摘要
通过有机溶剂N,N-二甲基甲酰胺(DMF)处理P3HT:PCBM聚合物太阳能电池的PEDOT:PSS阳极缓冲层,能量转换效率得到了很大程度提高.DMF处理PEDOT:PSS阳极缓冲层主要有以下两种方式:①DMF 1∶4(v/v)混合原始的PEDOT:PSS溶液;②直接旋涂DMF在PEDOT:PSS阳极缓冲层上.其中后者的效果最为显著,器件结构为ITO/PEDOT:PSS/P3HT:PCBM/Al的电池通过直接旋涂DMF(3 000rpm)处理PEDOT:PSS阳极缓冲层后,电池效率由3.16%提高到4.27%,提高幅度为35%.为了探究电池能量转换效率提高的机理,我们测试表征了电池在光照和暗态下的I-V特性曲线及外量子效率(IPCE)光谱,PEDOT:PSS薄膜的透光性、导电性及表面形貌,光活性层P3HT:PCBM的紫外可见光吸收及表面形貌.一系列结果表明PEDOT:PSS薄膜的导电性增强及表面形貌变化有利于空穴的抽取和收集,P3HT:PCBM薄膜的表面形貌变化有利于活性层光吸收的增强和电子的收集.
N, N-dimethyl ethylenedioxythio-phene） .. hexylthiophene） （P3HT）： formamide （DMF）, an organic solvent, was used to treat poly （styrene sulfonate） （PEDOT= PSS） anode buffer layer, [6, 6-]-phenyl C01-butyric acid methyl ester （PCBM） polymer poly （ 3, 4- in poly （3- solar cells,resulting in significant enhancement of power conversion efficiency （PCE）. There are mainly two ways for treating PEDOT..PSS anode buffer layer, mixing the original PEDOT.PSS solution 4 ： 1 （v/v） with DMF solvent, and, directly spin-coating DMF solvent on PEDOT. PSS anode buffer layer fabricated using the original solution. Power conversion efficiency of the latter was enhanced significantly, and the PCE of the ITO/PEDOT：PSS/P3HT： PCBM/A1 polymer solar cell device by using DMF-treated （3 000 rpm） PEDOT.PSS increased by 35~ （from 3.16~ to 4. 27%）. In order to explore the mechanism of PCE enhancement of polymer solar cells. The I-V curve of a solar cell under illumination and in the dark, and the incident photon-to-current collection efficiency （IPCE） spectra; transmittance, conductivity and surface morphology of PEDOT： PSS buffer layer; UV-visible absorption and surface morphology of P3HT.. PCBM active layer were studied. The results show that conductivity improvement and surface morphology changes of PEDOT：PSS buffer layer improve hole extraction and collection. Surface morphology changes of P3HT. PCBM layer improve optical absorption enhancement of the active layer and the electron collection.
基金
国家自然科学基金(21132007)
中国科学院"百人计划"
教育部高等学校博士学科点专项科研基金课题(20113402110020)
中央高校基本科研业务费专项资金(WK2060140005)资助
