本文關(guān)鍵詞：藍光磷光有機發(fā)光二極管主體材料的合成及表征　出處：《蘇州大學》2015年碩士論文　論文類型：學位論文

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【摘要】：有機發(fā)光二極管(Organic Light Emitting Diodes, OLED)在平板顯示和固態(tài)照明方面有很好的應(yīng)用前景,因此得到了來自學術(shù)界和工業(yè)界的廣泛關(guān)注。通過近三十年的發(fā)展,特別是在磷光有機發(fā)光二極管(PHOLED)的概念提出之后,OLED的效率有了極大的提高。現(xiàn)階段,紅光和綠光PHOLED的效率和壽命都已經(jīng)達到了可產(chǎn)業(yè)化的程度,但是藍光PHOLED的效率和壽命一直是OLED產(chǎn)業(yè)發(fā)展的短板,這就嚴重制約了OLED在全彩顯示和白光照明中的應(yīng)用。因此提高藍光PHOLED的效率和壽命是十分必要且有意義的課題。與綠光及紅光PHOLED相比,藍光PHOLED對主體材料的要求較高,主體材料性質(zhì)的優(yōu)化是提高藍光PHOLED效率的關(guān)鍵。所以本論文中涉及到的主要工作是基于1,2,4-VA二唑這種新型拉電子基團設(shè)計并將其應(yīng)用于蒸鍍器件中的主體材料,和應(yīng)用于旋涂器件中的電子傳輸型主體材料以及可應(yīng)用于旋涂器件的空穴傳輸型主體材料。本文為設(shè)計高三線態(tài)藍光PHOLED主體材料提供了一種新型的拉電子基團,主要內(nèi)容包括：1.基于1,2,4-VA二唑的對稱型磷光主體材料：與1,2,5-VA二唑和1,3,4-VA二唑相比1,2,4-VA二唑在有機光電領(lǐng)域還沒有得到充分的應(yīng)用,而且與前兩種基元相比,相當于間位鏈接的1,2,4-VA二唑應(yīng)該有更高的三線態(tài),這個優(yōu)點可以被利用來給藍光PHOLED設(shè)計高三線態(tài)的主體材料。所以在這一部分工作中,我們創(chuàng)新性的應(yīng)用了1,2,4-VA二唑作為拉電子基團,設(shè)計并合成了兩個雙極性主體材料,兩種材料的三線態(tài)分別為2.71 eV和2.81eV,可以做藍光客體材料FIrpic(雙(4,6-二氟苯基毗啶-N,C2')吡啶甲酰合銥)的主體。2.基于1,2,4-VA二唑的非對稱型磷光主體材料：在上一章中我們只是利用1,2,4-VA二唑本身的間位連接性質(zhì)得到了與1,3,4-VA二唑衍生物相比三線態(tài)較高的主體材料,使其可以應(yīng)用在藍光PHOLEDs中。在本章中我們著重研究了1,2,4-VA二唑單元本身的不對稱性對材料性質(zhì)的影響。在這一章中我們重新排列了分子的構(gòu)成單元然后合成了兩個新的不對稱主體材料,結(jié)構(gòu)上的細微變化使器件效率得到了極大的提高。3.基于1,2,4-嗯二唑的電子傳輸型旋涂磷光主體材料：盡管真空蒸鍍法制備OLEDs器件是常用的且十分成熟的方法,但是它本身就存在一些問題,例如材料利用率低,蒸鍍過程中測量的不準確性,裝置成本高,高真空度要求以及操作復(fù)雜等。旋涂法制備OLEDs器件的引入很好的解決了以上問題,但是旋涂器件中對材料的要求更高了。除了對傳統(tǒng)蒸鍍器件中材料的要求,旋涂材料的溶解性,溶液成膜性以及材料的玻璃化轉(zhuǎn)變溫度等都有較高的要求。雖然PVK搭配OXD-7的體系在旋涂器件中應(yīng)用十分廣泛,但是OXD-7的三線態(tài)只有2.69 eV,不能應(yīng)用在深藍光PHOLEDs中,所以在本章的工作中我們通過用1,2,4-嗯二唑取代1,3,4.嗯二唑的方式得到了兩種三線態(tài)更高的電子傳輸型主體材料,我們將這幾種材料應(yīng)用在深藍光PHOLEDs中。4.基于芴螺三苯胺的空穴傳輸型旋涂磷光主體材料：在上一章中,我們在保留PVK的基礎(chǔ)上,新合成了3種電子型的主體材料,但是用這些材料制作的器件的效率并不高,特別是器件的起始電壓比較高。我們認為是由于聚合物做主體的原因?qū)е碌钠鹗茧妷浩?所以在本章的工作中我們合成了一系列小分子空穴傳輸型材料。搭配電子傳輸型材料OXD-7制備了藍光旋涂PHOLEDs器件,與聚合物PVK做主體的器件相比,效率有了明顯的提高。
[Abstract]:Organic light emitting diode (Organic Light Emitting Diodes, OLED) has a good prospect of application in flat-panel display and solid-state lighting, so it has got extensive attention from academia and industry. Through nearly thirty years of development, especially in phosphorescent organic light emitting diode (PHOLED) after the concept was put forward, the efficiency of OLED is improved greatly. At present, the efficiency and life of red and green PHOLED has already reached the level of industrialization, but the efficiency and life of blue PHOLED has been a short board in the development of OLED industry, which seriously restricts the application of OLED in full-color display and white light illumination. Therefore, improving the efficiency and lifetime of Blu ray PHOLED is very necessary and meaningful. Compared with the green and red PHOLED, higher requirements for the main material of the blue PHOLED, optimization of the main properties of the material is to improve the efficiency of the blue PHOLED The key. So the main work of this paper is related to the 1,2,4-VA two with this new type of electron withdrawing group design based on its application in evaporation device of the main material, and electronic transmission type main materials used in the spin coating device and can be applied to the spin coating device hole transmission type main material in this paper. Provide a new type of electron withdrawing group for the design of triplet blue PHOLED main material, the main contents include: 1. the main symmetric phosphorescent material 1,2,4-VA two was based on: compared with 1,2,5-VA two and 1,3,4-VA two with 1,2,4-VA two with ribavirin has not been fully applied in the field of organic light and electricity, compared with the previous two based 1,2,4-VA yuan, the equivalent of a link between of two should have a higher three line state, this advantage can be utilized to design the blue PHOLED triplet of the main material. So in this part of the work In our innovative use of 1,2,4-VA two as with electron withdrawing group, and two bipolar host material was synthesized. Two materials three state line are respectively 2.71 eV and 2.81eV, can make the material object FIrpic (double blue (4,6- two fluorine phenyl pyridine -N, C2') pyridine methanoyl alloy the main body of.2.) iridium based on asymmetric phosphorescent material 1,2,4-VA two was: in the last chapter, we only use two of the 1,2,4-VA between properties have been compared with the 1,3,4-VA two derivatives three linewise high body material, which can be used in the Blu ray PHOLEDs. In this chapter we the effects of asymmetric 1,2,4-VA two triazole unit itself on the properties of the materials. In this chapter we rearrange the molecular units and then synthesized two asymmetric main material new, subtle changes in the structure of the device efficiency was To improve the.3. electronic transmission type rotary 1,2,4- two were well coated phosphorescent host material based on although the vacuum evaporation deposition of OLEDs devices are commonly used and very mature methods, but it has some problems, such as low material utilization ratio, measurement of evaporation in the process of inaccuracy, the cost of the device high, high vacuum and complicated operation. The introduction of OLEDs prepared by spin coating device is a good solution to the problem, but the spin devices of material requirements higher. In addition to the traditional evaporation device material requirements, the solubility of spin coating material, film forming material and solution the glass transition temperature have higher requirements. Although the application of PVK OXD-7 system collocation in the spin coating device is very extensive, but the OXD-7 three line state is only 2.69 eV, can not be used in blue light PHOLEDs, so in the second part of the work We use 1,2,4- two um azole substituted 1,3,4. well two were way to get the electronic transmission type main material two three linewise higher, we will transfer type rotary screw hole three fluorene aniline coated phosphorescent host material based on Application of several materials in the blue light PHOLEDs in.4.: in the previous chapter, we based on the retention of PVK, a new synthesized 3 kinds of electronic type main material, but the efficiency of the device from these materials is not high, especially the starting voltage of the device is relatively high. We think it is because of the start voltage causes the high polymer as the main body, so the work in this chapter we synthesized a series of small molecule hole transporting material. The spin coated PHOLEDs devices by blue collocation electronic transmission type OXD-7 materials, compared with polymer PVK device as the main body, the efficiency has been significantly improved.

【學位授予單位】：蘇州大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ25;TN383.1

【共引文獻】

相關(guān)期刊論文 前1條

1 王芳芳;陶友田;黃維;;高效藍光有機電致磷光主體材料的研究進展[J];化學學報;2015年01期

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本文編號：1406670