The Fabrication of Blue Organic Light Emitting Diode with Stacked Multi-Emission Layers Structure
碩士 === 義守大學 === 電子工程學系 === 92 === In this investigation, we fabricated OLEDs with a multi-emission layer structure stacked by NPB/MTDATA. Firstly, we studied the effect of NPB and MTDATA thickness, respectively, on the properties of devices with the structure ITO/ MTDATA(200Å)/ NPB[(600-X...
Main Authors: | , |
---|---|
Other Authors: | |
Format: | Others |
Language: | zh-TW |
Published: |
2004
|
Online Access: | http://ndltd.ncl.edu.tw/handle/24587436571537194613 |
id |
ndltd-TW-092ISU00428020 |
---|---|
record_format |
oai_dc |
spelling |
ndltd-TW-092ISU004280202016-01-04T04:09:17Z http://ndltd.ncl.edu.tw/handle/24587436571537194613 The Fabrication of Blue Organic Light Emitting Diode with Stacked Multi-Emission Layers Structure 堆疊式多層發光層藍光有機發光二極體之研製 Shih-Chin Lin 林士欽 碩士 義守大學 電子工程學系 92 In this investigation, we fabricated OLEDs with a multi-emission layer structure stacked by NPB/MTDATA. Firstly, we studied the effect of NPB and MTDATA thickness, respectively, on the properties of devices with the structure ITO/ MTDATA(200Å)/ NPB[(600-X-Y)Å)/ MTDATA(YÅ)/ NPB(XÅ)/ BCP (150Å)/ Alq(250Å)/ LiF(7Å)/ Al. We found the devices with thickness of NPB and MTDATA are both 100Å possess the optimum properties. It implies that the thickness ratio of NPB and MTDATA is 1 in a stacked multi-emission layer(SMEL) OLED will provide a optimal characteristic. Then we studied the photoelectronic properties of devices with double SMEL OLEDs. The device’s structure is ITO/ MTDATA(200Å)/ NPB(200Å)/ [MTDATA(100Å)/ NPB(100Å)]n=2/ BCP(150Å)/ Alq(250Å)/ LiF(7Å)/ Al. Furthermore, we fabricated SMEL OLEDs by dividing the emission layer. The thickness ratio of NPB and MTDATA in SMEL maintains 1. The structure is ITO/MTDATA(200Å)/NPB(200Å)/[MTDATA(200/nÅ)/NPB(200/nÅ)]n/BCP (150Å)/Alq(250Å)/ LiF(7Å)/Al. The device shows optimum properties when the number(n) is 3. We also studied the mechanism which improves the luminance efficiency of devices. There are two mechanisms which may improve the luminance efficiency. Firstly, several energy wells produced by the difference of the lowest occupied molecular orbit (LUMO) between NPB and MTDATA will capture the electrons in the NPB layer and they recombine with holes. Electron-hole recombination zone is dispersed by the exise of energy wells and luminance efficiency can be improved. Secondly, the SMEL in the structure may decrease the mobility of holes to balance the amount of electrons and holes at the NPB/BCP interface. It will improve the luminance efficiency of devices. For confirming the first mechanism, we doped rubrene into NPB of SMEL to observe whether there are carriers recombine in the NPB layer to generate the light from rubrene. Meiso Yokoyama Shui-Hsiang Su 橫山明聰 蘇水祥 2004 學位論文 ; thesis 71 zh-TW |
collection |
NDLTD |
language |
zh-TW |
format |
Others
|
sources |
NDLTD |
description |
碩士 === 義守大學 === 電子工程學系 === 92 === In this investigation, we fabricated OLEDs with a multi-emission layer structure stacked by NPB/MTDATA. Firstly, we studied the effect of NPB and MTDATA thickness, respectively, on the properties of devices with the structure ITO/ MTDATA(200Å)/ NPB[(600-X-Y)Å)/ MTDATA(YÅ)/ NPB(XÅ)/ BCP (150Å)/ Alq(250Å)/ LiF(7Å)/ Al. We found the devices with thickness of NPB and MTDATA are both 100Å possess the optimum properties. It implies that the thickness ratio of NPB and MTDATA is 1 in a stacked multi-emission layer(SMEL) OLED will provide a optimal characteristic. Then we studied the photoelectronic properties of devices with double SMEL OLEDs. The device’s structure is ITO/ MTDATA(200Å)/ NPB(200Å)/ [MTDATA(100Å)/ NPB(100Å)]n=2/ BCP(150Å)/ Alq(250Å)/ LiF(7Å)/ Al. Furthermore, we fabricated SMEL OLEDs by dividing the emission layer. The thickness ratio of NPB and MTDATA in SMEL maintains 1. The structure is ITO/MTDATA(200Å)/NPB(200Å)/[MTDATA(200/nÅ)/NPB(200/nÅ)]n/BCP (150Å)/Alq(250Å)/ LiF(7Å)/Al. The device shows optimum properties when the number(n) is 3.
We also studied the mechanism which improves the luminance efficiency of devices. There are two mechanisms which may improve the luminance efficiency. Firstly, several energy wells produced by the difference of the lowest occupied molecular orbit (LUMO) between NPB and MTDATA will capture the electrons in the NPB layer and they recombine with holes. Electron-hole recombination zone is dispersed by the exise of energy wells and luminance efficiency can be improved. Secondly, the SMEL in the structure may decrease the mobility of holes to balance the amount of electrons and holes at the NPB/BCP interface. It will improve the luminance efficiency of devices. For confirming the first mechanism, we doped rubrene into NPB of SMEL to observe whether there are carriers recombine in the NPB layer to generate the light from rubrene.
|
author2 |
Meiso Yokoyama |
author_facet |
Meiso Yokoyama Shih-Chin Lin 林士欽 |
author |
Shih-Chin Lin 林士欽 |
spellingShingle |
Shih-Chin Lin 林士欽 The Fabrication of Blue Organic Light Emitting Diode with Stacked Multi-Emission Layers Structure |
author_sort |
Shih-Chin Lin |
title |
The Fabrication of Blue Organic Light Emitting Diode with Stacked Multi-Emission Layers Structure |
title_short |
The Fabrication of Blue Organic Light Emitting Diode with Stacked Multi-Emission Layers Structure |
title_full |
The Fabrication of Blue Organic Light Emitting Diode with Stacked Multi-Emission Layers Structure |
title_fullStr |
The Fabrication of Blue Organic Light Emitting Diode with Stacked Multi-Emission Layers Structure |
title_full_unstemmed |
The Fabrication of Blue Organic Light Emitting Diode with Stacked Multi-Emission Layers Structure |
title_sort |
fabrication of blue organic light emitting diode with stacked multi-emission layers structure |
publishDate |
2004 |
url |
http://ndltd.ncl.edu.tw/handle/24587436571537194613 |
work_keys_str_mv |
AT shihchinlin thefabricationofblueorganiclightemittingdiodewithstackedmultiemissionlayersstructure AT línshìqīn thefabricationofblueorganiclightemittingdiodewithstackedmultiemissionlayersstructure AT shihchinlin duīdiéshìduōcéngfāguāngcénglánguāngyǒujīfāguāngèrjítǐzhīyánzhì AT línshìqīn duīdiéshìduōcéngfāguāngcénglánguāngyǒujīfāguāngèrjítǐzhīyánzhì AT shihchinlin fabricationofblueorganiclightemittingdiodewithstackedmultiemissionlayersstructure AT línshìqīn fabricationofblueorganiclightemittingdiodewithstackedmultiemissionlayersstructure |
_version_ |
1718160183500210176 |