Sub-millimeter Size High Mobility Single Crystal MoSe Monolayers Synthesized by NaCl-assisted Chemical Vapor Deposition

Overview

Journal RSC Adv

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2022 May 2

PMID 35494696

Authors

Juncheng Li

Wenjie Yan

Yanhui Lv

Jian Leng

Duan Zhang

Cormac O Coileain

Conor P Cullen

Tanja Stimpel-Lindner

Georg S Duesberg

Jiung Cho

Miri Choi

Byong Sun Chun

Yanfeng Zhao

Chengzhai Lv

Sunil K Arora

Han-Chun Wu

Affiliations

Soon will be listed here.

Abstract

Monolayer MoSe is a transition metal dichalcogenide with a narrow bandgap, high optical absorbance and large spin-splitting energy, giving it great promise for applications in the field of optoelectronics. Producing monolayer MoSe films in a reliable and scalable manner is still a challenging task as conventional chemical vapor deposition (CVD) or exfoliation based techniques are limited due to the small domains/nanosheet sizes obtained. Here, based on NaCl assisted CVD, we demonstrate the simple and stable synthesis of sub-millimeter size single-crystal MoSe monolayers with mobilities ranging from 38 to 8 cm V s. The average mobility is 12 cm V s. We further determine that the optical responsivity of monolayer MoSe is 42 mA W, with an external quantum efficiency of 8.22%.

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