Semiconducting Group 15 Monolayers: A Broad Range of Band Gaps and High Carrier Mobilities

Shengli Zhang; Meiqiu Xie; Fengyu Li; Zhong Yan; Yafei Li; Erjun Kan; Wei Liu; Zhongfang Chen; Haibo Zeng

doi:10.1002/anie.201507568

Semiconducting Group 15 Monolayers: A Broad Range of Band Gaps and High Carrier Mobilities

Angew Chem Int Ed Engl. 2016 Jan 26;55(5):1666-9. doi: 10.1002/anie.201507568. Epub 2015 Dec 16.

Authors

Shengli Zhang¹, Meiqiu Xie¹, Fengyu Li², Zhong Yan¹, Yafei Li³, Erjun Kan¹, Wei Liu¹, Zhongfang Chen², Haibo Zeng⁴

Affiliations

¹ Institute of Optoelectronics & Nanomaterials, Jiangsu Ke, Laboratory of Advanced Micro & Nano Materials and Technology, College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China.
² Department of Chemistry, Institute for Functional Nanomaterials, University of Puerto Rico, Rio Piedras, San Juan, PR, 00931, USA.
³ College of Chemistry and Materials Science, Jiangsu Key Laboratory of Biofunctional Materials, Nanjing Normal University, Nanjing, 210023, China.
⁴ Institute of Optoelectronics & Nanomaterials, Jiangsu Ke, Laboratory of Advanced Micro & Nano Materials and Technology, College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China. zeng.haibo@njust.edu.cn.

PMID: 26671733
DOI: 10.1002/anie.201507568

Abstract

Optoelectronic applications require materials both responsive to objective photons and able to transfer carriers, so new two-dimensional (2D) semiconductors with appropriate band gaps and high mobilities are highly desired. A broad range of band gaps and high mobilities of a 2D semiconductor family, composed of monolayer of Group 15 elements (phosphorene, arsenene, antimonene, bismuthene) is presented. The calculated binding energies and phonon band dispersions of 2D Group 15 allotropes exhibit thermodynamic stability. The energy band gaps of 2D semiconducting Group 15 monolayers cover a wide range from 0.36 to 2.62 eV, which are crucial for broadband photoresponse. Significantly, phosphorene, arsenene, and bismuthene possess carrier mobilities as high as several thousand cm(2) V(-1) s(-1) . Combining such broad band gaps and superior carrier mobilities, 2D Group 15 monolayers are promising candidates for nanoelectronics and optoelectronics.

Keywords: 2D semiconductors; Group 15 monolayers; broadband photoresponse; density functional calculations; high mobility.

Publication types

Research Support, Non-U.S. Gov't