Inderscience Publishers

Charge transport in hybrid solution processed heterojunction based on P3HT and ZnO from bilayer to blend

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Ambipolar hybrid transistors were fabricated by using inorganic zinc oxide (ZnO) nanoparticles and an organic polymer, poly(3-hexylthiophene) (P3HT), as
n
- and
p
-type semiconductors, respectively. With well-adjusted ratio between
n
- and
p
-type, an ambipolar transport was observed in thin films based on either bilayer ZnO/P3HT or blend ZnO:P3HT architectures. Morphology of solution-processed thin films was studied by scanning electron microscopy (SEM). A hybrid interface was formed by the direct contact between ZnO and P3HT leading to carrier redistribution. Such solution-processed hybrid thin-film transistors delivered in air well balanced electron and hole mobilities for both bilayer and blend architectures.

Keywords: ZnO, P3HT, heterojunction, thin film, morphology, ambipolar thin-film transistor.

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