BROWSE

Related Scientist

Dong, Jichen's photo.

Dong, Jichen
다차원 탄소재료 연구단
more info

ITEM VIEW & DOWNLOAD

Two-Dimensional Palladium Diselenide with Strong In-Plane Optical Anisotropy and High Mobility Grown by Chemical Vapor Deposition

Cited 0 time in webofscience Cited 0 time in scopus
44 Viewed 0 Downloaded
Title
Two-Dimensional Palladium Diselenide with Strong In-Plane Optical Anisotropy and High Mobility Grown by Chemical Vapor Deposition
Author(s)
Yiyi Gu; Hui Cai; Jichen Dong; Yiling Yu; Anna N. Hoffman; Chenze Liu; Akinola D. Oyedele; Yu-Chuan Lin; Zhuozhi Ge; Alexander A. Puretzky; Gerd Duscher; Matthew F. Chisholm; Philip D. Rack; Christopher M. Rouleau; Zheng Gai; Xiangmin Meng; Feng Ding; David B. Geohegan; Kai Xiao
Publication Date
2020-03
Journal
Advanced Materials, v.32, no.19, pp.1 - 10
Publisher
WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Abstract
KGaA, WeinheimTwo-dimensional (2D) palladium diselenide (PdSe2) has strong interlayer coupling and a puckered pentagonal structure, leading to remarkable layer-dependent electronic structures and highly anisotropic in-plane optical and electronic properties. However, the lack of high-quality, 2D PdSe2 crystals grown by bottom-up approaches limits the study of their exotic properties and practical applications. In this work, chemical vapor deposition growth of highly crystalline few-layer (≥2 layers) PdSe2 crystals on various substrates is reported. The high quality of the PdSe2 crystals is confirmed by low-frequency Raman spectroscopy, scanning transmission electron microscopy, and electrical characterization. In addition, strong in-plane optical anisotropy is demonstrated via polarized Raman spectroscopy and second-harmonic generation maps of the PdSe2 flakes. A theoretical model based on kinetic Wulff construction theory and density functional theory calculations is developed and described the observed evolution of “square-like” shaped PdSe2 crystals into rhombus due to the higher nucleation barriers for stable attachment on the (1,1) and (1,−1) edges, which results in their slower growth rates. Few-layer PdSe2 field-effect transistors reveal tunable ambipolar charge carrier conduction with an electron mobility up to ≈294 cm2 V−1 s−1, which is comparable to that of exfoliated PdSe2, indicating the promise of this anisotropic 2D material for electronics
URI
https://pr.ibs.re.kr/handle/8788114/9009
DOI
10.1002/adma.201906238
ISSN
0935-9648
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > 1. Journal Papers (저널논문)
Files in This Item:
There are no files associated with this item.

qrcode

  • facebook

    twitter

  • Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse