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  • Aarnio, HarriAbo Akad University (author)

Spontaneous Charge Transfer and Dipole Formation at the Interface Between P3HT and PCBM

  • Article/chapterEnglish2011

Publisher, publication year, extent ...

  • 2011-06-17
  • Wiley-VCH Verlag Berlin,2011
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:liu-71375
  • https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-71375URI
  • https://doi.org/10.1002/aenm.201100074DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • |
  • In the pursuit of developing new materials for more efficient bulk-heterojunction solar cells, the blend poly (3-hexylthiophene):[ 6,6]-phenyl-C(61)-butyric acid methyl ester (P3HT:PCBM) serves as an important model system. The success of the P3HT: PCBM blend comes from efficient charge generation and transport with low recombination. There is not, however, a good microscopic picture of what causes these, hindering the development of new material systems. In this report UV photoelectron spectroscopy measurements on both regiorandom-(rra) and regioregular-(rr) P3HT are presented, and the results are interpreted using the Integer Charge Transfer model. The results suggest that spontaneous charge transfer from P3HT to PCBM occurs after heat treatment of P3HT: PCBM blends. The resulting formation of an interfacial dipole creates an extra barrier at the interface explaining the reduced (non-)geminate recombination with increased charge generation in heat treated rr-P3HT: PCBM blends. Extensive photoinduced absorption measurements using both above-and below-bandgap excitation light are presented, in good agreement with the suggested dipole formation.

Subject headings and genre

  • TECHNOLOGY
  • TEKNIKVETENSKAP

Added entries (persons, corporate bodies, meetings, titles ...)

  • Sehati, ParisaLinköpings universitet,Tekniska högskolan,Ytors Fysik och Kemi(Swepub:liu)parse58 (author)
  • Braun, SlawomirLinköpings universitet,Ytors Fysik och Kemi,Tekniska högskolan(Swepub:liu)slama19 (author)
  • Nyman, MathiasAbo Akad University (author)
  • de Jong, Michel PUniversity of Twente (author)
  • Fahlman, MatsLinköpings universitet,Ytors Fysik och Kemi,Tekniska högskolan(Swepub:liu)matfa21 (author)
  • Osterbacka, RonaldAbo Akad University (author)
  • Abo Akad UniversityTekniska högskolan (creator_code:org_t)

Related titles

  • In:Advanced Energy Materials: Wiley-VCH Verlag Berlin1:5, s. 792-7971614-68321614-6840

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