The development of semiconductor films from nanocrystal suspensions is a promising alternative to conventional methods of film deposition. The benefits are significant cost reduction and the possibility of tuning the charges energy in nanocrystals via nanoparticle size. These advantages of nanocrystal films may be deployed in fabrication of field-effect transistors. Our research is focused on the strategy development for low-temperature processing of colloidal nanocrystals into all-inorganic films through encapsulation of nanocrystal arrays into a matrix of a bulk semiconductor. For investigating charge transfer characteristics, PbS/CdS nanocrystals are used to reveal the influence of the distance between individual quantum dots in the array on the current. Moreover, the influence of the film surface passivation and the presence of ligands on the charge carrier mobility are discussed as well. Nanocrystal matrix encapsulation, followed by the semiconductor film formation on top of the standard silicon wafer substrate, is the main steps of TFT fabrication.

Fabrication of thin film field-effect transistors through matrix encapsulation of nanocrystal arrays

243rd National Meeting (2012)

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