4.6 Article

Organic-inorganic heterojunction field-effect transistors

期刊

JOURNAL OF APPLIED PHYSICS
卷 107, 期 2, 页码 -

出版社

AMER INST PHYSICS
DOI: 10.1063/1.3291135

关键词

high electron mobility transistors; molybdenum compounds; photoelectron spectra

资金

  1. CityU Strategic Research [7002271]
  2. National Natural Science Foundation of China [50803063]

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Field-effect transistors with organic-inorganic heterojunctions of molybdenum trioxide (MoO3)/pentacene and MoO3/copper-phthalocyanine (CuPc) as active layers were prepared and analyzed. These transistors showed normally-on operation mode and a shift of threshold voltage comparing to the corresponding single-layer organic device. The interfacial electronic structures of MoO3/pentacene and MoO3/CuPc heterojunctions were investigated by ultraviolet photoemission spectroscopy. Significant electron energy level bending and space charge regions of high conductivity were observed at the heterojunction. Formation of the organic-inorganic heterojunctions and characteristics of the corresponding field-effect transistors were analyzed by considering charge exchange at heterojunction interfaces.

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