PEDOT：PSS透明电极在有机光电子器件中的应用研究
发布时间：2018-08-26 15:57
【摘要】：近年来,有机光电子器件凭借其低成本、可大面积制备、材料选择范围广以及可实现柔性折叠等优点引起了人们的广泛关注。其中,为了实现柔性折叠,找到理想的柔性透明电极是一个亟需解决的问题。导电聚合物材料聚(3,4-乙撑二氧噻吩):聚苯乙烯磺酸盐(PEDOT:PSS)柔韧性好、透过率高、易加工,是非常具有应用潜力的理想柔性透明电极。目前,PEDOT:PSS还存在着溶液稳定性差、制成薄膜导电率有待提高、材料能级与宽带隙空穴传输材料不匹配、缺乏在阴极处的应用等问题。本论文主要以有机电致发光器件(OLED)和有机太阳能电池(OPV)为研究对象,系统地优化了制备工艺,考察基板预处理及薄膜退火条件对PEDOT:PSS成膜性和光电性能的影响;在失效溶液中添加高沸点极性有机溶剂改善并修复PEDOT:PSS的光电性能;研究在电极界面运用功能薄层调节薄膜功函数的可行性且对PEDOT:PSS薄膜结构和光电性能的影响。研究结论如下:1.PEDOT:PSS薄膜制备工艺的优化工作。首先系统地优化了ITO表面氧等离子体处理的条件,改善ITO的表面性能使PEDOT:PSS溶液能在ITO表面形成均匀薄膜;其次优化了PEDOT:PSS薄膜的退火参数,结果表明PEDOT:PSS薄膜的性能与退火条件密切相关,在合适的退火温度和时间下,颗粒之间的连接性好,导电率增加,提高器件性能。2.失效PEDOT:PSS溶液的修复研究。PEDOT:PSS溶液存放在空气中,其性能随时间呈衰减趋势。本论文对已失效的PEDOT:PSS溶液添加乙二醇、丙三醇后,PEDOT:PSS溶液性能恢复,对应有机发光器件的电学性能甚至优于未暴露于空气环境的PEDOT:PSS薄膜。3.在PEDOT:PSS表面运用功能层调节功函数的研究。在ITO/PEDOT:PSS表面引入Mo O3功能薄层后,器件性能反而随着Mo O3厚度增大而快速衰减,空穴注入能力明显减弱;在ITO/PEDOT:PSS表面引入Cs2CO3功能薄层后,该结构呈现明显阴极特性,可作为太阳能电池器件的电子收集极。在PEDOT:PSS表面加入Cs2CO3修饰层后,有机太阳能电池呈现光伏特性,开路电压由0V增加到0.44V,短路电流密度为10.84 m A/cm2,能量转换效率为1.85%,成功实现了PEDOT:PSS作为阴极和电子收集极的运用。
[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.
【学位授予单位】：深圳大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM914.4;TN383.1
本文编号：2205404
[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.
【学位授予单位】：深圳大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM914.4;TN383.1
【参考文献】
相关期刊论文 前2条
1 钟志有;;射频等离子体改性工艺与氧化铟锡薄膜性能研究[J];真空科学与技术学报;2008年02期
2 段炼;张粲;张国辉;;柔性OLED制备及性能[J];中国科技论文在线;2010年04期
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