Performance improvement in poly(3-hexylthiophene):[6,6]-phenyl C61 butyric acid methyl ester polymer solar cell by doping wide-gap material tris(phenylpyrazole)iridium

Chiu Sheng Ho, Wei Chou Hsu, Ying Nan Lai, Ching Sung Lee, Wei Min Chen, E. Ling Huang, En Ping Yao, Ching Wu Wang

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Abstract

This letter demonstrates the high external quantum efficiency (EQE) of poly(3-hexylthiophene) (P3HT)-based polymer solar cells and their enhanced hole transport ability through doping a wide-band-gap material tris(phenylpyrazole) iridium [Ir(ppz)3]. Doping Ir(ppz)3 can enhance low wavelength optical absorption capacity and doping a small amount of Ir(ppz)3 can also improve the crystallinity of P3HT. Moreover, the large energy barrier between Ir(ppz)3 and the polymer active layer, which can reduce the electron current densities and increase the hole current densities, indicates a more balanced carrier transport based on hole- and electron-only devices. Such characteristics contribute to efforts to improve the photocurrent density of polymer solar cells.

Original languageEnglish
Article number042301
JournalApplied Physics Express
Volume6
Issue number4
DOIs
Publication statusPublished - 2013 Apr 1

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All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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