Multifunctional Optoelectronics via Harnessing Defects in Layered Black Phosphorus

Ahmed, T, Kuriakose, S, Rahman, M, Bhaskaran, M, Sriram, S, Walia, S, Abbas, S, Spencer, M and Bansal, V et al, 2019, 'Multifunctional Optoelectronics via Harnessing Defects in Layered Black Phosphorus', Advanced Functional Materials, pp. 1-12.

Document type: Journal Article
Collection: Journal Articles

Title Multifunctional Optoelectronics via Harnessing Defects in Layered Black Phosphorus
Author(s) Ahmed, T
Kuriakose, S
Rahman, M
Bhaskaran, M
Sriram, S
Walia, S
Abbas, S
Spencer, M
Bansal, V et al,
Year 2019
Journal name Advanced Functional Materials
Start page 1
End page 12
Total pages 12
Publisher Wiley - V C H Verlag GmbH & Co. KGaA
Abstract Layered black phosphorus (BP), a promising 2D material, tends to oxidize under ambient conditions. While such defective BP is typically considered undesirable, defect engineering has in fact been exploited in contemporary materials to create new behaviors and functionalities. In this spirit, new opportunities arising from intrinsic defect states in BP, particularly through harnessing unique photoresponse characteristics, and demonstrating three distinct optoelectronic applications are demonstrated. First, the ability to distinguish between UV-A and UV-B radiations using a single material that has tremendous implications for skin health management is shown. Second, the same device is utilized to show an optically stimulated mimicry of synaptic behavior opening new possibilities in neuromorphic computing. Third, it is shown that serially connected devices can be used to perform digital logic operations using light. The underpinning photoresponse is further translated on flexible substrates, highlighting the viability of the technology for mechanically conformable and wearable systems. This demonstration paves the way toward utilizing the unexplored potential offered by defect engineering of 2D materials for applications spanning across a broad range of disciplines.
Subject Condensed Matter Modelling and Density Functional Theory
Quantum Chemistry
Electronic and Magnetic Properties of Condensed Matter; Superconductivity
Keyword(s) black phosphorus
defect engineering
negative photocurrent
DOI - identifier 10.1002/adfm.201901991
Copyright notice © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN 1616-301X
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