Hybrid effects of CdSe/ZnS quantum dots on p-n heterojunction organic nanowire

Seok Ho Lee, Hyunsoo Lee, Sung Yeoun Park, Kihyun Kim, Yong Baek Lee, Jeongyong Kim, Kwang Sup Lee, Jinsoo Joo

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We demonstrate that the optical and photoresponsive electrical properties of a single nanowire (NW) consisting of a p-type poly(3-hexylthiophene) (P3HT) and n-type [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) were changed by hybridization with functionalized CdSe/ZnS QDs. Surface decorating and bulky infiltrating methods were employed for the hybridization of the QDs with the NWs. For the QD-infiltrated P3HT/PCBM single NW, the current density in both dark and light conditions was clearly enhanced and the nanoscale photoluminescence (PL) intensity was reduced due to the charge transfer effect. For the P3HT/PCBM NWs decorated with QDs, the current density was not changed much, however, the PL characteristics of both the QDs and the NWs were simultaneously changed by the energy transfer effect. From time-resolved PL spectra, the exciton lifetimes of the QDs in the hybrid NWs drastically decreased through the hybridization with the NWs, supporting the charge and/or energy transfer effects.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalSynthetic Metals
Volume163
Issue number1
DOIs
Publication statusPublished - 2013

Keywords

  • Charge transfer
  • Energy transfer
  • Heterojunction nanowire
  • Poly(3-hexylthiophene)
  • Quantum dots

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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