ORIGINAL ARTICLE
Large-area high quality PtSe
2
thin film with versatile polarity
Wei Jiang
1,2
| Xudong Wang
1
| Yan Chen
1,2
| Guangjian Wu
1
| Kun Ba
3
|
Ningning Xuan
3
| Yangye Sun
3
| Peng Gong
3
| Jingxian Bao
4
| Hong Shen
1
|
Tie Lin
1
| Xiangjian Meng
1
| Jianlu Wang
1
| Zhengzong Sun
3
1
National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai, China
2
University of Chinese Academy of Sciences, Beijing, China
3
Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai, China
4
Department of Chemistry, Shanghai University, Shanghai, China
Correspondence
Jianlu Wang, National Laboratory for
Infrared Physics, Shanghai Institute of
Technical Physics, Chinese Academy of
Sciences, 500 Yu Tian Road, Shanghai
200083, China.
Email: jlwang@mail.sitp.ac.cn
Zhengzong Sun, Department of Chemistry
and Shanghai Key Laboratory of Molecular
Catalysis and Innovative Materials, Fudan
University, 220 Handan Road, Shanghai
200433, China.
Email: zhengzong_sun@fudan.edu.cn
Funding information
1000 Plan Program for Young Talents; Key
Research Project of Frontier Sciences of
Chinese Academy of Sciences, Grant/Award
Numbers: QYZDB-SSW-JSC016, QYZDB-
SSW-JSC042; National Key Research and
Development Program of China, Grant/
Award Numbers: 2016YFA0203900,
2017YFA0207303; National Natural Science
Foundation of China, Grant/Award
Numbers: 21771040, 61574151, 61574152,
61722408, 61835012
Abstract
Two-dimensional (2D) materials have attracted increasing attention for their
outstanding structural an d electrical properties. However, for m ass-production of
field effect transistors (FETs) and potential applications in integrated circuits, large-area
and uniform 2D thin films with high mobility, large on-off ratio, and desired polarity
are needed to synthesize firstly. Here, a transfer-free growth method for platinum dis-
elenide (PtSe
2
) films has been developed. The PtSe
2
films have been synthesized with
various th icknesses in centimeter-sized scale. Typical FET made from a few layer
PtSe
2
show p-type unipolar, with a high field-effect hole mobility of 6.2 cm
2
V
−1
s
−1
and an on-off ratio of 5 × 10
3
. The versatile semimetal-unipolar-ambipolar transition in
synthesized PtSe
2
films is also firstly observed as the thickness thinning. This work
realizes the large-sca le preparation of PtSe
2
with prominent electrical properties and
provides a new strategy for polarity's modulation.
KEYWORDS
2D materials, large-area, platinum diselenide, polarity
1 | INTRODUCTION
Two-dimensional (2D) transition-metal dichalcogenides
(TMDCs), such as molybdenum disulfide (MoS
2
), molybde-
num ditelluride, and tungsten diselenide, have attracted much
attention for their outstanding electronic, optical properties,
and potential applications in devices.
1-13
Different from
traditional bulk semiconductors, whose p-type and n-type can
be easily created through doping with heteroatoms, most 2D
materials display an inherent as-grown polarity, such as the
typical n-type behavior for 2H MoS
2
.
14-16
Moreover, this
polarity in most 2D materials is hard to be reversed or
controlled.
Received: 7 March 2019 Revised: 26 April 2019 Accepted: 1 May 2019
DOI: 10.1002/inf2.12013
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original
work is properly cited.
© 2019 The Authors. InfoMat published by John Wiley & Sons Australia, Ltd on behalf of UESTC.
InfoMat. 2019;1–8. wileyonlinelibrary.com/journal/inf2 1