Direct evidence of type II band alignment in nanoscale P3HT/CdSe heterostructures

Chun Hsiung Wang, Chih Wei Chen, Yung Ting Chen, Chiang Ting Chen, Yang Fang Chen, Shang Wei Chou, Chia Chun Chen

    研究成果: 雜誌貢獻文章同行評審

    5 引文 斯高帕斯(Scopus)

    摘要

    Due to inherent advantages of both constituent materials, organic/inorganic hybrid composites have attracted increasing attention. One of the fundamental issues needed to be resolved is their band alignment, which governs most of the electrical and optical properties. Here, we report the investigation of optical transition in poly(3-hexylthiophene) (P3HT)/CdSe nano-composites (NCs). It is found that the relaxation dynamics of photo-carriers in NCs is dominated by charge separation effects. Based on the band bending effect and the quantum confinement energy of electrons in the conduction band of CdSe quantum dots, we provide direct evidence of type II band alignment in P3HT/CdSe NCs. The establishment of a type II transition in NCs is very useful for the future design of efficient optoelectronic devices based on conjugated polymer/semiconductor hybrid systems.

    原文英語
    文章編號065202
    期刊Nanotechnology
    22
    發行號6
    DOIs
    出版狀態已發佈 - 2011 二月 11

    ASJC Scopus subject areas

    • Bioengineering
    • Chemistry(all)
    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering
    • Electrical and Electronic Engineering

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