【摘要】：有機(jī)場(chǎng)效應(yīng)晶體管以其價(jià)廉、質(zhì)輕、可大規(guī)模加工應(yīng)用等優(yōu)點(diǎn)引起了人們的廣泛關(guān)注。相較于研究較多的無(wú)定型或多晶薄膜,有機(jī)單晶由于其較高的有序性以及較低的缺陷密度等優(yōu)點(diǎn),更有利于研究半導(dǎo)體中電荷的本征傳輸性能。在近幾年的研究中,人們發(fā)現(xiàn),絕緣層材料的選擇對(duì)晶體管的性能也起著至關(guān)重要的作用。而在絕緣層的研究中,主要針對(duì)其對(duì)p型器件的影響為主,而對(duì)于電子傳輸性能方面的影響研究較少。近期,我們發(fā)現(xiàn)使用非極性溶劑在 BCB(divinyl-tetramethyldisiloxane-bis(benzocyclobutene))上生長(zhǎng) TIPS-pentacene(6,13-bis(triisopropyl-silylethynyl)pentacene)這一典型的 p 型有機(jī)半導(dǎo)體,并使用金作為源漏電極時(shí),TIPS-pentacene在顯示較高空穴傳輸性能的同時(shí),還顯現(xiàn)出明顯的電子傳輸性能。這一電子性質(zhì)是之前沒(méi)有發(fā)現(xiàn)過(guò)的,原因很可能是晶體中的極性溶劑分子殘留阻礙了電子的傳輸。對(duì)此,論文以TIPS-pentacene為研究對(duì)象,進(jìn)一步展開(kāi)對(duì)其電子傳輸性質(zhì)的研究,探索了絕緣層以及極性溶劑殘留對(duì)TIPS-pentacene單晶電子遷移性能的影響。論文第一章概述了有機(jī)單晶的制備方法、有機(jī)場(chǎng)效應(yīng)晶體管的構(gòu)筑方法和應(yīng)用、聚合物絕緣層影響器件的因素。論文第二章具體研究了絕緣層以及極性溶劑殘留這兩種可極化環(huán)境對(duì)TIPS-pentacene單晶電子遷移性能的影響。并在聚苯乙烯、聚甲基丙烯酸甲酯、聚甲基丙烯酸甲酯和聚(偏氟乙烯-三氟乙烯-氯氟乙烯)三嵌段共聚物雙層絕緣層以及聚乙烯醇這4種絕緣層上獲得了 TIPS-pentacene單晶的電子遷移性能。并在聚甲基丙烯酸甲酯絕緣層上,獲得了 TIPS-pentacene 最高 0.48 cm2V-1s1 的電子遷移率。通過(guò)對(duì)比發(fā)現(xiàn),隨著絕緣層介電常數(shù)的增加,電子遷移率隨之降低。隨后我們又研究了極性溶劑殘留對(duì)TIPS-pentacene單晶電子遷移性能的影響,發(fā)現(xiàn)極性溶劑(包括氯仿、二氯甲烷、1,2-二氯乙烷以及四氫呋喃)的殘留會(huì)削弱電子傳輸性能。論文第三章具體研究了絕緣層表面經(jīng)基對(duì)TIPS-pentacene單晶電子遷移性能的影響。通過(guò)研究發(fā)現(xiàn),絕緣層表面的醇羥基由于具有較高的解離常數(shù)(解離常數(shù)pKa～15),較難解離氫離子,對(duì)電子的捕獲能力較弱,在其表面依然可以獲得TIPS-pentacene單晶較高的電子傳輸性能。同時(shí)我們也發(fā)現(xiàn)絕緣層表面的醇羥基密度對(duì)電子遷移性能的影響并不十分顯著。但對(duì)于絕緣層表面的酚羥基而言,由于其相對(duì)容易解離出氫離子而捕獲電子,因此在其表面,我們沒(méi)有獲得TIPS-pentacene單晶的電子傳輸性能。
[Abstract]:Due to its advantages of low price, light weight, large scale processing and so on, the field effect transistor has attracted much attention. Compared with amorphous or polycrystalline films, organic single crystals are more suitable for studying the intrinsic transport properties of charge in semiconductors due to their high order and low defect density. In recent years, it has been found that the selection of insulating material plays an important role in the performance of transistors. In the research of insulation layer, the influence of the insulator on the p-type device is mainly focused on, but the influence on the electronic transmission performance is less. Recently, we have found that when we use non-polar solvent to grow the TIPS-pentacene (6C13-bis (triisopropyl-silylethynyl) pentacene), a typical p-type organic semiconductor, and use gold as the source and leakage electrode, we find that the TIPS-pentacene (6C13 bis) is a typical organic semiconductor on BCB (divinyl-tetramethyldisiloxane-bis (benzocyclobutene), and gold is used as the source and leakage electrode. TIPS-pentacene not only shows high hole transport performance, but also shows obvious electron transport performance. This electron property has not been found before, probably because the polar solvent molecule residues in the crystal hinder the electron transport. In this paper, the electron transport properties of TIPS-pentacene were studied, and the effects of insulating layer and polar solvent residues on the electron transport properties of TIPS-pentacene single crystal were investigated. In the first chapter, the preparation methods of organic single crystals, the construction methods and applications of field effect transistors and the influence factors of polymer insulating layer on the devices are summarized. In chapter 2, the effects of the insulator and the polar solvent residue on the electron migration of TIPS-pentacene single crystal are studied in detail. And in polystyrene, polymethyl methacrylate, The electron migration properties of TIPS-pentacene single crystals were obtained on polymethyl methacrylate and poly (vinylidene fluoride trifluoroethylene chlorofluoroethylene) triblock copolymer double insulating layer and polyvinyl alcohol. The maximum electron mobility of TIPS-pentacene at 0.48 cm2V-1s1 was obtained on the polymethyl methacrylate insulator. It is found that the electron mobility decreases with the increase of dielectric constant. Then we studied the effect of polar solvent residues on the electron transport properties of TIPS-pentacene single crystals. It was found that the residues of polar solvents (including chloroform, dichloromethane, 1o 2-dichloroethane and tetrahydrofuran) would weaken the electron transport performance. In chapter 3, the effect of the surface of insulating layer on the electron migration of TIPS-pentacene single crystal is studied. It is found that the hydroxyl alcohol on the surface of the insulating layer is difficult to dissociate hydrogen ions because of its high dissociation constant (pKa~15). High electron transport properties of TIPS-pentacene single crystal can still be obtained on its surface. At the same time, we found that the influence of alcohol hydroxyl density on the electron transport performance was not significant. However, for the phenolic hydroxyl groups on the insulating surface, the electron transport properties of TIPS-pentacene single crystals are not obtained because of their relatively easy dissociation of hydrogen ions to capture electrons.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TN386

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 劉爽;吳嘉柯;范聰成;薛國(guó)標(biāo);陳紅征;Huolin L.Xin;李寒瑩;;面向場(chǎng)效應(yīng)晶體管大規(guī)模制備的有機(jī)單晶溶液生長(zhǎng)（英文）[J];Science Bulletin;2015年12期

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本文編號(hào)：2333983