Direct comparison of charge transport and electronic traps in polymer-fullerene blends under dark and illuminated conditions

Yan Hui Lou, Lei Zhang, Mei Feng Xu, Zhao Kui Wang*, Shigeki Naka, Hiroyuki Okada, Liang Sheng Liao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

A direct comparison of charge transport and electronic traps in representative polymer-fullerene blend, poly (3-hexylthiophene) (P3HT) and 1-(3-methoxycarbonyl)-propyl-1-phenyl-(6,6)C61 (PCBM), is carried out in dark and illuminated conditions based on the measurements of temperature-dependent current-voltage characteristics. In dark condition, the charge transport presents a transition from Ohmic to trap-limited current. While the trap-filled space charge limited current is observed under illumination at the same applied bias. From evaluations of trap density and energy distribution by a differential method, it is reveal that the diverse charge transport in dark and illuminated conditions is mainly caused by the different trap states distribution, which strongly affects the space charges and the electrical field in P3HT: PCBM blends.

Original languageEnglish
Pages (from-to)299-305
Number of pages7
JournalOrganic Electronics
Volume15
Issue number1
DOIs
StatePublished - 2014/01

Keywords

  • Charge transport
  • Dark and illumination
  • Electrical traps
  • Polymer-fullerene

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • General Chemistry
  • Biomaterials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

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