Simulation On Performance Of Gan-Based Light Emitting Diodes With Varied Geometry And Contacts Design

The main objective of this research is to minimize the current crowding problem inside GaN-based Light Emitting Diode (LED). Self heating effects and low radiative recombination are among the consequences that restrict the true potential of high electrical and optical performance of LED. By using de...

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Main Author:	Othman, Muhammad Firdaus
Format:	Thesis
Language:	English
Published:	2010
Subjects:	QC1 Physics (General)
Online Access:	http://eprints.usm.my/43030/1/Muhammad_Firdaus_Bin_Othman24.pdf
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id	my-usm-ep.43030
record_format	uketd_dc
spelling	my-usm-ep.430302019-04-12T05:26:51Z Simulation On Performance Of Gan-Based Light Emitting Diodes With Varied Geometry And Contacts Design 2010-06 Othman, Muhammad Firdaus QC1 Physics (General) The main objective of this research is to minimize the current crowding problem inside GaN-based Light Emitting Diode (LED). Self heating effects and low radiative recombination are among the consequences that restrict the true potential of high electrical and optical performance of LED. By using device simulator, ISE TCAD as a tool, current crowding problem is investigated with varied geometries of lateral p-i-n LED structure. The effective lateral current paths between two contacts are examined by fixing the position of n-contact while p-contact position is varied on p-layer. This work revealed that the location of p-contact at the centre of p-type layer was the effective length of lateral current path where better current distribution and low series resistance were obtained due to the symmetry of current spreading length for carrier movement. Based on the effective lateral current path, the effect of contact geometrics showed that square shape contact out-performed other shape, namely hexagonal, octagonal and circular. The square shape which has largest contact periphery area helped current to spread uniformly and reduces the potential of current crowding at the n-contact due to lower resistance along the current path. 2010-06 Thesis http://eprints.usm.my/43030/ http://eprints.usm.my/43030/1/Muhammad_Firdaus_Bin_Othman24.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Sains Fizik
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	QC1 Physics (General)
spellingShingle	QC1 Physics (General) Othman, Muhammad Firdaus Simulation On Performance Of Gan-Based Light Emitting Diodes With Varied Geometry And Contacts Design
description	The main objective of this research is to minimize the current crowding problem inside GaN-based Light Emitting Diode (LED). Self heating effects and low radiative recombination are among the consequences that restrict the true potential of high electrical and optical performance of LED. By using device simulator, ISE TCAD as a tool, current crowding problem is investigated with varied geometries of lateral p-i-n LED structure. The effective lateral current paths between two contacts are examined by fixing the position of n-contact while p-contact position is varied on p-layer. This work revealed that the location of p-contact at the centre of p-type layer was the effective length of lateral current path where better current distribution and low series resistance were obtained due to the symmetry of current spreading length for carrier movement. Based on the effective lateral current path, the effect of contact geometrics showed that square shape contact out-performed other shape, namely hexagonal, octagonal and circular. The square shape which has largest contact periphery area helped current to spread uniformly and reduces the potential of current crowding at the n-contact due to lower resistance along the current path.
format	Thesis
qualification_level	Master's degree
author	Othman, Muhammad Firdaus
author_facet	Othman, Muhammad Firdaus
author_sort	Othman, Muhammad Firdaus
title	Simulation On Performance Of Gan-Based Light Emitting Diodes With Varied Geometry And Contacts Design
title_short	Simulation On Performance Of Gan-Based Light Emitting Diodes With Varied Geometry And Contacts Design
title_full	Simulation On Performance Of Gan-Based Light Emitting Diodes With Varied Geometry And Contacts Design
title_fullStr	Simulation On Performance Of Gan-Based Light Emitting Diodes With Varied Geometry And Contacts Design
title_full_unstemmed	Simulation On Performance Of Gan-Based Light Emitting Diodes With Varied Geometry And Contacts Design
title_sort	simulation on performance of gan-based light emitting diodes with varied geometry and contacts design
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Sains Fizik
publishDate	2010
url	http://eprints.usm.my/43030/1/Muhammad_Firdaus_Bin_Othman24.pdf
_version_	1747821151353044992

Simulation On Performance Of Gan-Based Light Emitting Diodes With Varied Geometry And Contacts Design

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