PEDOT:PSS掺杂对聚合物太阳电池性能影响的研究

发布时间：2019-06-18 23:06

【摘要】：聚合物太阳电池（Polymer Solar Cells, PSCs）是一种新型太阳电池，由于其拥有诸多优点，目前已经成为太阳电池领域被研究的一大热点。然而PSCs现今仍面临许多问题，比如器件的能量转换效率(Power Conversion Efficiency,PCE)较低且稳定性较差等，还不能如传统的无机太阳电池一样实现商业化。导电聚合物聚(3,4-乙撑二氧噻吩)：聚苯乙烯磺酸盐(PEDOT:PSS)因为透过率高、在空气中稳定和应用方便等优点，已经被广泛应用到有机太阳电池等领域中。利用掺杂剂对PEDOT:PSS薄膜进行优化，是提高PSCs性能的重要方法之一。本文主要围绕掺杂剂处理过的PEDOT:PSS薄膜的优化效果及该薄膜作为阳极修饰层制备的PSCs展开相关研究工作。本论文研究的主要目的是通过掺杂剂优化PEDOT:PSS薄膜进而提高PSCs的PCE等，主要工作分为两个内容，即不同体积分数的二甲基亚砜(DMSO)、甘油和乙腈分别对PEDOT:PSS薄膜进行掺杂优化研究、及它们作为PSCs的阳极修饰层的研究。其中，，乙腈作为掺杂剂对PEDOT:PSS进行掺杂处理以前没有报道过。本实验首先研究了DMSO、甘油和乙腈三种掺杂剂分别以不同体积分数加入PEDOT:PSS共混液中旋涂获得的薄膜的光学性能、导电性能、表面粗糙度等。为了获得DMSO、甘油和乙腈三种掺杂剂分别对PEDOT:PSS薄膜的优化机制，进而对用三种掺杂剂分别处理过的PEDOT:PSS溶液进行傅里叶红外光谱测试。然后，本文还对DMSO、甘油和乙腈三种掺杂剂分别以不同体积分数加入PEDOT:PSS共混液中旋涂获得的薄膜制备的PSCs进行了研究。本实验的PSCs的结构为ITO/PEDOT:PSS/聚3-己基噻吩(P3HT):[6,6]-phenyl-C61-butyric acid methyl ester (PCBM)/Ca/Al。文章中详细的介绍了PEDOT:PSS掺杂共混液的配置过程及电池的制备过程。 DMSO、甘油和乙腈分别处理过的PEDOT:PSS薄膜的透过率大都会有少许提高，此外，各个薄膜电导率明显得到很大的提高，特别是在掺杂体积分数为3%时提高最多。由三种掺杂剂处理过的PEDOT:PSS溶液的傅里叶红外光谱图可获得，DMSO或者乙腈的加入没有改变PEDOT:PSS的分子结构，即DMSO或乙腈的掺杂导致PEDOT:PSS薄膜电导率增加的机理与聚合物链的构象变化基本没有关系；添加甘油后，PEDOT:PSS的分子键会发生微小的变化，进而也会影响到PEDOT:PSS形成的导电网络。在研究掺杂DMSO的PEDOT:PSS薄膜的实验中，分别对掺杂0%、3%、5%、10%、15%、20%DMSO的PEDOT:PSS薄膜及其作为阳极修饰层制备的PSCs进行研究。研究结果发现，未掺杂的薄膜的电导率为0.28S/cm，相应器件的PCE为0.66%；掺杂3%DMSO时，PEDOT:PSS薄膜的电导率达到最大，为41.52S/cm，相应器件的PCE最高，为3.79%，此时短路电流密度(Jsc)达18.31mA/cm2，开路电压(Voc)达0.53V，填充因子(Fill Factor,FF)为39.1%。本文也对掺杂0%、3%、5%、10%、15%、20%甘油和乙腈的PEDOT:PSS薄膜及其作为阳极修饰层制备的PSCs分别进行了研究。实验数据表明，掺杂后PEDOT:PSS薄膜的电导率均是先增加后减小，掺杂3%时，电导率的增加非常明显。掺杂3%甘油的薄膜制备的器件PCE也是最大的，为2.70%。掺杂3%乙腈的PEDOT:PSS薄膜制备的器件PCE也是最大的，为1.27%。。对比以上三种掺杂剂分别对PEDOT:PSS的掺杂效果，发现三种掺杂剂均是在掺杂浓度为3%时，器件的能量转换效率达到最高，且掺杂3%DMSO的器件能量转换效率最高。
[Abstract]:Polymer Solar Cells (PSCs) is a new type of solar cell. Because of its many advantages, it has become a hot spot in the field of solar cells. However, PSCs are still facing a number of problems, such as the low energy conversion efficiency (PCE) of the device and poor stability, and can not be commercialized as traditional inorganic solar cells. Conductive polymer poly (3,4-dioxydioxolane): polystyrene sulfonate (PEDOT: PSS) has been widely used in the field of organic solar cells because of its high transmittance, stable and convenient application in air, etc. It is an important method to improve the performance of PSCs by using the dopant to optimize the PEDOT: PSS film. I. The optimization effect of the PEDOT: PSS film treated with the dopant and the PSCs prepared by the thin film as the anode modification layer are studied. The main purpose of this paper is to optimize the PEDOT: PSS thin film by the dopant so as to improve the PCE of the PSCs, etc. The main work is divided into two contents, i.e., the different volume fraction of the dimethylaniline (DMSO), the glycerol and the acetonitrile are respectively doped with the PEDOT: PSS film. Chemical studies and their anode-modified layers as PSCs in which acetonitrile is not used as a dopant for the doping treatment of the pedot: pss before the doping treatment of the pedot: pss, The optical properties, the conductivity and the properties of the film obtained by spin-coating of the three kinds of dopants of DMSO, glycerol and acetonitrile were studied in different volume fractions, respectively. In order to obtain the optimum mechanism of the three kinds of dopants of DMSO, glycerol and acetonitrile to PEDOT: PSS film, the PEDOT: PSS solution treated with three kinds of dopants is then subjected to Fourier transform. And then adding the three kinds of dopants of DMSO, glycerol and acetonitrile into the PSCs prepared by spin-coating of the PEDOT: PSS co-mixed solution with different volume fractions, respectively. The structure of the PSCs of this experiment is ITO/ PEDOT: PSS/ poly 3-hexyl phthalate (P3HT):[6,6]-phenyl-C61-butyric acid methyl ester (PCBM)/ The configuration process and the battery of PEDOT: PSS-doped co-mixed solution are described in detail in the paper. The preparation process of the PEDOT: PSS thin film treated by DMSO, glycerol and acetonitrile is slightly improved, and the conductivity of each film is obviously improved, especially when the doping volume fraction is Up to 3% increase. The FTIR spectrum of the PEDOT: PSS solution treated with the three dopants can be obtained. The addition of DMSO or acetonitrile does not change the molecular structure of the PEDOT: PSS, that is, the doping of DMSO or acetonitrile results in the increase of the conductivity of the PEDOT: PSS film and the conformation of the polymer chain. There is essentially no relationship; after the addition of glycerol, the molecular bond of PEDOT: PSS will change slightly and will also affect PEDOT: PSS A PEDOT: PSS thin film doped with 0%,3%,5%,10%,15%,20% DMSO, and its preparation as an anode modification layer were prepared in the experiments on the study of the PEDOT: PSS thin film doped with DMSO. The results show that the conductivity of the undoped thin film is 0.28 S/ cm, the PCE of the corresponding device is 0.66%, when the 3% DMSO is doped, the conductivity of the PEDOT: PSS film reaches the maximum of 41.52 S/ cm and the PCE of the corresponding device is 3.79%. At this time, the short-circuit current density (Jsc) reaches 18.31 mA/ cm2, and the open circuit voltage (V c) up to 0.53 v, fill factor (fill factor, A PEDOT: PSS film doped with 0%,3%,5%,10%,15%,20% glycerol and acetonitrile was also used in this paper as an anode modified layer. The results of the experiment show that the conductivity of the PEDOT: PSS film after doping is reduced and the doping is 3%. and the increase of the conductivity is very obvious. the device pce prepared by the thin film doped with 3% glycerol also is the largest, 2.70%. The device pce prepared by the pedot: pss film doped with 3% acetonitrile is also The doping effect of the above three dopants on the PEDOT: PSS is the highest, and the energy conversion efficiency of the device reaches the highest when the doping concentration is 3%, and the doping is 3% DM.
【学位授予单位】：江南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM914.4

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