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나노 구조 물리 연구단
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Encapsulation of a Monolayer WSe2 Phototransistor with Hydrothermally Grown ZnO Nanorods

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Title
Encapsulation of a Monolayer WSe2 Phototransistor with Hydrothermally Grown ZnO Nanorods
Author(s)
Kang-Nyeoung Lee; Seungho Bang; Ngoc Thanh Duong; Seok Joon Yun; Dae Young Park; Juchan Lee; Young Chul Choi; Mun Seok Jeong
Publication Date
2019-06
Journal
ACS APPLIED MATERIALS & INTERFACES, v.11, no.22, pp.20257 - 20264
Publisher
AMER CHEMICAL SOC
Abstract
Transition metal dichalcogenides (TMDCs) are promising two-dimensional (2D) materials for realizing next-generation electronics and optoelectronics with attractive physical properties. However, monolayer TMDCs ((TMDCs)-T-1L) have various serious issues, such as instability under ambient conditions and low optical quantum yield from their extremely thin thickness of similar to 0.7 nm. To overcome these issues, we constructed a hybrid structure (HS) by growing zinc oxide nanorods (ZnO NRs) on a monolayer tungsten diselenide ((WSe2)-W-1L) using the hydrothermal method. Consequently, we confirmed not only enhanced photoluminescence of (WSe2)-W-1L but also improved optoelectronic properties by fabricating the HS phototransistor. Through various investigations, we found that these phenomena were due to the antenna and p-type doping effects attributed to the ZnO NRs. In addition, we verified that the optoelectronic properties of (TMDCs)-T-1L are maintained for 2 weeks in ambient condition through the sustainable encapsulation effect induced by our HS. This encapsulation method with inorganic materials is expected to be applied to improve the stability and performance of various emerging 2D material-based devices © 2019 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/6163
ISSN
1944-8244
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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