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| ???org.dspace.app.webui.jsptag.ItemTag.dcfield??? | Value | Language |
|---|---|---|
| dc.contributor.advisor | 吳忠幟 | |
| dc.contributor.author | Ting-An Lin | en |
| dc.contributor.author | 林庭安 | zh_TW |
| dc.date.accessioned | 2021-07-11T14:38:37Z | - |
| dc.date.available | 2022-08-29 | |
| dc.date.copyright | 2017-08-29 | |
| dc.date.issued | 2017 | |
| dc.date.submitted | 2017-07-18 | |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/77971 | - |
| dc.description.abstract | 有機發光二極體已被視為重要的顯示技術與照明技術，所以元件效率備受重視，尤其藍光與白光元件是近期在學術研究上探討的重點。因此在本篇論文中，我們針對新穎的熱激活化延遲螢光材料做光物理與電性上的分析，並進一步製作高效率的藍光與白光有機發光元件。
在論文的第一部份，我們針對新穎的acridine-triazine系列材料進行光物理的分析，得知它們為高效率的熱激活化延遲螢光(TADF)藍光發光材料。其中SpiroAC-TRZ具有接近理想的100%量子效率(PLQY)和很高的水平偶極方向性(horizontal dipole ratio)。在仔細優化元件的電性及光學特性下，製成的藍光元件其外部量子效率可高達37%，是目前熱激活化延遲螢光有機發光元件及各種藍光有機發光元件當中，效率最高的紀錄。 第二部分我們利用SpiroAC-TRZ很好的藍光光物理以及元件特性，將SpiroAC-TRZ與其他紅光的磷光有機發光材料同時摻雜在單一發光層中，製作出外部量子效率超過32%的白光有機發光元件。 | zh_TW |
| dc.description.abstract | Organic light-emitting diodes (OLEDs) have become an important technology for display and lighting applications. To enhance OLED performances for various applications, continuously improving efficiencies of blue and white OLEDs (WOLEDs) is critical. In this thesis, we focused on the investigation of high performance organic light-emitting materials and device architectures based on thermally activated delayed fluorescence (TADF).
In the first part, we investigated detailed photophysical properties of molecular materials based on the acridine-triazine hybrid. Our studies indicate they are highly efficient TADF emitters. Therein, SpiroAC-TRZ has unitary photoluminescence quantum yield (PLQY) and strongly horizontally oriented emitting dipoles simultaneously. It can be used to fabricate extremely efficient blue OLED with external quantum efficiency (EQE) of nearly 37%, by far the highest ever reported for TADF OLEDs and for all kinds of blue OLEDs. In the second part, we develop WOLEDs based on the extremely efficient blue OLED by incorporating SpiroAC-TRZ and other red phosphorescent emitters into a single-emitting layer (S-EML) device architecture. With the promising characteristics of SpiroAC-TRZ, WOLEDs with EQE exceeding 32% were obtained. | en |
| dc.description.provenance | Made available in DSpace on 2021-07-11T14:38:37Z (GMT). No. of bitstreams: 1 ntu-106-R05943055-1.pdf: 2538837 bytes, checksum: aa747258fbe0c4336382fd77640339b5 (MD5) Previous issue date: 2017 | en |
| dc.description.tableofcontents | 誌謝 i
摘要 iii Abstract iv List of Tables vii List of Figures viii Chapter 1 Introduction 1 1.1 Overview of Organic Light-Emitting Devices 1 1.2 Thermally Activated Delayed Fluorescent Materials for OLEDs 4 1.3 Thesis Motivation and Organization 7 Figures of Chapter 1 8 Chapter 2 Sky-Blue Organic Light-Emitting Diode with 37% External Quantum Efficiency Using Thermally Activated Delayed Fluorescence from Spiroacridine-Triazine Hybrid 10 2.1 Introduction 10 2.2 Methods 12 2.2.1 Materials 12 2.2.2 Photophysical Characteristics 14 2.2.3 Thermal Properties 15 2.2.4 Emitting Dipole Orientation 16 2.2.5 Device Fabrication and Characterization 17 2.2.6 Optical Simulation 18 2.3 Results and Discussion 20 2.3.1 Photophysical Characteristics 20 2.3.2 Thermal Stability 23 2.3.3 Emitting Dipole Orientation 24 2.3.4 Device Characteristics 26 2.3.5 Optical Simulation and Discussion 29 2.4 Summary 32 Tables of Chapter 2 33 Figures of Chapter 2 35 Chapter 3 Efficient White Organic Light-Emitting Diodes Combining TADF and Phosphorescent Emitters 49 3.1 Introduction 49 3.2 Methods 52 3.2.1 Materials 52 3.2.2 Photophysical Characteristics 52 3.2.3 Device Fabrication and Characterization 54 3.3 Results and Discussion 56 3.3.1 Photophysical Characteristics 56 3.3.2 Device Characteristics 58 3.4 Summary 62 Tables of Chapter 3 63 Figures of Chapter 3 65 Chapter 4 Summary 71 References 73 | |
| dc.language.iso | en | |
| dc.subject | 水平電偶極矩 | zh_TW |
| dc.subject | 有機發光元件 | zh_TW |
| dc.subject | 白光有機發光元件 | zh_TW |
| dc.subject | 熱激活化延遲螢光 | zh_TW |
| dc.subject | white OELDs | en |
| dc.subject | thermally activated delayed fluorescence | en |
| dc.subject | OLEDs | en |
| dc.subject | dipole orientations | en |
| dc.title | 應用新穎藍光熱激活化延遲螢光材料之高效率藍光及白光有機發光元件 | zh_TW |
| dc.title | Efficient Blue and White Organic Light-Emitting Diodes Based On Advanced Blue-Emitting Thermally Activated Delayed Fluorescent Emitter | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 105-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 汪根欉,陳俐吟,蔡志宏 | |
| dc.subject.keyword | 有機發光元件,白光有機發光元件,熱激活化延遲螢光,水平電偶極矩, | zh_TW |
| dc.subject.keyword | OLEDs,white OELDs,thermally activated delayed fluorescence,dipole orientations, | en |
| dc.relation.page | 76 | |
| dc.identifier.doi | 10.6342/NTU201701688 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2017-07-19 | |
| dc.contributor.author-college | 電機資訊學院 | zh_TW |
| dc.contributor.author-dept | 電子工程學研究所 | zh_TW |
| Appears in Collections: | 電子工程學研究所 | |
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| ntu-106-R05943055-1.pdf Restricted Access | 2.48 MB | Adobe PDF |
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