Use of side-chain incompatibility for tailoring long-range p/n heterojunctions: Photoconductive nanofibers formed by self-assembly of an amphiphilic donor-acceptor dyad consisting of oligothiophene and perylenediimide

Wei Shi Li, Akinori Saeki, Yohei Yamamoto, Takanori Fukushima, Shu Seki, Noriyuki Ishii, Kenichi Kato, Masaki Takata, Takuzo Aida

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)

Abstract

To tailor organic p/n heterojunctions with molecular-level precision, a rational design strategy using side-chain incompatibility of a covalently connected donor-acceptor (D-A) dyad has been successfully carried out. An oligothiophene-perylenediimide dyad, when modified with triethylene glycol side chains at one terminus and dodecyl side chains at the other (2Amphi), self-assembles into nanofibers with a long-range D/A heterojunction. In contrast, when the dyad is modified with dodecyl side chains at both termini (2Lipo), ill-defined microfibers result. In steady-state measurements using microgap electrodes, a cast film of the nanofiber of 2Amphi displays far better photoconducting properties than that of the microfiber of 2Lipo. Flash-photolysis time-resolved microwave conductivity measurements, in conjunction with transient absorption spectroscopy, clearly indicate that the nanofiber of 2Amphi intrinsically allows for better carrier generation and transport properties than the microfibrous assembly of 2Lipo.

Original languageEnglish
Pages (from-to)1566-1572
Number of pages7
JournalChemistry - An Asian Journal
Volume5
Issue number7
DOIs
Publication statusPublished - 2010 Jul 5
Externally publishedYes

Keywords

  • Amphiphiles
  • Heterojunctions
  • Nanostructures
  • Photoconduction
  • Self-assembly

ASJC Scopus subject areas

  • Biochemistry
  • Organic Chemistry

Fingerprint Dive into the research topics of 'Use of side-chain incompatibility for tailoring long-range p/n heterojunctions: Photoconductive nanofibers formed by self-assembly of an amphiphilic donor-acceptor dyad consisting of oligothiophene and perylenediimide'. Together they form a unique fingerprint.

Cite this