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Room Temperature Bias-Selectable, Dual-Band Infrared Detectors Based on Lead Sulfide Colloidal Quantum Dots and Black Phosphorus.
Wang, Shifan; Ashokan, Arun; Balendhran, Sivacarendran; Yan, Wei; Johnson, Brett C; Peruzzo, Alberto; Crozier, Kenneth B; Mulvaney, Paul; Bullock, James.
Afiliação
  • Wang S; Department of Electrical and Electronic Engineering, University of Melbourne, Melbourne, Victoria 3010, Australia.
  • Ashokan A; ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne, Melbourne, Victoria 3010, Australia.
  • Balendhran S; School of Physics, University of Melbourne, Melbourne, Victoria 3010, Australia.
  • Yan W; ARC Centre of Excellence for Transformative Meta-Optical System (TMOS), The University of Melbourne, Melbourne, Victoria 3010, Australia.
  • Johnson BC; Department of Electrical and Electronic Engineering, University of Melbourne, Melbourne, Victoria 3010, Australia.
  • Peruzzo A; School of Science, RMIT University, Melbourne, Victoria 3001, Australia.
  • Crozier KB; Quantum Photonics Laboratory and Centre for Quantum Computation and Communication Technology, RMIT University, Melbourne, Victoria 3000, Australia.
  • Mulvaney P; Department of Electrical and Electronic Engineering, University of Melbourne, Melbourne, Victoria 3010, Australia.
  • Bullock J; School of Physics, University of Melbourne, Melbourne, Victoria 3010, Australia.
ACS Nano ; 17(12): 11771-11782, 2023 Jun 27.
Article em En | MEDLINE | ID: mdl-37318109
ABSTRACT
A single photodetector capable of switching its peak spectral photoresponse between two wavelength bands is highly useful, particularly for the infrared (IR) bands in applications such as remote sensing, object identification, and chemical sensing. Technologies exist for achieving dual-band IR detection with bulk III-V and II-VI materials, but the high cost and complexity as well as the necessity for active cooling associated with some of these technologies preclude their widespread adoption. In this study, we leverage the advantages of low-dimensional materials to demonstrate a bias-selectable dual-band IR detector that operates at room temperature by using lead sulfide colloidal quantum dots and black phosphorus nanosheets. By switching between zero and forward bias, these detectors switch peak photosensitive ranges between the mid- and short-wave IR bands with room temperature detectivities of 5 × 109 and 1.6 × 1011 cm Hz1/2 W-1, respectively. To the best of our knowledge, these are the highest reported room temperature values for low-dimensional material dual-band IR detectors to date. Unlike conventional bias-selectable detectors, which utilize a set of back-to-back photodiodes, we demonstrate that under zero/forward bias conditions the device's operation mode instead changes between a photodiode and a phototransistor, allowing additional functionalities that the conventional structure cannot provide.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: ACS Nano Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Austrália

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: ACS Nano Ano de publicação: 2023 Tipo de documento: Article País de afiliação: Austrália