系研究

张大庆 ,李国斌,陈长水   

  1. 1 总参谋部第六十研究所, 江苏 南京 210016; 2 华南师范大学信息光电子科技学院, 广东 广州 510631
  • 收稿日期:2013-05-03 修回日期:2013-06-07 出版日期:2014-01-28 发布日期:2013-12-31
  • 通讯作者: 张大庆(1968-)高级工程师,测控技术及仪器专业博士,现从事无人机总体、组合导航、航空电气、传感测量等理论和技术研究工作 E-mail:zhangdq_nrist@163.com
  • 基金资助:
    国家自然科学基金(60878063) 、广东省自然科学基金重点项目(10251063101000001;8251063101000006)联合资助

Relationship between barrier height of single quantum well InGaN/GaN and LED photoelectric performance

ZHANG Da-qing, LI Guo-bin, CHEN Chang-shui   

  1. 1 General Staff 60th Institute of the PLA, Nanjing 210016 , China; 2 School of Information and Optoelectronic Science and Engineering, South China Normal University,Guangzhou 510631, China
  • Received:2013-05-03 Revised:2013-06-07 Published:2014-01-28 Online:2013-12-31

摘要: 通过对InxGa1-xN掺杂不同组份的In来改变InxGa1-xN的禁带宽度,从而改变量子阱势垒高度,并研究其与发光二极管光电性能、效率下降之间的关系。通过仿真模拟实验研究了不同量子阱势垒高度与InGaN /GaN量子阱发光二极管的功率光谱密度、内量子效率、发光功率及复合率之间的关系。分析结果表明:(1) In含量与发光二极管的光电性能并非成线性关系。(2) 在电流密度较低时,In组份越小,光谱密度峰值越大,发光功率越大。(3) 在电流密度较大时,In组份越大,光谱密度峰值越大,发光功率越大。(4) 光谱蓝移与电流密度大小紧密相关,电流密度大的蓝移程度大,反之越小。因此,应该根据不同的电流密度来选择In组份的大小,从而提高发光效率。

关键词: 光电子学, 量子阱垒高, In含量, 数值模拟, InGaN/GaN发光二极管

Abstract: Band gap of the InxGa1-xN was changed by doping with different concentrations of In content for changing the quantum well barrier height. Studied of the relationship between the type of barrier height and the power spectral density, the internal quantum efficiency, the light emitting power and the recombination rate of the InGaN/GaN quantum well light-emitting diode. The analysis results showed that: (1) the In content of the light-emitting diode and optical properties is not a linear relationship. (2) When the current density is low, the smaller the In content, the greater the peak of the spectral density and the power of the light emitting; (3) However, when the current density is larger, the greater the In content, the greater the peak of the spectral density and the power of the light emitting. (4) The blue-shift associated with the size of the current density, when current density is large, blue-shift is big, the smaller the contrary. Therefore, it should be according to the type of current density to select the content of In, so as to improve the luminous efficiency.

Key words: optoelectronics, Quantum well barrier height, In concentration, numerical simulate, InGaN/ GaN Light Emitting Diodes

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