【摘要】：近年來(lái),有機(jī)光電子器件憑借其低成本、可大面積制備、材料選擇范圍廣以及可實(shí)現(xiàn)柔性折疊等優(yōu)點(diǎn)引起了人們的廣泛關(guān)注。其中,為了實(shí)現(xiàn)柔性折疊,找到理想的柔性透明電極是一個(gè)亟需解決的問(wèn)題。導(dǎo)電聚合物材料聚(3,4-乙撐二氧噻吩):聚苯乙烯磺酸鹽(PEDOT:PSS)柔韌性好、透過(guò)率高、易加工,是非常具有應(yīng)用潛力的理想柔性透明電極。目前,PEDOT:PSS還存在著溶液穩(wěn)定性差、制成薄膜導(dǎo)電率有待提高、材料能級(jí)與寬帶隙空穴傳輸材料不匹配、缺乏在陰極處的應(yīng)用等問(wèn)題。本論文主要以有機(jī)電致發(fā)光器件(OLED)和有機(jī)太陽(yáng)能電池(OPV)為研究對(duì)象,系統(tǒng)地優(yōu)化了制備工藝,考察基板預(yù)處理及薄膜退火條件對(duì)PEDOT:PSS成膜性和光電性能的影響;在失效溶液中添加高沸點(diǎn)極性有機(jī)溶劑改善并修復(fù)PEDOT:PSS的光電性能;研究在電極界面運(yùn)用功能薄層調(diào)節(jié)薄膜功函數(shù)的可行性且對(duì)PEDOT:PSS薄膜結(jié)構(gòu)和光電性能的影響。研究結(jié)論如下:1.PEDOT:PSS薄膜制備工藝的優(yōu)化工作。首先系統(tǒng)地優(yōu)化了ITO表面氧等離子體處理的條件,改善ITO的表面性能使PEDOT:PSS溶液能在ITO表面形成均勻薄膜;其次優(yōu)化了PEDOT:PSS薄膜的退火參數(shù),結(jié)果表明PEDOT:PSS薄膜的性能與退火條件密切相關(guān),在合適的退火溫度和時(shí)間下,顆粒之間的連接性好,導(dǎo)電率增加,提高器件性能。2.失效PEDOT:PSS溶液的修復(fù)研究。PEDOT:PSS溶液存放在空氣中,其性能隨時(shí)間呈衰減趨勢(shì)。本論文對(duì)已失效的PEDOT:PSS溶液添加乙二醇、丙三醇后,PEDOT:PSS溶液性能恢復(fù),對(duì)應(yīng)有機(jī)發(fā)光器件的電學(xué)性能甚至優(yōu)于未暴露于空氣環(huán)境的PEDOT:PSS薄膜。3.在PEDOT:PSS表面運(yùn)用功能層調(diào)節(jié)功函數(shù)的研究。在ITO/PEDOT:PSS表面引入Mo O3功能薄層后,器件性能反而隨著Mo O3厚度增大而快速衰減,空穴注入能力明顯減弱;在ITO/PEDOT:PSS表面引入Cs2CO3功能薄層后,該結(jié)構(gòu)呈現(xiàn)明顯陰極特性,可作為太陽(yáng)能電池器件的電子收集極。在PEDOT:PSS表面加入Cs2CO3修飾層后,有機(jī)太陽(yáng)能電池呈現(xiàn)光伏特性,開(kāi)路電壓由0V增加到0.44V,短路電流密度為10.84 m A/cm2,能量轉(zhuǎn)換效率為1.85%,成功實(shí)現(xiàn)了PEDOT:PSS作為陰極和電子收集極的運(yùn)用。
[Abstract]:In recent years, organic optoelectronic devices have attracted wide attention due to their advantages of low cost, large area fabrication, wide selection of materials and flexible folding. In order to achieve flexible folding, it is an urgent problem to find an ideal flexible transparent electrode. Conductive polymer poly (3o 4- ethylenedioxythiophene): polystyrene sulfonate (PEDOT:PSS) is an ideal flexible transparent electrode with good flexibility, high transmittance and easy processing. At present, the solution stability of PEDOT: PSS is poor, the conductivity of the thin film needs to be improved, the material energy level is not matched with the wide gap hole transport material, and the application in cathode is lacking. In this thesis, the preparation process of organic electroluminescent device (OLED) and organic solar cell (OPV) were studied systematically, and the effects of substrate pretreatment and annealing conditions on the film forming and photoelectric properties of PEDOT:PSS were investigated. The optoelectronic properties of PEDOT:PSS were improved and repaired by adding high boiling point polar organic solvent to the failure solution. The feasibility of adjusting the work function of PEDOT:PSS thin film by functional thin layer at the electrode interface and its influence on the structure and photoelectric properties of PEDOT:PSS film were studied. The results are as follows: 1. Optimizing the preparation process of PEDOT: PSS thin films. Firstly, the conditions of oxygen plasma treatment on ITO surface are systematically optimized to improve the surface properties of ITO so that PEDOT:PSS solution can form uniform film on ITO surface. Secondly, the annealing parameters of PEDOT:PSS film are optimized. The results show that the properties of PEDOT:PSS films are closely related to the annealing conditions. At the appropriate annealing temperature and time, the interparticle connectivity is good, the conductivity is increased, and the device performance is improved by .2. Study on repair of failure PEDOT:PSS solution. PEDOT: PSS solution is stored in air and its performance tends to decrease with time. In this paper, ethylene glycol is added to the failed PEDOT:PSS solution, and the performance of PEDOT: PSS solution recovers after glycerol. The electrical properties of the corresponding organic luminescent devices are even better than those of the PEDOT:PSS film. 3. A study on the use of functional layer to adjust the work function on PEDOT:PSS surface. After the introduction of Mo O 3 functional thin layer on the surface of ITO/PEDOT:PSS, the performance of the device decreases rapidly with the increase of Mo O 3 thickness, and the hole injection ability decreases obviously, and when the Cs2CO3 functional thin layer is introduced on the surface of ITO/PEDOT:PSS, the structure exhibits obvious cathodic characteristics. It can be used as an electronic collector for solar cell devices. After the addition of Cs2CO3 modified layer on the surface of PEDOT:PSS, the organic solar cells exhibit photovoltaic characteristics. The open circuit voltage is increased from 0 V to 0.44 V, the short-circuit current density is 10.84 Ma / cm ~ 2, and the energy conversion efficiency is 1.85%. The application of PEDOT:PSS as cathode and electron collector has been successfully realized.
【學(xué)位授予單位】：深圳大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TM914.4;TN383.1

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本文編號(hào)：2205404