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Enhancement of efficiency of InGaN-based light emitting diodes through strain and piezoelectric field management

Pal, J, Migliorato, MA, Li, C-K, Wu, Y-R, Crutchley, BG, Marko, IP and Sweeney, SJ (2013) Enhancement of efficiency of InGaN-based light emitting diodes through strain and piezoelectric field management Journal of Applied Physics, 114 (7).

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Abstract

We report calculations of the strain dependence of the piezoelectric field within InGaN multi-quantum wells light emitting diodes. Such fields are well known to be a strong limiting factor of the device performance. By taking into account the nonlinear piezoelectric coefficients, which in particular cases predict opposite trends compared to the commonly used linear coefficients, a significant improvement of the spontaneous emission rate can be achieved as a result of a reduction of the internal field. We propose that such reduction of the field can be obtained by including a metamorphic InGaN layer below the multiple quantum well active region. © 2013 AIP Publishing LLC.

Item Type: Article
Authors :
AuthorsEmailORCID
Pal, JUNSPECIFIEDUNSPECIFIED
Migliorato, MAUNSPECIFIEDUNSPECIFIED
Li, C-KUNSPECIFIEDUNSPECIFIED
Wu, Y-RUNSPECIFIEDUNSPECIFIED
Crutchley, BGUNSPECIFIEDUNSPECIFIED
Marko, IPUNSPECIFIEDUNSPECIFIED
Sweeney, SJUNSPECIFIEDUNSPECIFIED
Date : 21 August 2013
Identification Number : https://doi.org/10.1063/1.4818794
Depositing User : Symplectic Elements
Date Deposited : 28 Mar 2017 13:21
Last Modified : 28 Mar 2017 13:21
URI: http://epubs.surrey.ac.uk/id/eprint/802294

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