Suppression of extra carriers for enhanced intrinsic piezoelectric properties of ultrathin MoS2 through various metal dopants

被引：5
作者：
Han, Sang [1 ,2 ]
Moon, Janghyuk [3 ]
Yum, Han-Yup [1 ,2 ]
Park, Min-Sik [1 ,4 ]
Kim, Sang-Woo [2 ,5 ,6 ]
Kim, Jung Ho [1 ,2 ]
机构：
[1] Univ Wollongong, Australian Inst Innovat Mat, Inst Superconducting & Elect Mat, Squires Way, North Wollongong, NSW 2500, Australia
[2] Sungkyunkwan Univ SKKU, Sch Adv Mat Sci & Engn, Suwon 16419, South Korea
[3] Chung Ang Univ, Sch Energy Syst Engn, 84 Heukseok Ro, Seoul 06974, South Korea
[4] Kyung Hee Univ, Integrated Educ Inst Frontier Sci Technol BK21 Fo, Dept Adv Mat Engn Informat & Elect, 1732 Deogyeong Daero, Yongin 17104, South Korea
[5] Sungkyunkwan Univ SKKU, SKKU Adv Inst Nanotechnol SAINT, Suwon 16419, South Korea
[6] Sungkyunkwan Univ SKKU, Samsung Adv Inst Hlth Sci & Technol SAIHST, Suwon 16419, South Korea
来源：
COMPOSITES PART B-ENGINEERING | 2022年 / 246卷
基金：
新加坡国家研究基金会;
关键词：
Piezoelectric; Molybdenum disulfide; Metal doping; Density functional theory; PHOSPHORUS-DOPED MOS2; MONOLAYER MOS2; LAYER MOS2;
D O I：
10.1016/j.compositesb.2022.110205
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study the piezoelectric behavior of metal-doped monolayer MoS2. Its three-dimensional charge density, work function (WF), and piezoresponse with various metal dopants are theoretically predicted based on density functional theory, and the real-time piezoelectric power of these samples is experimentally verified. Selected p -type metal dopants (Au, Ag, Pd, Pt, and Al) increase the WF of monolayer MoS2, affecting electron emission from the MoS2 surface. The reason is that p-type metal dopants suppress excess electrons and prevent screening effects. A nanogenerator constructed from Au-doped monolayer MoS2 has been used to explore the possibility of a practical device.
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页数：6
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