Twisted bilayer blue phosphorene: A direct band gap semiconductor

We report that two rotated layers of blue phosphorene behave as a direct band gap semiconductor. The optical spectrum shows absorption peaks in the visible region of the spectrum and in addition the energy of these peaks can be tuned with the rotational angle. These findings makes twisted bilayer bl...

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Bibliographic Details
Published in:arXiv.org 2016-07
Main Authors: Ospina, D A, Duque, C A, Correa, J D, Eric Suárez Morell
Format: Article
Language:English
Subjects:
Band gap
Bilayers
Energy gap
Phosphorene
Photovoltaic cells
Solar cells
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Summary:We report that two rotated layers of blue phosphorene behave as a direct band gap semiconductor. The optical spectrum shows absorption peaks in the visible region of the spectrum and in addition the energy of these peaks can be tuned with the rotational angle. These findings makes twisted bilayer blue phosphorene a strong candidate as a solar cell or photodetection device. Our results are based on ab initio calculations of several rotated blue phosphorene layers.
ISSN:2331-8422
DOI:10.48550/arxiv.1607.08831