Doped and de-doped poly(3-methylthiophene) (P3MT) nanowires (NWs) were synthesized through electrochemical polymerization and functionalized CdSe/ZnS quantum dots (QDs) with blue and green emissions were homogeneously attached to the NW surfaces. The photoluminescence (PL) spectra of the QDs/P3MT single NWs indicated a drastic enhancement of PL intensity for both doped and de-doped NWs owing to the energy transfer effect from QDs to NWs. The QDs/de-doped P3MT NWs exhibited higher energy transfer efficiency because of a reduced screening effect for energy transfer, which was confirmed by a decrease in the exciton lifetime of the QDs, determined from time-resolved PL decay curves.
Bibliographical noteFunding Information:
This work was supported by a Korea Science and Engineering Foundation (KOSEF) grant funded by the Korean government (MEST) (No. 2012R1A2A2A01045102 ). One of us, K.-S. Lee acknowledges the funding for this work from the Active Polymer Center for Patterned Integration (ERC R11-2007-050-01002-0) of the National Research Foundation of Korea and the Asian Office of Aerospace Research and Development ( F/A 2386-11-1-4043 ), USA. We also thank the Korea Basic Science Institute (KBSI) for the use of equipment for time-resolved fluorescence confocal microscopy and HR-S/TEM.
- CdSe/ZnS quantum dot
- Energy transfer
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry