Energy level alignment of poly(3-hexylthiophene): [6,6]-phenyl C61butyric acid methyl ester bulk heterojunction

Zheng Xu, Li Min Chen, Mei Hsin Chen, Gang Li, Yang Yang

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151 Citations (Scopus)


Photoelectron spectroscopy was used to investigate poly(3-hexylthiophene) (P3HT), [6,6]-phenyl C61butyric acid methyl ester (PCBM), and their blends on various conductive substrates. The study shows a P3HT-rich layer at the top of the P3HT:PCBM blend films. The energy level alignment of the top P3HT changes with the work function of the substrate and the PCBM concentration at the bottom surface of the blend film. The results can be explained using the integer charge transfer model.
Original languageEnglish
Article number013301
JournalApplied Physics Letters
Issue number1
Publication statusPublished - 20 Jul 2009
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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