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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/28096完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 李君浩(Jiun-Haw Lee) | |
| dc.contributor.author | Chin-An Tseng | en |
| dc.contributor.author | 曾慶安 | zh_TW |
| dc.date.accessioned | 2021-06-13T00:01:00Z | - |
| dc.date.available | 2012-08-01 | |
| dc.date.copyright | 2007-08-01 | |
| dc.date.issued | 2007 | |
| dc.date.submitted | 2007-07-31 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/28096 | - |
| dc.description.abstract | 在本篇論文中，我們研究了混合層結構發光二極體對操作時間的影響，我們利用插入一層紅色薄膜染料去觀察元件頻譜的變化，發現混合層元件衰減的程度，跟載子複合多寡的位置是有很大的相關性的。經由光激發光來探討元件材料的衰減，發現載子複合最多的區域，材料也被破壞的最多。我們認為，焦耳熱影響混合層結構元件非均勻的衰減相關。
此外，我們使用一個新合成材料來當作電子傳輸層，並將元件跟一般傳統元件比較，驅動電壓在25mA/cm2時有著2.2伏特的降低。我們也使用電洞傳輸層及電子傳輸層作為紅色磷光發光層之主體材料，並達到 14.3cd/A 之電流效率及 2.5V 驅動電壓之降低。 | zh_TW |
| dc.description.abstract | In this thesis, we study the degradation phenomena in a mixed-host (MH) organic light-emitting device (OLED) by using ultra-thin probe method. We observed spectral shift and then stable during the aging process, which results from materials decay. Non-uniform materials degradation with time at different positions of the MH emitting layer (EML) is observed by using photoluminescence measurement to define the intrinsic decay of materials. The decay rate exhibits similar trends to the recombination distribution in the MH-EML, which means degradation is a heat-assisted process.
Besides, we used a novel material, 1,1'-bis(2-phenyl-1,3,4-oxadiazol-5-yl) ferrocene (Fe-OXD), as electron transport layer (ETL) material which reduces the turn-on voltage by 2.2V at the current density 25mA/cm2 as compared to the conventional OLED. ETL and hole-transport layer materials are used as the host of the EML in a red phosphorescent, which shows a high efficiency of 14.3cd/A and a 2.5V lower driving voltage at 14mA/cm2. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-13T00:01:00Z (GMT). No. of bitstreams: 1 ntu-96-J94941016-1.pdf: 2169663 bytes, checksum: dbdfbb2c4cd7d8ca370d402752ccf501 (MD5) Previous issue date: 2007 | en |
| dc.description.tableofcontents | Contents
Chapter 1 Introduction 1 1.1 Degradation of OLED 3 1.1.1 Extrinsic Degradation 4 1.1.2 Intrinsic Degradation 7 1.2 Mixing Layer Technology 11 1.3 HTL and ETL Materials 13 1.3.1 Hole-transporting materials 14 1.3.2 Electron-transporting materials 16 1.4 Motivation 18 1.5 Thesis Organization 19 Chapter 2 Exprimental setup 20 2.1 Fabrication of OLED 21 2.2 Vacuum change shadow mask system design 24 2.3 Measurement systems 28 2.3.1 B-J-V & lifetime measurement 28 2.3.2 Devices PL measurement 31 Chapter 3 Mixed Host OLED Degradation 33 3.1 EL spectra evolution with different aging time 34 3.2 PL measurement for possible degradation mechanisms 49 3.3 Possible degradation mechanisms 56 Chapter 4 Study of Transporting Materials 58 4.1 Study of Fe-OXD 59 4.1.1 Optical characteristics 60 4.1.2 Injection and transport characteristics 61 4.1.3 Device optimization 64 4.2 Study of EML in red phosphorescent OLED 66 4.2.1 Characteristics and devices structure 68 4.2.2 Experimental results and discussions 70 Chapter 5 Conclusions 75 References 77 | |
| dc.language.iso | en | |
| dc.subject | 磷光 | zh_TW |
| dc.subject | 有機發光元件 | zh_TW |
| dc.subject | 有機發光二極體 | zh_TW |
| dc.subject | 混合層結構 | zh_TW |
| dc.subject | 劣化 | zh_TW |
| dc.subject | OLED | en |
| dc.subject | organic light-emitting device | en |
| dc.subject | phosphorescent | en |
| dc.subject | degradation | en |
| dc.subject | mixed host | en |
| dc.title | 尖端有機發光元件結構之研究 | zh_TW |
| dc.title | Research on Advanced Organic Light-Emitting Devices Structure | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 95-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 梁文傑(Man-Kit Leung),陳錦地(Chin-Ti Chen),王俊凱(Juen-Kai Wang) | |
| dc.subject.keyword | 有機發光元件,有機發光二極體,混合層結構,劣化,磷光, | zh_TW |
| dc.subject.keyword | organic light-emitting device,OLED,mixed host,degradation,phosphorescent, | en |
| dc.relation.page | 87 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2007-07-31 | |
| dc.contributor.author-college | 電機資訊學院 | zh_TW |
| dc.contributor.author-dept | 光電工程學研究所 | zh_TW |
| 顯示於系所單位： | 光電工程學研究所 | |
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