Hybrid effect of doped and de-doped poly(3-methylthiophene) nanowires with CdSe/ZnS quantum dots: Nanoscale luminescence variation

• DOI: 10.1016/j.synthmet.2012.12.025
• Publication Date: 2013-01-20T17:05:48Z
• Authors: Sunmi Lee; Youg-baek Lee; Sung-yeoun Park; Hyunsoo Lee; Jeongyong Kim; Kwang-Sup Lee; Jinsoo Joo
• Keywords: 02 engineering and technology; 0210 nano-technology; 7. Clean energy

Abstract 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.