Effects of soft insulating polymer doping on the photovoltaic properties of polymer-fullerene blend solar cells

Fu Chiao Wu, Shu Wei Hsu, Horng Long Cheng, Wei Yang Chou, Fu-Ching Tang

研究成果: Article同行評審

22 引文 斯高帕斯(Scopus)

摘要

The blending of organic semiconductor and insulating polymer as an active layer of organic transistors has been assessed by several studies and may open new possibilities for advantageous functions. However, studies on the use of insulating polymer doping in organic solar cells are rarely conducted. In this research, a blending film comprising regioregular poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) was doped with a soft insulating poly(methyl methacrylate) (PMMA) to act as an active layer of a solar cell. The fill factor (FF) and open-circuit voltage (VOC) of P3HT:PCBM solar cells were improved after PMMA doping. The microstructure- dependent photovoltaic properties of devices with different fractions of PMMA were investigated using spectroscopy and quantum chemical calculations. We highlight that PMMA doping leads to a more homogeneous conformation of P3HT chains, fewer vacancies, and fewer leakage pathways in blending films. Consequently, charges can be efficiently transported to the electrodes of devices, resulting in enhanced FF and VOC. The results of theoretical calculations at the microscopic molecular level also confirmed the enhanced electrical performance of devices from PMMA doping.

原文English
頁(從 - 到)8691-8696
頁數6
期刊Journal of Physical Chemistry C
117
發行號17
DOIs
出版狀態Published - 2013 五月 2

All Science Journal Classification (ASJC) codes

  • 物理與理論化學
  • 電子、光磁材料
  • 表面、塗料和薄膜
  • 能源(全部)

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