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나노 구조 물리 연구단
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FeIn2S4 Nanocrystals: A Ternary Metal Chalcogenide Material for Ambipolar Field-Effect Transistors

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Title
FeIn2S4 Nanocrystals: A Ternary Metal Chalcogenide Material for Ambipolar Field-Effect Transistors
Author(s)
Hyunjung Kim; Anand P. Tiwari; Eunhee Hwang; Yunhee Cho; Heemin Hwang; Sora Bak; Yeseul Hong; Hyoyoung Lee
Publication Date
2018-07
Journal
ADVANCED SCIENCE, v.5, no.7, pp.1800068 -
Publisher
WILEY
Abstract
An ambipolar channel layer material is required to realize the potential benefits of ambipolar complementary metal-oxide-semiconductor field-effect transistors, namely their compact and efficient nature, reduced reverse power dissipation, and possible applicability to highly integrated circuits. Here, a ternary metal chalcogenide nanocrystal material, FeIn2S4, is introduced as a solution-processable ambipolar channel material for field-effect transistors (FETs). The highest occupied molecular orbital and the lowest unoccupied molecular orbital of the FeIn2S4 nanocrystals are determined to be -5.2 and -3.75 eV, respectively, based upon cyclic voltammetry, X-ray photoelectron spectroscopy, and diffraction reflectance spectroscopy analyses. An ambipolar FeIn2S4 FET is successfully fabricated with Au electrodes (E-F = -5.1 eV), showing both electron mobility (14.96 cm(2) V-1 s(-1)) and hole mobility (9.15 cm(2) V-1 s(-1)) in a single channel layer, with an on/off current ratio of 10(5). This suggests that FeIn2S4 nanocrystals may be a promising alternative semiconducting material for next-generation integrated circuit development
URI
https://pr.ibs.re.kr/handle/8788114/5550
ISSN
2198-3844
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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