Room to Improve Conjugated Polymer-Based Solar Cells: Understanding How Thermal Annealing Affects the Fullerene Component of a Bulk Heterojunction Photovoltaic Device
Room to Improve Conjugated Polymer-Based Solar Cells: Understanding How Thermal Annealing Affects the Fullerene Component of a Bulk Heterojunction Photovoltaic Device
复制标题
DOI：
10.1021/jp8076497
复制
发表时间：
2008-11
影响因子：
3.7
通讯作者：
Alexander L. Ayzner;Darcy D. Wanger;Christopher J. Tassone;S. Tolbert;B. Schwartz
中科院分区：
文献类型：
--
作者：
Alexander L. Ayzner;Darcy D. Wanger;Christopher J. Tassone;S. Tolbert;B. Schwartz
我们研究了热退火如何影响共轭聚合物体异质结（BHJ）太阳能电池中的富勒烯网络。我们开始通过将富勒烯衍生物[6，6]-苯基-C61-丁酸甲酯（PCBM）与聚苯乙烯（PS）共混来创建具有BHJ几何结构的仅电子器件。这些仅电子的PS：PCBM二极管甚至与聚（亚乙基二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT：PSS）层一起起作用，表明PEDOT：PSS膜不充当电子阻挡层。原子力显微镜显示，在PS：PCBM共混物膜的相分离的程度是类似的，在活性层的共混物的PCBM与聚（3-己基噻吩-2，5-二基）（P3 HT），使PS：PCBM共混物提供了一个很好的模型的BHJ网络的富勒烯部分P3 HT：PCBM太阳能电池。我们发现，热退火显着降低了电子电流的PS：PCBM二极管中流动，这表明退火导致增加相分离，降低了电子迁移率的F…
We examine how thermal annealing affects the fullerene network in conjugated polymer bulk heterojunction (BHJ) solar cells. We begin by creating electron-only devices with a BHJ geometry by blending the fullerene derivative [6,6]-phenyl-C61-butyric-acid-methyl-ester (PCBM) with polystyrene (PS). These electron-only PS:PCBM diodes function even with a poly(ethylenedioxithiophene):poly(styrenesulfonate) (PEDOT:PSS) layer, indicating that PEDOT:PSS films do not serve as electron blocking layers. Atomic force microscopy shows that the degree of phase segregation in the PS:PCBM blend films is similar to that in the active layer of blends of PCBM with poly(3-hexylthiophene-2,5-diyl) (P3HT), so that the PS:PCBM blends provide a good model for the fullerene part of the BHJ network in P3HT:PCBM solar cells. We find that thermal annealing dramatically decreases the electron current that flows in the PS:PCBM diodes, suggesting that annealing leads to increased phase segregation that lowers the electron mobility on f...