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Chemical Vapor-Deposited Hexagonal Boron Nitride as a Scalable Template for High-Performance Organic Field-Effect Transistors

Authors
Lee, Tae HoonKim, KwanpyoKim, GwangwooPark, Hyo JuScullion, DeclanShaw, LeoKim, Myung-GilGu, XiaodanBae, Won GyuSantos, Elton J. G.Lee, ZonghoonShin, Hyeon SukNishi, YoshioBao, Zhenan
Issue Date
Mar-2017
Publisher
AMER CHEMICAL SOC
Citation
CHEMISTRY OF MATERIALS, v.29, no.5, pp.2341 - 2347
Journal Title
CHEMISTRY OF MATERIALS
Volume
29
Number
5
Start Page
2341
End Page
2347
URI
http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/5489
DOI
10.1021/acs.chemmater.6b05517
ISSN
0897-4756
Abstract
Organic field-effect transistors have attracted much attention because of their potential use in low-cost, large area, flexible electronics. High-performance organic transistors require a low density of grain boundaries in their organic films and a decrease in the charge trap density at the semiconductor dielectric interface for efficient charge transport. In this respect, the role of the dielectric material is crucial because it primarily determines the growth of the film and the interfacial trap density. Here, we demonstrate the use of chemical vapor-deposited hexagonal boron nitride (CVD hBN) as a scalable growth template/dielectric for highperformance organic field-effect transistors. The field-effect transistors based on C-60 films grown on single-layer CVD h-BN exhibit an average mobility of 1.7 cm(2) V-1 s(-1) and a maximal mobility of 2.9 cm(2) s(-1) with on/off ratios of 10(7). The structural and morphology analysis shows that the epitaxial, two-dimensional growth of C-60 on CVD h-BN is mainly responsible for the superior charge transport behavior. We believe that CVD h-BN can serve as a growth template for various organic semiconductors, allowing the development of large-area, high-performance flexible electronics.
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