Effect of SWNT Defects on the Electron Transfer Properties in P3HT/SWNT Hybrid Materials

Authors

  • Jianxin Geng,

    1. Department of Chemical and Biomolecular Engineering (BK-21) Korea Advanced Institute of Science and Technology 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701 (Korea)
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  • Byung-Seon Kong,

    1. Department of Chemical and Biomolecular Engineering (BK-21) Korea Advanced Institute of Science and Technology 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701 (Korea)
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  • Seung Bo Yang,

    1. Department of Chemical and Biomolecular Engineering (BK-21) Korea Advanced Institute of Science and Technology 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701 (Korea)
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  • Sang Cheon Youn,

    1. Department of Chemical and Biomolecular Engineering (BK-21) Korea Advanced Institute of Science and Technology 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701 (Korea)
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  • Sohyun Park,

    1. Department of Chemistry, Pohang University of Science and Technology, Pohang, 790-784 (Korea)
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  • Taiha Joo,

    1. Department of Chemistry, Pohang University of Science and Technology, Pohang, 790-784 (Korea)
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  • Hee-Tae Jung

    Corresponding author
    1. Department of Chemical and Biomolecular Engineering (BK-21) Korea Advanced Institute of Science and Technology 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701 (Korea)
    • Department of Chemical and Biomolecular Engineering (BK-21) Korea Advanced Institute of Science and Technology 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701 (Korea).
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  • This work was supported by the National Research Laboratory Program of the Korea Science & Engineering Foundation (KOSEF), the Center for Nanoscale Mechatronics & Manufacturing (CNMM), and the Blue Ocean Program of Small and Medium Business Administration. We thank Dr. Dan Zhao in the Department of Material Sciences and Engineering at KAIST for helpful discussions. Supporting Information is available online from Wiley InterScience or from the authors.

Abstract

Poly(3-hexylthiophene) (P3HT) hybrids with single-walled carbon nanotubes (SWNTs) were prepared using a series of SWNTs with various defect contents on their surfaces. The hybrids were synthesized by exploiting the ππ interaction between P3HT and the SWNTs, resulting in efficient dispersion of the carbon nanotubes in the P3HT solution. UV-visible and photoluminescence (PL) spectra showed that the carbon nanotubes quench the PL of P3HT in the hybrids, indicating that electron transfer occurs from photo-excited P3HT to the SWNTs. This electron transfer from P3HT to carbon nanotubes was disrupted by the presence of defects on the SWNT surfaces. However, the PL lifetime of P3HT in the hybrids was found to be the same as that of pure P3HT in solution, indicating the formation of a ground-state non-fluorescent complex of P3HT/SWNTs.

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