本文選題：磷光 + 雙極主體�。� 參考：《陜西師范大學》2015年碩士論文

【摘要】：集結(jié)了液晶和無機LED(Light-Emitting Diodes)優(yōu)勢的有機電致發(fā)光器件(Organic Light-Emitting Diodes,OLEDs),被人們普遍認為是新世紀最具潛力的顯示照明技術(shù)。有機電致發(fā)光器件的未來研究重心是從熒光電致發(fā)光轉(zhuǎn)向磷光電致發(fā)光因其有著實現(xiàn)100%的內(nèi)部量子效率的可能性。跟熒光電致發(fā)光材料相比,磷光材料的三線態(tài)激子壽命較長,極易引發(fā)三線態(tài)-三線態(tài)湮滅及三線態(tài)-極化子淬滅而影響器件的效率,因此,磷光器件需采用主客體結(jié)構(gòu)才能在將來的平板顯示和固態(tài)照明行業(yè)開拓更加廣闊的天地。雙極傳輸主體材料是磷光OLEDs(PHOLEDs)最有潛力的主體材料之一。本論文通過引入柔性間隔基團,削弱分子給受體間的π-共軛效應(yīng)以增加材料三線態(tài)能級和分子成膜穩(wěn)定性,分別選用嗯二唑和均三嗪為電子傳輸單元,三苯胺和咔唑為空穴傳輸單元設(shè)計合成一系列新型雙極傳輸主體材料,并通過結(jié)構(gòu)鑒定、光物理分析以及各種手段來研究這類主體材料的各類性質(zhì)。各章的主要內(nèi)容如下：第一章是文獻綜述。首先簡要介紹了有機電致發(fā)光的相關(guān)基礎(chǔ)知識,包括發(fā)展史、發(fā)光機理、基本器件結(jié)構(gòu)、各功能層的相關(guān)材料等。然后從載流子傳輸?shù)慕嵌染C述了近幾年來幾類主體材料研究進展。其中,重點介紹了當前通過新型連接方式設(shè)計合成的一些綜合性能優(yōu)良的雙極主體材料的思路、方法、主要成果和存在的問題,最后,闡述了本論文的總體設(shè)計思想。第二章通過Suzuki反應(yīng)等合成了兩種具有鮮明對比結(jié)構(gòu)的雙極主體化合物2-(4-(3,5-雙(9-咔唑基)苯基)苯基)-4,6-二苯基-1,3,5-三嗪(mCP-TRZ)和2-(4-(3-(3,5-雙(9-咔唑基)苯基)丙基)苯基)-4,6--苯基-1,3,5-三嗪(mCP-L-TRZ)。它們的玻璃化溫度分別為160.65℃和103.26-C,在熱穩(wěn)定性上較之單純的mCP和TRZ大有提升；它們的三線態(tài)能級分別為2.6 eV和2.9 eV,顯然mCP-L-TRZ更適合用于藍色磷光主體,說明mCP-L-TRZ采用的新型連接方式削弱了給受體間的電荷轉(zhuǎn)移而保持了其較高的三線態(tài)能級。這一系列實驗結(jié)果支持了本文的分子結(jié)構(gòu)設(shè)計能同時提高主體材料的傳能性質(zhì)和發(fā)光膜的穩(wěn)定性的預(yù)期設(shè)想。第三章通過鄰、對位的連接方式,將空穴傳輸?shù)娜桨穯卧碗娮觽鬏數(shù)泥哦騿卧B接起來,合成了兩種主體化合物,并通過核磁氫譜等對它們的結(jié)構(gòu)進行鑒定。對兩化合物進行紫外-可見吸收光譜,熒光發(fā)射光譜研究,兩化合物吸收峰的對比初步驗證了鄰位連接能降低分子內(nèi)電荷轉(zhuǎn)移的設(shè)想。第四章為全文總結(jié)和展望,總結(jié)了論文的主要實驗結(jié)論,并在本論文工作的基礎(chǔ)上對有機電致磷光主體材料的研究進行了展望。
[Abstract]:Organic Light-Emitting Diodes, which have the advantages of liquid crystal and inorganic LEDX Light-Emitting Diodes, are widely regarded as the most promising display lighting technology in the new century. The focus of future research on organic electroluminescent devices is from fluorescent electroluminescence to phosphorescent electroluminescence because of its possibility of achieving 100% internal quantum efficiency. Compared with the fluorescent electroluminescent material, the phosphorescent material has a longer lifetime of the three-wire exciton, which can easily lead to the three-wire state annihilation and the three-line state polaron quenching, which affects the efficiency of the device. Phosphorescence devices need to adopt host and guest structure in order to expand the future flat panel display and solid state lighting industry. Bipolar transport host material is one of the most promising host materials for phosphorescence OLEDsPHOLEDs. In this paper, by introducing flexible spacer groups, the 蟺 -conjugation effect between the receptors is weakened to increase the energy level of the three-wire state and the stability of the molecular film formation, using hmdiazole and m-triazine as the electron transport units, respectively. A series of novel bipolar transport host materials were designed and synthesized by trianiline and carbazole as hole transport units, and their properties were studied by means of structural identification, photophysical analysis and various means. The main contents of each chapter are as follows: the first chapter is a literature review. Firstly, the basic knowledge of organic electroluminescence is briefly introduced, including the history of development, the mechanism of luminescence, the structure of basic devices, the related materials of each functional layer, etc. Then, the research progress of several kinds of main materials in recent years is reviewed from the point of view of carrier transport. Among them, the ideas, methods, main achievements and existing problems of some bipolar materials with excellent comprehensive performance are introduced in detail. Finally, the overall design idea of this paper is expounded. In chapter 2, two novel bipolar compounds with distinct contrasting structures, 2-CP-CP-TRZ) and 2-PH-4CP-TRZ) were synthesized by means of Suzuki reaction, respectively. Two novel bipolar compounds with distinct structures were synthesized, namely, 2-diphenyl-4-pyrrolidene, 6-diphenyl, 6-diphenyl, 3-triazine-3-triazinone, 3-triazolyl) propyl) -4N, 6-diphenyl, 1-triazine-5-triazinone, mCP-L-TRZ. Their glass transition temperatures are 160.65 鈩，

本文編號：1996285