Charge transport characteristics in P3HT:PCBM organic blends under illumination: Influence of metal work functions

Yanhui Lou, Zhaokui Wang*, Shigeki Naka, Hiroyuki Okada

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

The authors investigate the effects of metal work functions on charge transport characteristics in P3HT:PCBM bulk heterojunction under illumination by evaluating the temperature dependence of current-voltage characteristics. Schottky thermal emission current plays a dominant role on charge transport in the devices with Au or Al alloys used as electrodes. Whereas, a combined bulk limited conduction mechanism corresponding to three-dimensional variable-range hopping model and space charge limited current (SCLC) with an exponential distribution of traps (filled and unfilled) occurs in the device with Al used as electrode. And a shift to LUMO state of PCBM for trap density distribution is observed due to temperature dependence of Fermi level in PCBM material.

Original languageEnglish
Pages (from-to)64-68
Number of pages5
JournalChemical Physics Letters
Volume529
DOIs
StatePublished - 2012/03/09

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry

Fingerprint

Dive into the research topics of 'Charge transport characteristics in P3HT:PCBM organic blends under illumination: Influence of metal work functions'. Together they form a unique fingerprint.

Cite this