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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 李君浩(Jiun-Haw Lee) | |
| dc.contributor.author | Cheng-Pin Chen | en |
| dc.contributor.author | 陳政斌 | zh_TW |
| dc.date.accessioned | 2021-06-16T09:21:53Z | - |
| dc.date.available | 2020-08-29 | |
| dc.date.copyright | 2017-08-29 | |
| dc.date.issued | 2017 | |
| dc.date.submitted | 2017-06-27 | |
| dc.identifier.citation | [1] Tang, C. W., VanSlyke, S. A., and Chen, C. H., J. Appl. Phys., 1989, 65, 3610-3616.
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/59375 | - |
| dc.description.abstract | 本篇論文研究主題有二。其一為以四苯基矽烷衍生物為主體材料製作高效率藍色磷光與綠色熱活化延遲螢光有機發光二極體，其二為運用具施體-受體-受體分子構型之發光材料製作長波長放光元件。
我們利用臺大化學所梁文傑實驗室提供的四種四苯基矽烷衍生物為主體材料製作高效率有機發光二極體。該四種化合物以高三重態能量的四苯基矽烷作為分子核心，連接具電洞傳輸特性的咔唑基團和具電子傳輸特性的咔啉基團期望達到雙極性載子傳輸特性。在這四種化合物中，9-(4-((4-(9H-pyrido[2,3-b]indol-9-yl)phenyl)diphenylsilyl)phenyl)-9H-pyrido[2,3-b]indole (Dialpha-CbSi) 在元件發光層中提供較佳的電子電洞平衡因而達到最高的元件效率。藉由調變客發光體材料摻雜濃度及元件內各膜層厚度，在Dialpha-CbSi中摻雜bis[2-(4,6-difluorophenyl)pyridinato-C2,N](picolinato)iridium(III) (FIrpic)之藍色磷光有機發光二極體其最佳電流效率、功率效率和外部量子效率分別為57.17 cd/A、51.31 lm/W和26.35%。而在Dialpha-CbSi中摻雜2,4,5,6-tetrakis(carbazol-9-yl)-1,3-dicyanobenzene (4CzIPN)之綠色熱活化延遲螢光有機發光二極體其最佳電流效率、功率效率和外部量子效率分別為83.59 cd/A、75.03 lm/W和23.73%。 我們將臺大化學所汪根欉實驗室提供具施體-受體-受體分子構型之發光材料7-(4-(di-p-tolylamino)phenyl)benzo[c][1,2,5]thiadiazole- 4-carbonitrile (DTCPB)導入不同的主體發光體系統製作長波長放光元件，包含螢光主體系統、激發錯合物主體系統及熱活化延遲螢光輔助主體系統。在熱活化延遲螢光輔助主體系統中摻雜1%的DTCPB使元件放光頻譜峰值落在623 nm並具有6.67%的外部量子效率。 | zh_TW |
| dc.description.abstract | There are two topics in this thesis. The first one is high efficiency blue phosphorescent and green thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs) using tetraphenylsilane derivatives as host materials. The second is organic light-emitting diodes with long wavelength emission (near infrared (NIR) to red) by employing an emitting material with donor-acceptor-acceptor molecular configuration.
We used four tetraphenylsilane derivatives, which are supplied by Prof. Man-Kit Leung’s group, as host materials for high efficiency OLEDs. These compounds have a high-triplet-energy tetraphenylsilane as core, jointed with hole-transporting carbazole and electron-transporting carboline substituents. Among the four compounds, device using 9-(4-((4-(9H-pyrido[2,3-b]indol-9-yl)phenyl)diphenylsilyl)phenyl)-9H-pyrido[2,3-b]indole (Dialpha-CbSi) as host material has highest efficiency due to good charge balance in the emitting layer (EML). By optimizing dopant concentration, thickness of electron transporting layer (ETL) and EML, the Dialpha-CbSi-based OLEDs achieve 57.17 cd/A, 51.31 lm/W and 26.35% in current efficiency, power efficiency and external quantum efficiency (EQE) with blue phosphor dopant, bis[2-(4,6-difluorophenyl)pyridinato-C2,N](picolinato)iridium(III) (FIrpic), while achieving 83.59 cd/A, 75.03 lm/W and 23.73% in current efficiency, power efficiency and EQE with green thermally activated delayed fluorescent (TADF) dopant, 2,4,5,6-tetrakis(carbazol-9-yl)-1,3-dicyanobenzene (4CzIPN). We introduced a donor-acceptor-acceptor molecular configuration emitter, 7-(4-(di-p-tolylamino)phenyl)benzo[c][1,2,5]thiadiazole-4-carbonitrile (DTCPB), which is supplied by Prof. Keng-Tsung Wong’s group, into fluorescent, exciplex and TADF assistant host matrixes for pursuing long wavelength emission. By incorporating 4CzIPN as TADF assistant host, the OLED doped with 1% DTCPB has an emission peak wavelength of 623 nm and red EQE of 6.67%. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-16T09:21:53Z (GMT). No. of bitstreams: 1 ntu-106-R03941022-1.pdf: 11800740 bytes, checksum: 81cd6d1c89677888cd05e5b0a43c0475 (MD5) Previous issue date: 2017 | en |
| dc.description.tableofcontents | Contents
摘要 I Abstract II Contents IV List of figures VII List of tables XV Chapter 1 Introduction 1 1.1 Host-guest system in OLED 2 1.2 Host materials for phosphorescent and TADF OLED 2 1.2.1 Phosphorescence and TADF OLED 2 1.2.2 Tetraphenylsilane derivatives as the host of the blue phosphorescent OLED 6 1.2.3 Carboline derivatives as the host of the blue phosphorescent OLED 12 1.3 OLEDs with long wavelength emission 15 1.3.1 Long-wavelength emission 15 1.3.2 Donor-acceptor type chromophores 16 1.3.3 Fluorophore with incorporation of exciplex host 20 1.3.4 Fluorophore with incorporation of TADF assistant dopant 22 1.4 Motivation 23 1.5 References 25 Chapter 2 Experiments 31 2.1 Device fabrication 31 2.2 Measurement systems 32 2.2.1 Brightness-current density-voltage characteristics, external quantum efficiency (EQE), and operation lifetime measurements 32 2.2.2 Transient electroluminescence (TrEL) measurement 33 2.2.3 Photoluminescence quantum yield (PLQY) measurement 34 2.3 References 36 Chapter 3 Tetraphenylsilane derivatives as hosts for blue phosphorescent and green TADF OLED 37 3.1 Introduction 37 3.2 Photophysical properties 39 3.3 Blue PhOLEDs with tetraphenylsilane derivatives as hosts 42 3.3.1 Device performances of the OLED with four tetraphenylsilane derivatives as the hosts 42 3.3.2 HOD and EOD of Alpha-CbSiCz and Dialpha-CbSi 48 3.4 Green TADF OLEDs with tetraphenylsilane derivatives as hosts 50 3.5 Comparison between blue PhOLEDs and green TADF OLEDs with Dialpha-CbSi as host 54 3.6 Optimization of blue PhOLEDs with Dialpha-CbSi as host 59 3.6.1 Tuning FIrpic doping concentration 59 3.6.2 Tuning the thickness of ETL 63 3.6.3 Tuning the thickness of EML 66 3.6.4 Probing the recombination zone in the EML of optimized PhOLED 70 3.7 Optimization of blue PhOLEDs with Alpha-CbSiCz as host 75 3.7.1 Tuning FIrpic doping concentration 76 3.7.2 Tuning the thickness of ETL 80 3.7.3 Tuning the thickness of EML 84 3.7.4 Probing the recombination zone in the EML of optimized PhOLED 88 3.8 Investigating FIrpic doping concentration with Beta-CbSiCz and Gamma-CbSiCz 92 3.8.1 Tuning FIrpic doping concentration with Beta-CbSiCz as host 92 3.8.2 Tuning FIrpic doping concentration with Gamma-CbSiCz as host 97 3.9 Optimization of green TADF OLEDs with Dialpha-CbSi as host 103 3.9.1 Tuning 4CzIPN doping concentration 103 3.9.2 Tuning the thickness of ETL 107 3.9.3 Tuning the thickness of EML 111 3.10 References 115 Chapter 4 OLED with donor-acceptor-acceptor fluorophore 116 4.1 Introduction 116 4.2 Comparison between different host systems 117 4.2.1 EQE optimization 118 4.2.2 Pursuit of long wavelength emission 122 4.2.3 Photoluminescence quantum yield of DTCPB 125 4.3 Alq3:DTCPB as the EML 129 4.3.1 Doping concentration of DTCPB 129 4.3.2 Tuning the thickness of ETL 137 4.3.3 Tuning the relative thickness of EML and ETL 142 4.4 BPhen:DTCPB as the EML 145 4.5 Non-doped DTCPB OLEDs 150 4.6 Exciplex host matrix 155 4.6.1 m-MTDATA and BPhen exciplex 156 4.6.2 TCTA and 3P-T2T exciplex 160 4.6.3 TCTA and 3P-T2T exciplex with thin DTCPB insertion layer 166 4.7 TADF assistant dopant matrix 171 4.8 References 177 Chapter 5 Summary 178 Appendix Table of detail usage of DPPS 180 | |
| dc.language.iso | en | |
| dc.subject | 施體-受體-受體分子 | zh_TW |
| dc.subject | 有機發光二極體 | zh_TW |
| dc.subject | 四苯基矽烷 | zh_TW |
| dc.subject | 主體材料 | zh_TW |
| dc.subject | donor-acceptor-acceptor molecule | en |
| dc.subject | Organic light-emitting diode | en |
| dc.subject | tetraphenylsilane | en |
| dc.subject | host material | en |
| dc.title | 以四苯基矽烷主體材料及施體-受體-受體發光材料製作有機發光二極體之研究 | zh_TW |
| dc.title | Researches on organic light-emitting diodes with tetraphenylsilane hosts and donor-acceptor-acceptor emitter | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 105-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 梁文傑(Man-Kit Leung),汪根欉(Ken-Tsung Wong),邱天隆(Tien-Lung Chiu),林奇鋒(Chi-Feng Lin) | |
| dc.subject.keyword | 有機發光二極體,四苯基矽烷,主體材料,施體-受體-受體分子, | zh_TW |
| dc.subject.keyword | Organic light-emitting diode,tetraphenylsilane,host material,donor-acceptor-acceptor molecule, | en |
| dc.relation.page | 181 | |
| dc.identifier.doi | 10.6342/NTU201701152 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2017-06-28 | |
| 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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