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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 李君浩(Jiun-Haw Lee) | |
| dc.contributor.author | Yize Hsiao | en |
| dc.contributor.author | 蕭詒澤 | zh_TW |
| dc.date.accessioned | 2021-06-17T02:31:30Z | - |
| dc.date.available | 2022-08-25 | |
| dc.date.copyright | 2017-08-25 | |
| dc.date.issued | 2017 | |
| dc.date.submitted | 2017-08-17 | |
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Wu, “High-efficiency fluorescent blue organic light-emitting device with balanced carrier transport.” J. Electrochem. Soc. 154, J226, 2007. [32] H. A. Al-Attar and A. P. Monkman, “Electric field induce blue shift and intensity enhancement in 2D exciplex organic light emitting diodes; controlling electron–hole separation.” Adv. Mater. 28, 8014, 2016. [33] M. S. Kim, B. K. Choi, T. W. Lee, D. Shin, S. K. Kang, J. M. Kim, S. Tamura, and T. Noh, “A stable blue host material for organic light-emitting diodes.” Appl. Phys. Lett. 91, 251111, 2007. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/68706 | - |
| dc.description.abstract | 本研究有兩個主題，其一為複合受激態之有機發光二極體的效率提升。其二為複合受激態觸發三重態-三重態消滅藍色有機發光二極體之效率提升。
複合受激態 (Exciplex) 為兩有機材料，分別具電子施體與電子受體特性，在界面處形成激發態的錯合物。我們針對使用複合受激態之有機發光二極體，調變厚度與混合比例來優化，得到6.57 % 外部量子效率及20.95 lm/W 之功率效率。 再者為研究複合受激態觸發三重態-三重態消滅藍色有機發光二極體 (Exciplex sensitized triplet-triplet annihilation ,簡稱ESTTA)。此系統由複合受激態經能量傳遞給藍色三重態-三重態消滅 (Triplet-triplet annhiliation, 簡稱TTA) 發光體，產生上轉換 (Upconversion) 的放光。其效率可能因單重態激子猝熄而降低。故本章以兩種手段，改善此系統的能量傳遞路徑，增加藍光效率。其一為加入藍色螢光客體材料4,4'-bis[2-(4-(N,N-diphenylamino)phenyl)vinyl]biphenyl) (DPAVBi)，其二為插入 4,7-diphenyl-1,10-phenanthroline (BPhen) 作為三重態傳遞和單重態阻隔層 (Triplet diffusion and singlet blocking,簡稱TDSB)。在既摻雜客體材料亦插 TDSB 層之元件，能提升外部量子效率的藍色分量至2.316%。 上述研究皆屬於延遲型螢光放光，因此我們利用暫態電激發光 (Transient electroluminescence, 簡稱TrEL) 量測系統，來分析這種延遲放光。透過量測電訊號關掉後的電激放光，藉此研究激子於元件中的物理機制，以及能量轉移的過程。 | zh_TW |
| dc.description.abstract | There are two topics in this thesis. The first one is the optimization of exciplex-based organic light-emitting diode (OLED). The second part describes the methods to improve the efficiency of exciplex sensitized triplet-triplet annihilation (ESTTA) OLED.
When two organic materials act as electron donor and acceptor respectively and form the excited complexes at their interface, it is called exciplex. We optimized exciplex-based OLED to achieve higher efficiency by means of layer structure tuning. Finally, the power efficiency of 20.95 lm/W and external quantum efficiency (EQE) of 6.57% were obtained. Exciplex generated by two species could transfer its energy to triplet-triplet annihilation (TTA) blue emitter, and created energy upconversion blue emission afterwards. We called this process exciplex sensitized triplet-triplet annihilation (ESTTA). Here, two methods have been adopted to improve the efficiency, which were: (1) doping blue fluorescence dye: 4,4'-bis[2-(4-(N,N-diphenylamino)phenyl)vinyl]biphenyl) (DPAVBi), and (2) inserting 4,7-diphenyl-1,10-phenanthroline (BPhen) as “triplet diffusion and singlet blocking (TDSB)” layer. By employing dopant combined with TDSB layer, ESTTA-OLED increased its blue EQE to 2.316%. In these OLEDs, transient electroluminescence (TrEL) were employed to investigatet the carrier and exciton dynamics by measuring the turn-off responses. | en |
| dc.description.provenance | Made available in DSpace on 2021-06-17T02:31:30Z (GMT). No. of bitstreams: 1 ntu-106-R02941094-1.pdf: 5466262 bytes, checksum: d33488d9b05f4bf5fa512cccb6f24cc3 (MD5) Previous issue date: 2017 | en |
| dc.description.tableofcontents | 目錄 I
圖目錄 III 表目錄 X 第1章 緒論 1 1.1 OLED的基礎知識 1 1.2 Exciplex與TTA，以及利用兩者的ESTTA 7 1.3 實驗動機 12 第2章 製程及量測系統 13 2.1 簡介 13 2.2 元件製程 13 2.3 量測系統 15 2.3.1 穩態 B-J-V 量測 15 2.3.2 暫態電激發光 (Transient electroluminescence，TrEL) 量測系統 16 第3章 具備複合受激態發光層有機發光二極體之元件優化 17 3.1 實驗動機與本章簡介 17 3.2 調變電子傳輸層厚度 19 3.3 變化發光層厚度 22 3.4 調變發光層混合比例 26 第4章 複合受激態觸發三重態-三重態消滅有機發光二極體之效率提升 30 4.1 實驗動機與本章簡介 30 4.2 優化ESTTA元件厚度 34 4.2.1 增厚電子傳輸層 34 4.2.2 增厚電洞傳輸層 40 4.2.3 ESTTA/ TTA/ Exciplex 控制元件比較 45 4.3 加入 DPAVBi 藍光客體材料，調變摻雜濃度 50 4.4 插入BPhen作為 TDSB 層，調變插入厚度 57 4.5 固定 TDSB = 1 nm 並調變發光層與電子傳輸層厚度 65 4.6 同時摻雜客體材料及插入 TDSB 層 71 第5章 結論 76 參考資料 78 附錄 84 第三章複合受激態優化過程，剛復機完，曾做出高效率元件 84 | |
| dc.language.iso | zh-TW | |
| dc.title | 三重態-三重態消滅與複合受激態之有機發光二極體研究 | zh_TW |
| dc.title | Study of Triplet-triplet Annihilation and Exciplex-based Organic Light-emitting Diode | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 105-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 邱天隆(Tien-Lung Chiu),林奇鋒(Chi-Feng Lin) | |
| dc.subject.keyword | 有機發光二極體,複合受激態,三重態-三重態消滅,暫態電激放光, | zh_TW |
| dc.subject.keyword | Organic light-emitting diode (OLED),Exciplex,Triplet-triplet annihilation (TTA),Transient electroluminescence (TrEL), | en |
| dc.relation.page | 87 | |
| dc.identifier.doi | 10.6342/NTU201703767 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2017-08-18 | |
| 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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