Improvement Of Led Light Extraction Efficiency By Silica Micro Repeating Structure Growth

Light extraction efficiency (LEE) is an important factor for Light Emitting Diodes (LED). As of today, most LEE improvement methods involve complex fabrication either on the finished LED chip or during the LED processing itself. In this study, micro repeating structures (MRS) are constructed using s...

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Main Author:	Joshua Gan, Oon Joo
Format:	Thesis
Language:	English
Published:	2018
Subjects:	T Technology
Online Access:	http://eprints.usm.my/56385/1/Improvement%20Of%20Led%20Light%20Extraction%20Efficiency%20By%20Silica%20Micro%20Repeating%20Structure%20Growth_Joshua%20Gan%20Oon%20Joo.pdf
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spelling	my-usm-ep.563852023-01-18T04:33:58Z Improvement Of Led Light Extraction Efficiency By Silica Micro Repeating Structure Growth 2018-08-01 Joshua Gan, Oon Joo T Technology TN Mining Engineering. Metallurgy Light extraction efficiency (LEE) is an important factor for Light Emitting Diodes (LED). As of today, most LEE improvement methods involve complex fabrication either on the finished LED chip or during the LED processing itself. In this study, micro repeating structures (MRS) are constructed using silica micro repeating structure growth (SMRSG) to improve LEE. In contrast to other complex fabrication methods, the SMRSG was done through a Stöber solution growth method. The solution preparation was relatively simple, using tetraethyl orthosilicate (TEOS), surfactant and solvents. The LEE result of the LED after SMRSG was characterized through using a spectrophotometer. It showed an average of 0.77% increment in brightness for unroughened LED. A separate study on using sodium hydroxide (NaOH) for post LED fabrication cleaning was also conducted. A new discovery was achieved where the brightness of the LED was increased by 5.05% and 1.11% for roughened and unroughened LED respectively. The short cleaning time (30 seconds) with NaOH was to clean the LED surface from contaminants. This suggests that the presence of the SMRSG which is an MRS and cleaning of the LED surface was able to change the LEE of the LED. 2018-08 Thesis http://eprints.usm.my/56385/ http://eprints.usm.my/56385/1/Improvement%20Of%20Led%20Light%20Extraction%20Efficiency%20By%20Silica%20Micro%20Repeating%20Structure%20Growth_Joshua%20Gan%20Oon%20Joo.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	T Technology T Technology
spellingShingle	T Technology T Technology Joshua Gan, Oon Joo Improvement Of Led Light Extraction Efficiency By Silica Micro Repeating Structure Growth
description	Light extraction efficiency (LEE) is an important factor for Light Emitting Diodes (LED). As of today, most LEE improvement methods involve complex fabrication either on the finished LED chip or during the LED processing itself. In this study, micro repeating structures (MRS) are constructed using silica micro repeating structure growth (SMRSG) to improve LEE. In contrast to other complex fabrication methods, the SMRSG was done through a Stöber solution growth method. The solution preparation was relatively simple, using tetraethyl orthosilicate (TEOS), surfactant and solvents. The LEE result of the LED after SMRSG was characterized through using a spectrophotometer. It showed an average of 0.77% increment in brightness for unroughened LED. A separate study on using sodium hydroxide (NaOH) for post LED fabrication cleaning was also conducted. A new discovery was achieved where the brightness of the LED was increased by 5.05% and 1.11% for roughened and unroughened LED respectively. The short cleaning time (30 seconds) with NaOH was to clean the LED surface from contaminants. This suggests that the presence of the SMRSG which is an MRS and cleaning of the LED surface was able to change the LEE of the LED.
format	Thesis
qualification_level	Master's degree
author	Joshua Gan, Oon Joo
author_facet	Joshua Gan, Oon Joo
author_sort	Joshua Gan, Oon Joo
title	Improvement Of Led Light Extraction Efficiency By Silica Micro Repeating Structure Growth
title_short	Improvement Of Led Light Extraction Efficiency By Silica Micro Repeating Structure Growth
title_full	Improvement Of Led Light Extraction Efficiency By Silica Micro Repeating Structure Growth
title_fullStr	Improvement Of Led Light Extraction Efficiency By Silica Micro Repeating Structure Growth
title_full_unstemmed	Improvement Of Led Light Extraction Efficiency By Silica Micro Repeating Structure Growth
title_sort	improvement of led light extraction efficiency by silica micro repeating structure growth
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral
publishDate	2018
url	http://eprints.usm.my/56385/1/Improvement%20Of%20Led%20Light%20Extraction%20Efficiency%20By%20Silica%20Micro%20Repeating%20Structure%20Growth_Joshua%20Gan%20Oon%20Joo.pdf
_version_	1776101161363832832

Improvement Of Led Light Extraction Efficiency By Silica Micro Repeating Structure Growth

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