Title: Bending as a control knob for the electronic and optical properties of phosphorene nanoribbons

Journal Article · · Physical Review Materials

We have assessed mechanical bending as a powerful controlling tool for the electronic structure and optical properties of phosphorene nanoribbons. We use state-of-the-art density functional approximations in our work. The overall performance of the recently developed meta-generalized gradient approximation (meta-GGA) mTASK [Phys. Rev. Materials 5, 063803 (2021)] functional establishes the method as a useful alternative to the screened hybrid HSE06 for better band gaps of phosphorene nanoribbons. We present a detailed analysis to interpret the optical absorption of bent phosphorene nanoribbons using the GW-Bethe-Salpeter approximation. Finally, we demonstrate the important role of the unoccupied in-gap state and conclude that this in-gap state in armchair nanoribbons introduced by bending can significantly affect the properties of low-energy excitons and add some useful opportunities for applications in optoelectronic devices.

Research Organization:
Temple Univ., Philadelphia, PA (United States)
Sponsoring Organization:
National Science Foundation (NSF); US Army Research Laboratory (USARL); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0021263
OSTI ID:
1865825
Report Number(s):
DOE-Temple-21263-3; 1625061; W911NF-16-2-0189
Journal Information:
Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 1 Vol. 6; ISSN 2475-9953
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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