本文選題：盤(pán)狀分子 + 盤(pán)狀液晶��； 參考：《北京交通大學(xué)》2017年博士論文

【摘要】：大環(huán)盤(pán)狀液晶分子材料多由較大的芳香中心核組成,并具有一定的自組裝和分子取向傾向,獲得分子取向的盤(pán)狀液晶材料,往往具有優(yōu)異的光電物理特性,其高度各向異性的結(jié)構(gòu)可使其在一定方向上的性能得以?xún)?yōu)化,從而獲得高的載流子遷移率、長(zhǎng)的激子擴(kuò)散長(zhǎng)度。尤其是其結(jié)構(gòu)缺陷的自我修復(fù)能力,可使得其優(yōu)異的性能保持高度的穩(wěn)定性,令人矚目。因而被認(rèn)為是極具潛力的、新一代的有機(jī)光電子材料。本論文圍繞一系列新型盤(pán)狀液晶有機(jī)材料在光電子器件中的應(yīng)用,特別是太陽(yáng)能電池領(lǐng)域的應(yīng)用,展開(kāi)了一系列的基礎(chǔ)研究,具體研究?jī)?nèi)容包括如下幾個(gè)方面:1.本論文首先研究了如何采用盤(pán)狀液晶材料,制備具有垂面(homeotropic or face-on)分子取向的薄膜。鑒于常規(guī)盤(pán)狀液晶垂面分子取向結(jié)構(gòu)的獲得均采用將盤(pán)狀液晶材料灌注入標(biāo)準(zhǔn)液晶盒的方式,但是此方法顯然不適用于逐層構(gòu)造的光電子器件的制作。本論文將探索在單一基片表面制備可應(yīng)用的大面積分子垂面取向的方法。雖然在液晶盒中獲得垂面分子取向的報(bào)道很多,迄今為止,能在單一基片表面上獲得 面積垂面分子取向的材料卻寥寥無(wú)幾,這為其在光電子器件中的應(yīng)用帶了巨大的挑戰(zhàn)。本論文結(jié)合偏光顯微鏡和X射線衍射實(shí)驗(yàn)技術(shù),研究了一系列盤(pán)狀液晶材料的分子取向。重點(diǎn)研究了具有電雙極性的盤(pán)狀液晶苯并菲SK-75和電子傳輸性能的蒽醌類(lèi)盤(pán)狀液晶AQ6兩種新材料的分子取向特性。本研究第一次嘗試通過(guò)溫度調(diào)控的方法,實(shí)現(xiàn)了 SK-75和AQ6在單一襯底表面上的大面積、穩(wěn)定、均勻、六方對(duì)稱(chēng)高度有序的垂面分子取向,并測(cè)得其結(jié)構(gòu)參數(shù)。對(duì)比H4TP、H5TP、TPT-BAE較為熟悉的盤(pán)狀液晶材料的分子取向發(fā)現(xiàn),分子結(jié)構(gòu),尤其是柔性側(cè)鏈的結(jié)構(gòu)是影響苯并菲類(lèi)盤(pán)狀液晶材料取向的關(guān)鍵因素,同時(shí)還需選擇適當(dāng)?shù)臏乜貤l件,才能獲得較好的分子取向。本研究還在上述溫度調(diào)控垂面分子取向的基礎(chǔ)上上,進(jìn)一步引入摻雜誘導(dǎo)輔助的方法研究取向效果。實(shí)現(xiàn)了給受體復(fù)合體系oo-CuPc:AQ6以及同質(zhì)復(fù)合體系H4TP:SK-75的誘導(dǎo)分子取向調(diào)控。2.以苯并菲TPT-BAE和蒽醌AQ6盤(pán)狀液晶材料為代表,研究了分子取向?qū)馕锢硖匦约拜d流子遷移率的影響。木論文創(chuàng)新性的采用與實(shí)際有機(jī)光電子器件制備方法一致的逐層生長(zhǎng)法,通過(guò)溫度調(diào)控在襯底表面上實(shí)現(xiàn)了苯并菲TPT-BAE及蒽醌AQ6盤(pán)狀分子垂面取向,構(gòu)建了接近實(shí)際應(yīng)用的器件結(jié)構(gòu),并分別對(duì)兩種分子取向薄膜的光電性能展開(kāi)了研究,最后展開(kāi)了初步光伏器件制備的嘗試。研究發(fā)現(xiàn),短波長(zhǎng)的吸收光譜與盤(pán)狀分子的取向密切相關(guān)。分子垂面取向后,TPT-BAE及蒽醌AQ6在短波段的紫外吸收顯著增強(qiáng);TPT-BAE薄膜材料呈雙極性載流子(空穴和電子)遷移,垂面取向使得薄膜的空穴和電子遷移率均獲得近三個(gè)數(shù)量級(jí)的提高,分別達(dá)到6.25×10-2和4.28×10-2cm2V-1s-1,接近目前已知的苯并菲類(lèi)盤(pán)狀液晶雙極性載流子遷移率的最大值。這是首次嘗試采用飛行時(shí)間法研究在單一襯底上垂面取向生長(zhǎng)的盤(pán)狀液晶的載流子傳輸特性。率先報(bào)道了具有分子取向的新型蒽醌類(lèi)盤(pán)狀液晶材料的電子傳輸特性。采用逐層生長(zhǎng)法,構(gòu)建了基于蒽醌AQ6在單一襯底上生長(zhǎng)的垂面分子取向薄膜,研究發(fā)現(xiàn),分子取向的蒽醌AQ6薄膜在紫外短波段光吸收顯著增強(qiáng),有效地提高了吸收截面;通過(guò)構(gòu)造唯電子器件,并用空間電荷限制電流(SCLC)方法研究薄膜的載流子遷移率,分子取向后的電子遷移率可提高兩個(gè)數(shù)量級(jí),達(dá)到1.2×10-2 cm2V-1-s-1。采用在單一基片上生長(zhǎng)的垂面取向結(jié)構(gòu)研究電子傳輸盤(pán)狀液晶的載流子傳輸特性,在國(guó)際上尚屬首例。3.采用n型蒽醌AQ6盤(pán)狀液晶為受體材料,研究了其與給體聚合物制備本體異質(zhì)結(jié)太陽(yáng)能電池的可行性。研究首次嘗試將蒽醌AQ6分別與p型給體材料MEH-PPV、P3HT共混,制備了相應(yīng)的本體異質(zhì)結(jié)太陽(yáng)能電池器件,探索將AQ6作為受體材料應(yīng)用于聚合物太陽(yáng)能電池的可行性。研究發(fā)現(xiàn),AQ6與MEH-PPV之間由于存在分子間相互作用,不能有效地產(chǎn)生光伏響應(yīng),推測(cè)發(fā)生了分子間電荷轉(zhuǎn)移,使得該組合不能成為有效的給受體組合;而AQ6與P3HT之間的相互作用較小,該組合可以產(chǎn)生光伏輸出,這說(shuō)明蒽醌類(lèi)盤(pán)狀液晶材料可以作為受體應(yīng)用于有機(jī)聚合物本體異質(zhì)結(jié)太陽(yáng)能電池器件中。4.以盤(pán)狀大分子金屬酞菁作為有機(jī)層與非晶硅雜化的結(jié)構(gòu)非晶硅與有機(jī)材料的復(fù)合或雜化結(jié)構(gòu)的研究極其稀少,本論文第一次創(chuàng)新性地采用非晶硅與盤(pán)狀大分子金屬酞菁的簡(jiǎn)單復(fù)合結(jié)構(gòu),并制備了太陽(yáng)能電池,研究該結(jié)構(gòu)的光伏響應(yīng)特性。研究發(fā)現(xiàn),非晶硅/金屬酞菁可以獲得光伏輸出,器件的光伏性能與金屬酞菁層的厚度密切相關(guān);光電流的貢獻(xiàn)主要來(lái)自于非晶硅層。分析表明,金屬酞菁層與非晶硅層之間不平衡的載流子傳輸能力限制了載流子的傳輸和收集效率,這為以后雜化器件的結(jié)構(gòu)和性能優(yōu)化提供了新的方向。全文共圖53幅,表8個(gè),參考文獻(xiàn)277篇。
[Abstract]:The macrocyclic liquid crystal molecular material is composed of large aromatic core nuclei, and has a certain tendency of self-assembly and molecular orientation. The molecular oriented disk liquid crystal materials often have excellent photoelectric physical properties. The highly anisotropic structure can optimize the performance of a certain square up and thus obtain high load current. The migration rate, the long exciton diffusion length, especially the self repair ability of its structural defects can make its excellent performance maintain high stability and attract people's attention. Therefore, it is considered as a potential new generation of organic optoelectronic materials. This paper focuses on a series of new discoid liquid crystal organic materials in optoelectronic devices. A series of basic studies have been carried out, especially in the field of solar cells. The specific research contents include the following aspects: 1. this paper first studied how to use disk like liquid crystal materials to prepare thin films with homeotropic or face-on molecular orientation. This method is obviously not suitable for the fabrication of optoelectronic devices with layer by layer structure. This paper will explore the method for the preparation of large area molecular vertical orientation on the surface of a single substrate. Although there are many reports on the orientation of the vertical surface in the liquid crystal box, we have so far So far, few materials can be obtained on the surface of a single substrate. This is a great challenge for its application in optoelectronic devices. In this paper, the molecular orientation of a series of disk like liquid crystal materials is studied by polarizing microscope and X ray diffraction technique. The molecular orientation properties of two new materials, discoid benzo phenanthrene SK-75 and electron transport properties of anthraquinone discoid liquid crystal AQ6. The first attempt to achieve a large area, stable, uniform, six square symmetrical and highly ordered vertical surface molecular orientation on the surface of a single substrate by the method of temperature regulation, and the structure of SK-75 and AQ6 The molecular orientation of the H4TP, H5TP, and TPT-BAE discoid liquid crystals is found to be the key factor affecting the orientation of the phenanthrene discoid liquid crystal material, especially the structure of the flexible side chain, and a suitable temperature control condition is needed to obtain better molecular orientation. On the basis of surface molecular orientation, the effect of orientation was further introduced by doping inducement. The induced molecular orientation of oo-CuPc:AQ6 and H4TP:SK-75 in the homogenous complex system was controlled by.2., which was substituted by phenanthrene TPT-BAE and anthraquinone AQ6 discoid liquid crystal. The influence of carrier mobility. The paper innovatively adopts the layer by layer growth method consistent with the actual organic optoelectronic device preparation method. Through the temperature regulation, the vertical surface orientation of phenanthrene TPT-BAE and anthraquinone AQ6 disk molecules is realized on the substrate surface, and the device structure close to the actual application is constructed, and two kinds of molecular oriented films are made respectively. It is found that the short wavelength absorption spectrum is closely related to the orientation of the disc molecules. After the vertical plane orientation, the UV absorption of TPT-BAE and anthraquinone AQ6 increases significantly in the short band, and the TPT-BAE thin film materials migrate in the bipolar carrier (hole and electron). The vertical plane orientation makes the cavitation and electron mobility of the thin films increase nearly three orders of magnitude, reaching 6.25 * 10-2 and 4.28 x 10-2cm2V-1s-1 respectively. It is close to the maximum value of the known phenanthrene discoid liquid crystal bipolar carrier mobility. This is the first attempt to study the vertical surface orientation growth on a single substrate by the flight time interval method. The carrier transmission characteristics of the disk like liquid crystal have been reported. The electron transport characteristics of the novel anthraquinone discoid liquid crystal materials with molecular orientation are reported. A layer by layer growth method is used to construct the pendant surface molecular oriented film based on the anthraquinone AQ6 on a single substrate. The study shows that the molecular oriented anthraquinone AQ6 thin film is absorbed in the UV short band light absorption. The absorption cross section is significantly enhanced and the carrier mobility of the film is studied by constructing a electronic only device and using the space charge limited current (SCLC) method. The electron mobility of the molecule can be increased by two orders of magnitude, and the vertical structure of a 1.2 x 10-2 cm2V-1-s-1. which is grown on a single substrate is used to study the electron transfer. The carrier transmission characteristics of disk like liquid crystals are the first example of.3. using N type anthraquinone AQ6 disk liquid crystal as the receptor material. The feasibility of preparing bulk heterojunction solar cells with donor polymers was studied. The first attempt was to blend the anthraquinone AQ6 with the P donor MEH-PPV and P3HT, and the corresponding bulk heterostructure was prepared. A solar cell device is used to explore the feasibility of applying AQ6 as a receptor material to polymer solar cells. It is found that the interaction between AQ6 and MEH-PPV can not produce the photovoltaic response effectively because of the intermolecular interaction. It is presumed that the charge transfer between molecules has occurred, making the combination not an effective donor combination; and AQ6 The interaction between P3HT is smaller and the combination can produce photovoltaic output, which shows that the anthraquinone discoid liquid crystal material can be used as a receptor in the organic polymer bulk heterojunction solar cell devices, and.4. is used as the composite or heterozygous of amorphous silicon and organic materials. The study of chemical structure is very rare. In this paper, the simple composite structure of amorphous silicon and disk macromolecular metal phthalocyanine was first used in this paper. The solar cell was prepared and the photovoltaic response characteristics of the structure were studied. It was found that the photovoltaic output of the amorphous silicon / metal phthalocyanine can be obtained. The photovoltaic performance of the device and the thickness of the metal phthalocyanine layer are also found. The contribution of the optical current mainly comes from the amorphous silicon layer. The analysis shows that the unbalanced carrier transport capacity between the metal phthalocyanine layer and the amorphous silicon layer restricts the transport and collection efficiency of the carrier, which provides a new direction for the structure and performance optimization of the hybrid devices. The full text is 53, 8, and 277 references. Article.

【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：O753.2

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 唐久進(jìn);郭人民;李建;安忠維;;對(duì)稱(chēng)型苯并菲盤(pán)狀液晶研究進(jìn)展[J];化工新型材料;2006年09期

2 趙可清;余文浩;汪必琴;胡平;;氫鍵穩(wěn)定的含酰胺基的盤(pán)狀液晶研究進(jìn)展[J];四川師范大學(xué)學(xué)報(bào)(自然科學(xué)版);2009年01期

3 王學(xué)智;王秀峰;;盤(pán)狀液晶的性能及應(yīng)用[J];材料導(dǎo)報(bào);2009年23期

4 陳樹(shù)森;李田;趙達(dá)慧;;盤(pán)狀液晶材料的研究進(jìn)展[J];物理化學(xué)學(xué)報(bào);2010年04期

5 謝恩麗;盤(pán)狀液晶研究新進(jìn)展[J];江西化工;1997年02期

6 王濤,周恩樂(lè);盤(pán)狀液晶材料(2)準(zhǔn)一維物理性能的研究[J];高分子通報(bào);1999年01期

7 鄭效盼,何志群,張春秀,王永生;盤(pán)狀液晶材料及電導(dǎo)性能研究的最新進(jìn)展[J];功能材料;2005年03期

8 趙可清;楊高帆;余文浩;汪必琴;胡平;;盤(pán)狀液晶中間體單羥基苯并菲簡(jiǎn)便合成[J];有機(jī)化學(xué);2009年12期

9 王濤,周恩樂(lè);盤(pán)狀液晶材料(1)聚集態(tài)結(jié)構(gòu)及分子工程[J];高分子通報(bào);1998年04期

10 趙可清;周慧;余文浩;汪必琴;胡平;;鈀催化偶聯(lián)反應(yīng)合成剛性橋連的苯并菲盤(pán)狀液晶二聚體[J];化學(xué)學(xué)報(bào);2011年16期

相關(guān)會(huì)議論文 前10條

1 趙t，

本文編號(hào)：1879572