3,6雙取代咔唑與二聚茚噻吩分子的合成及光電應用

Abstract

我們利用簡易快速的合成路徑成功得到3,6雙取代咔唑分子CzC、CzCSi及DCzC。咔唑為常見的主體材料，因為三重態能階高，能有效將能量轉移至掺雜的藍光及綠光磷光材料中，使元件具高效能的表現。在3,6位置接上三苯環甲基或三苯環矽基，希望能夠限制其共軛長度，維持咔唑原本的高三重態能階，進而增加其熱穩定性，同時能有穩定且可逆的氧化電位，不致發生電聚合現象。 我們也合成了螢光RGB發光材料DPBS、DInT2(由古嵩煜學長合成)及DPDCIT，核心為梯形平面分子，擁有高量子產率、強烈螢光及快速的電荷移動速率等優點，藉由引入不同之推拉電子機團，可調控出紅藍綠之放光波長。

We designed and synthesized the molecules CzC, CzCSi, and DCzC that retain the large triplet energy of carbazole while improving the morphological stability by attaching non-conjugated and bulky substitutions (i.e., triphenylmethyl and/or triphenylsilyl groups) to C3 and C6 positions of carbazole. The molecular configuration presented in this thesis is also beneficial to give the compounds with extra electrochemical stability since the electrochemically active sites of carbazole are blocked. The applications of carbazole-based new host materials in blue electroluminescence have been investigated. We also synthesized the RGB-emitting fluorescent materials DPBS, DInT2, and DPDCIT based on ladder coplanar frameworks as core structures to afford desirable properties such as intense luminescence with high quantum yield and high carrier mobility. The molecular design of materials that can emit different colors were governed by the molecular geometry and the introduction of donor and acceptor moieties for efficient charge transfer emission.