Producing air-stable monolayers of phosphorene and their defect engineering

Jiajie Pei, Xin Gai (), Jiong Yang, Xibin Wang, Zongfu Yu, Duk-Yong Choi, Barry Luther-Davies and Yuerui Lu ()
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Jiajie Pei: Research School of Engineering, College of Engineering and Computer Science, the Australian National University
Xin Gai: CUDOS, Laser Physics Centre, Research School of Physics and Engineering, the Australian National University
Jiong Yang: Research School of Engineering, College of Engineering and Computer Science, the Australian National University
Xibin Wang: School of Mechanical Engineering, Beijing Institute of Technology
Zongfu Yu: University of Wisconsin, Madison
Duk-Yong Choi: CUDOS, Laser Physics Centre, Research School of Physics and Engineering, the Australian National University
Barry Luther-Davies: CUDOS, Laser Physics Centre, Research School of Physics and Engineering, the Australian National University
Yuerui Lu: Research School of Engineering, College of Engineering and Computer Science, the Australian National University

Nature Communications, 2016, vol. 7, issue 1, 1-8

Abstract: Abstract It has been a long-standing challenge to produce air-stable few- or monolayer samples of phosphorene because thin phosphorene films degrade rapidly in ambient conditions. Here we demonstrate a new highly controllable method for fabricating high quality, air-stable phosphorene films with a designated number of layers ranging from a few down to monolayer. Our approach involves the use of oxygen plasma dry etching to thin down thick-exfoliated phosphorene flakes, layer by layer with atomic precision. Moreover, in a stabilized phosphorene monolayer, we were able to precisely engineer defects for the first time, which led to efficient emission of photons at new frequencies in the near infrared at room temperature. In addition, we demonstrate the use of an electrostatic gate to tune the photon emission from the defects in a monolayer phosphorene. This could lead to new electronic and optoelectronic devices, such as electrically tunable, broadband near infrared lighting devices operating at room temperature.

Date: 2016
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DOI: 10.1038/ncomms10450

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