具聚集發光及電活性三苯胺衍生物之合成與性質研究及其在電變色發光元件之應用

Synthesis and Characterization of AIE- and Redox- Active Novel Triphenylamine Derivatives for Electrofluorochromic Device Application

林湘庭(Hsiang-Ting Lin)

指導教授 ： 劉貴生

國立臺灣大學/工學院/高分子科學與工程學研究所/碩士(2018年)

https://doi.org/10.6342/NTU201803961

摘要

本論文包含四個章節，第一章為三苯胺材料之總體緒論。第二章描述將兩種不同聚集發光基團(三苯乙烯與苯并噻吩砜)與三苯胺及其衍生物結合，制備四種具有聚集發光與電活性之三苯胺衍生物。其化合物的溶液態皆呈現低量子效率(Ф=0.2%~4%)，反之固態具有高量子發光效率(Ф=25.3%~98.3%)特性。經過500圈的穩定度測試後，三苯胺含雙甲氧基衍生物表現傑出的電穩定性，使其適合應用於電致變色發光元件。此外為了提升電致變色發光元件的效能，陰極材料-庚基紫精做為電荷儲存層，有效降低工作電壓與元件開關的反應時間。
第三章探討TPPA、TPB、NTPPA及NTPB四個化合物的螢光性質，其中分子具有聯苯結構的化合物(TPB與NTPB)呈現突出的螢光性質。NTPB為具有聚集發光特性的化合物，溶液態近乎無光(Ф=1.7%)，然而在固態時放出綠色強光(Ф=29.5%)。TPB分子具有獨特光學性質，不論在溶液態(Ф=34.5%)或是固態(Ф=32.4%)皆具有高的量子效率。根據螢光檢測得結果，設計了不同型態的電解質與不同間隙的電致變色發光元件。
第四章為結論。本論文探討與比較三苯胺衍生物之基本特性、光致發光、電化學與電致螢光變色性質。由於其傑出的螢光性質與電化學行為，可應用於不同型態的元件上，增加應用的靈活性。

關鍵字

聚集發光 ； 三苯胺 ； 電致變色 ； 電致變色發光

並列摘要

This study has been separated into four chapters. Frist chapter is general introduction.
In second chapter, tirphenylamine and its derivatives were linked with two high performance AIE gens, triphenylethylene (TPE) or benzo[b]thiophene 1,1-dioxide (BTO), to obtain four AIE- and Redox- active molecules, which displayed low quantum yield (from 0.2% to 4%) in solution, oppositely high quantum yield (from 25.3% to 98.3%) in solid. TPAOMes display excellent electrochemical stability after 500 cyclic voltammetry scans and be candidate for fabricating EFC devices. Further, in order to improve EFC performance, a well-known cathodic material, heptyl viologen (HV), was further introduced into the EFC devices as charge balance agent to reduce the oxidative potential and the recovery time.
In next chapter, TPPA, TPB, NTPPA, and NTPB are investigated their fluorescent properties. The result demonstrated the molecule (TPB and NTPB) with diphenyl linkage show excellent fluorescent performance. NTPB expresses AIE-active properties, nearly no emission in solution (ФPL=1.7%) but strong green fluorescence in solid (ФPL=29.5%). Especially, TPB displays high quantum yield not only in solution (ФPL=34.5%) but also in solid state (ФPL=32.4%). In line with the fluorescent researches, we chose TPB to be EFC materials and design EFC devices with different type of electrolyte (solution and gel) and different gap (120 μm and 60 μm).
Finally, the last chapter is conclusions. The basic characterization, photoluminescent, electrochemical and electrofluorochromic behaviors of these triarylamine derivatives were investigated and compared. Thus, these triarylamine derivatives can be a candidate for different type device to increase the flexibility of application due to their outstanding fluorescent performance and excellent electrochromic behavior

並列關鍵字

AIE ； triphenylamine ； electrofluorochromism ； electrochromism

參考文獻

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