Performance improvement of InGaN blue light-emitting diodes with several kinds of electron-blocking layers

The performance of InGaN blue light-emitting diodes（LEDs） with different kinds of electron-blocking layers is investigated numerically.We compare the simulated emission spectra,electron and hole concentrations,energy band diagrams,electrostatic fields,and internal quantum efficiencies of the LEDs.Th...

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Bibliographic Details
Published in:Chinese physics B 2012-05, Vol.21 (5), p.686-691
Main Author: 陈峻 范广涵 张运炎 庞玮 郑树文 姚光锐
Format: Article
Language:English
Subjects:
AlGaN
Aluminum
Computer simulation
Electrostatic fields
Emission spectra
Energy bands
Indium gallium nitrides
InGaN
Injection current
Leakage current
LED
Light-emitting diodes
性能改进
电子
空穴注入
蓝色发光二极管
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Summary:The performance of InGaN blue light-emitting diodes（LEDs） with different kinds of electron-blocking layers is investigated numerically.We compare the simulated emission spectra,electron and hole concentrations,energy band diagrams,electrostatic fields,and internal quantum efficiencies of the LEDs.The LED using AlGaN with gradually increasing Al content from 0% to 20% as the electron-blocking layer（EBL） has a strong spectrum intensity,mitigates efficiency droop,and possesses higher output power compared with the LEDs with the other three types of EBLs.These advantages could be because of the lower electron leakage current and more effective hole injection.The optical performance of the specifically designed LED is also improved in the case of large injection current.
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/21/5/058504