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Effects of morphological control on the characteristics of vertical-type OTFTs using Alq3
Young Do Kim1, Jong Wook Park, In Nam Kang
1Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 121-742, Republic of Korea.
Abstract:
We have fabricated vertical-type organic thin-film transistors (OTFTs) using tris-(8-hydroxyquinoline) aluminum (Alq(3)) as an n-type active material. Vertical-type OTFT using Alq(3) has a layered structure of Al(source electrode)/Alq(3)(active layer)/Al(gate electrode)/Alq(3)(active layer)/ITO glass(drain electrode). Alq(3) thin films containing various surface morphologies could be obtained by the control of evaporation rate and substrate temperature. The effects of the morphological control of Alq(3) thin layer on the grain size and the flatness of film surface were investigated. The characteristics of vertical-type OTFT significantly influenced the growth condition of Alq(3) layer.
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