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標題: | 具熱激活化延遲螢光或圓偏振光分子之設計與合成及其自組裝奈米結構之鑑定與應用 Synthesis and Characterizations of Self-assembled Nanostructures for OLED devices with Thermally Activated Delayed Fluorescence or Circularly Polarized Luminescence |
作者: | 謝育佑 Yu-Yu Hsieh |
指導教授: | 汪根欉 Ken-Tsung Wong |
關鍵字: | 超分子化學,有機發光二極體,熱激活化延遲螢光,圓偏振光,聚集體, supramolecular chemistry,OLED,TADF,circularly polarized emission,aggregates, |
出版年 : | 2022 |
學位: | 博士 |
摘要: | 自組裝是一種有趣的方法,能透過合理設計,將有機分子組成各種機能性奈米材料,並於眾多光電材料的應用中扮演關鍵角色。 在本論文的第一章,我們會簡述自組裝的概念與回顧超分子機能性有機材料的發展。第二章則設計一系列 D-π-A 架構的熱激活化延遲螢光 (TADF) 分子,調控拉電子基團強度,使放光波長從綠到黃橙色,並藉由引入雙縮脲自組裝基團,使之能自發形成大小均勻的螢光奈米囊泡。與傳統螢光分子相比,其電致發光元件最大外部量子效率提升近5到10倍,並導入噴墨印刷技術,製成微米級解析度的大面積發光元件,兼顧高解析度與優化的元件表現。第三章在不同的不對稱發色團上,如具軸手性的1,1'-雙萘 (1,1'-binaphthalene)、手性3,4-伸烷基二氧噻吩 (3,4-alkylenedioxythiophene) 與手性反式環己基衍生物 (trans-cyclohexyl derivatives),橋接上雙縮脲基團,使之自組裝形成規則有序的聚集結構,進而增強其於基態與激發態的旋光性質。第四章則設計一系列具軸手性的咔唑 (carbazole) 分子,作為電洞傳輸材料應用於圓偏振激發錯合物 (circularly polarized exciplex),來提升圓偏振光 (CPL) 強度,並根據材料能階,找出潛在的激發錯合物系統,進而探討其於薄膜態的光物理與旋光性質。 Self-assembly is a promising approach to organize functional organic nanomaterials from the molecular level using molecular design. It plays a critical role in diverse opto-electronic applications where it contributes to structuring the active layer. In Chapter 1, we introduce the concept of self-assembly and the developments of supramolecular organic functional materials. In Chapter 2, we design systems consisting of D-π-A type TADF chromophores and biuret molecular recognition motifs that combine tunable emission wavelength with the spontaneous formation of well-defined spherical aggregates. Electroluminescent devices using these TADF materials capable of harvesting triplet excitons exhibit 5- to 10-times greater external quantum efficiencies compared to analogous systems without TADF behavior while retaining the formation of sub-micron sized emissive domains. In Chapter 3, we combine biuret motifs with various chiral chromophores, such as axially chiral 1,1'-binaphthalenes, chiral 3,4-alkylenedioxythiophenes and chiral E-cyclohexyl derivatives, to self-assemble into ordered aggregates to amplify the chiroptical properties in the ground and excited state. In Chapter 4, we synthesize a series of carbazole-based derivatives with axially chirality in application of circularly polarized exciplex to enhance the intensity of circularly polarized luminescence through charge transfer process and probe several candidate exciplex systems to investigate their photophysical and chiroptical properties in films. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/86248 |
DOI: | 10.6342/NTU202202738 |
全文授權: | 同意授權(全球公開) |
電子全文公開日期: | 2024-08-30 |
顯示於系所單位: | 化學系 |
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ntu-110-2.pdf 此日期後於網路公開 2024-08-30 | 18.89 MB | Adobe PDF |
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