本文關(guān)鍵詞： 有機發(fā)光二極管 藍(lán)光主體 咔唑 三線態(tài)　出處：《蘇州大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：有機發(fā)光二極管是二十世紀(jì)末興起的新技術(shù),具有強大的生命力。有機發(fā)光二極管可以應(yīng)用在顯示和照明領(lǐng)域,相比于傳統(tǒng)的顯示照明技術(shù),有機發(fā)光二極管具有輕薄、發(fā)光色度純正、可視角寬、響應(yīng)速度快、可制作成柔性器件或者透明器件、大面積和色彩艷麗等特點,市場應(yīng)用廣泛。在使用了磷光發(fā)光客體材料之后,有機發(fā)光二極管的內(nèi)量子效率更是達(dá)到了100%。只是磷光客體材料在高濃度下存在淬滅現(xiàn)象,需要摻雜到主體材料中使用。目前,紅色和綠色磷光器件的效率和壽命都已經(jīng)達(dá)到了實用化的標(biāo)準(zhǔn),要完全實現(xiàn)全彩顯示和白光照明,必須進一步解決藍(lán)色磷光器件的效率和壽命問題。由于藍(lán)光客體材料自身的三線態(tài)較高,因此要求與之相匹配的主體材料以及相應(yīng)的空穴電子傳輸材料都具有更高的三線態(tài),由此帶來了材料設(shè)計與合成上的困難。本文主要通過簡單的分子設(shè)計,合成了結(jié)構(gòu)簡單但兼具高三線態(tài)和玻璃化轉(zhuǎn)變溫度的藍(lán)光主體材料,并將這些主體材料應(yīng)用到藍(lán)色磷光器件中,實現(xiàn)了器件的高效發(fā)光。同時本文也對材料的化學(xué)結(jié)構(gòu)、熱穩(wěn)定性、光物理性質(zhì)、電化學(xué)性質(zhì)進行了詳細(xì)的研究。我們還采用密度泛函理論對設(shè)計的分子進行了模擬,模擬計算的結(jié)構(gòu)與實驗結(jié)果符合得很好。本文為設(shè)計高效的藍(lán)光主體材料提供了切實可行的方法,具體如下：1.本文設(shè)計并合成了基于閉環(huán)二苯醚和膦氧基團的主體材料DPPO,合成方法簡便并且應(yīng)用到了目前報道的新的合成方法。低溫磷光發(fā)射光譜測試表明該化合物具有較高的三線態(tài)(2.88 eV),它可以作為天藍(lán)色磷光發(fā)光材料雙(4,6-二氟苯基吡啶-N,C2)吡啶甲酰合銥(Bis(3,5-difluoro-2-(2-pyridyl)phenyl-(2-carboxypyridyl) iridium (Ⅲ), FIrpic, ET=2.65 eV)的主體材料。我們將主體材料DPPO用于藍(lán)色磷光有機發(fā)光二極管中,該器件在100 cd/m2的亮度下,電流效率和流明效率分別達(dá)到30.6 cd/A和19.21m/W,最大外量子效率達(dá)到13.6%。2.本文采用新型的打斷共軛的二甲基苯基元,設(shè)計并合成了兩種基于咔唑的主體材料DMCz和TMCz。兩個材料都具有很高的玻璃化轉(zhuǎn)變溫度(120℃)和足夠高的三線態(tài)(2.7 eV),可以作為天藍(lán)色發(fā)光客體FIrpic的主體材料。其中,以DMCz為主體材料的藍(lán)光器件,最大功率效率為37.9 lm/W,最大電流效率為43.7 cd/A,最大的外量子效率為17.8%,并且在大電流下的效率滾降小于5%。
[Abstract]:Organic light emitting diode is a new technology at the end of the twentieth Century rise, has strong vitality. The organic light emitting diode can be used in the fields of display and lighting, lighting technology compared to the traditional display, organic light emitting diode with a thin, light color pure, wide visual angle, fast response speed, can be made into flexible devices or transparent devices, large area and colorful characteristics, the market is widely used. In the use of the phosphorescent material object, the internal quantum efficiency of organic light emitting diode is reached only 100%. object material at a high concentration of phosphorescence quenching phenomenon exists, need to use the main material in doping. At present, the efficiency and life of the red and green phosphorescent devices have reached the practical standards, to fully realize the full-color display and white light illumination, must further solve the problem of blue phosphorescent device efficiency and service life. The three line state high material Blu ray object itself, so the match with the main material and the corresponding hole electron transport materials have a higher three line state, which brings difficulties on the design and synthesis of materials. This paper mainly through the molecular design is simple, the structure is simple but both synthetic blue host materials triplet and the glass transition temperature, and the application of these materials to the main body of blue phosphorescent device, device efficient luminescence is realized. At the same time, the chemical structure of the material, thermal stability, optical properties, electrochemical properties were studied in detail. We use density functional theory to simulate the design the molecular structure, simulation calculation and experimental results agree well. This paper provides a feasible method for the design of efficient blue host materials are as follows: 1. in this paper. The design and synthesis loop two phenyl ether phosphine oxide group and main material based on DPPO, the synthesis method is simple and applied to the new synthetic methods reported. Low temperature phosphorescence emission spectra showed that the compound has a higher three state line (2.88 eV), it can be used as blue phosphorescent materials (double 4,6- two fluorine phenyl pyridine -N, C2) pyridine methanoyl iridium (Bis (3,5-difluoro-2- (2-pyridyl) phenyl- (2-carboxypyridyl) iridium (III), FIrpic, ET=2.65, eV) of the main material. We will be the main material DPPO for blue phosphorescent organic light emitting diode, the device in the brightness of 100 cd/m2, current efficiency and power efficiency reached 30.6 cd/A and 19.21m/W, the maximum external quantum efficiency of 13.6%.2. using new interrupt conjugated methyl phenyl two yuan, designed and synthesized two kinds of carbazole main material DMCz and TMCz. materials based on two Have a high glass transition temperature (120 DEG C) and high enough three linewise (2.7 eV), can be used as blue light-emitting guest FIrpic main material. Among them, with DMCz as the main material of the blue light device, the maximum power efficiency of 37.9 lm/W, the maximum current efficiency is 43.7 CD /A, external quantum the maximum efficiency is 17.8%, and the efficiency at high current roll off less than 5%.

【學(xué)位授予單位】：蘇州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TQ422;TN383.1
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本文編號：1527234