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Solution processed transparent anatase TiO(2) nanoparticles/MoO(3) nanostructures heterojunction: high performance self-powered UV detector for low-power and low-light applications

Ultraviolet (UV) photodetectors are considered as the major players in energy saving technology of the future. Efforts are needed to further develop such devices, which are capable of operating efficiently at low driving potential as well as with weak illumination. Herein, we report an all-oxide, hi...

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Autores principales: Ezhilmaran, Bhuvaneshwari, Dhanasekar, M., Bhat, S. Venkataprasad
Formato: Online Artículo Texto
Lenguaje:English
Publicado: RSC 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9419760/
https://www.ncbi.nlm.nih.gov/pubmed/36133282
http://dx.doi.org/10.1039/d0na00780c
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author Ezhilmaran, Bhuvaneshwari
Dhanasekar, M.
Bhat, S. Venkataprasad
author_facet Ezhilmaran, Bhuvaneshwari
Dhanasekar, M.
Bhat, S. Venkataprasad
author_sort Ezhilmaran, Bhuvaneshwari
collection PubMed
description Ultraviolet (UV) photodetectors are considered as the major players in energy saving technology of the future. Efforts are needed to further develop such devices, which are capable of operating efficiently at low driving potential as well as with weak illumination. Herein, we report an all-oxide, highly transparent TiO(2)/MoO(3) bilayer film, with nanoparticulate anatase TiO(2) as the platform, fabricated by a simple solution based method and demonstrate its use in UV photodetection. Photoconductivity measurement with 352 nm light reveals the self-powered UV detection capability of the device due to the built-in potential at the bilayer interface. The device exhibits a high photoresponsivity (46.05 A W(−1)), detectivity (2.84 × 10(12) Jones) and EQE (16 223%) even with a weak illumination of 76 μW cm(−2), at a low bias of only −1 V. The self-powered performance of the bilayer device is comparable to that of commercial Si photodetectors as well as other such UV detectors reported based on metal oxide heterojunctions. The improved and faster photoresponse shown by the device is due to the formation of an effective heterojunction, as evidenced by XPS, electrochemical and I–V studies. It can be further attributed to the better charge transport through the densely aligned nanostructures, reduced recombination and the better mobility of anatase TiO(2) nanoparticles. The performance is best-in-class and proves the potential of the transparent heterojunction to be used in highly responsive, self-powered UV detectors for low bias, low light applications.
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spelling pubmed-94197602022-09-20 Solution processed transparent anatase TiO(2) nanoparticles/MoO(3) nanostructures heterojunction: high performance self-powered UV detector for low-power and low-light applications Ezhilmaran, Bhuvaneshwari Dhanasekar, M. Bhat, S. Venkataprasad Nanoscale Adv Chemistry Ultraviolet (UV) photodetectors are considered as the major players in energy saving technology of the future. Efforts are needed to further develop such devices, which are capable of operating efficiently at low driving potential as well as with weak illumination. Herein, we report an all-oxide, highly transparent TiO(2)/MoO(3) bilayer film, with nanoparticulate anatase TiO(2) as the platform, fabricated by a simple solution based method and demonstrate its use in UV photodetection. Photoconductivity measurement with 352 nm light reveals the self-powered UV detection capability of the device due to the built-in potential at the bilayer interface. The device exhibits a high photoresponsivity (46.05 A W(−1)), detectivity (2.84 × 10(12) Jones) and EQE (16 223%) even with a weak illumination of 76 μW cm(−2), at a low bias of only −1 V. The self-powered performance of the bilayer device is comparable to that of commercial Si photodetectors as well as other such UV detectors reported based on metal oxide heterojunctions. The improved and faster photoresponse shown by the device is due to the formation of an effective heterojunction, as evidenced by XPS, electrochemical and I–V studies. It can be further attributed to the better charge transport through the densely aligned nanostructures, reduced recombination and the better mobility of anatase TiO(2) nanoparticles. The performance is best-in-class and proves the potential of the transparent heterojunction to be used in highly responsive, self-powered UV detectors for low bias, low light applications. RSC 2020-12-21 /pmc/articles/PMC9419760/ /pubmed/36133282 http://dx.doi.org/10.1039/d0na00780c Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Ezhilmaran, Bhuvaneshwari
Dhanasekar, M.
Bhat, S. Venkataprasad
Solution processed transparent anatase TiO(2) nanoparticles/MoO(3) nanostructures heterojunction: high performance self-powered UV detector for low-power and low-light applications
title Solution processed transparent anatase TiO(2) nanoparticles/MoO(3) nanostructures heterojunction: high performance self-powered UV detector for low-power and low-light applications
title_full Solution processed transparent anatase TiO(2) nanoparticles/MoO(3) nanostructures heterojunction: high performance self-powered UV detector for low-power and low-light applications
title_fullStr Solution processed transparent anatase TiO(2) nanoparticles/MoO(3) nanostructures heterojunction: high performance self-powered UV detector for low-power and low-light applications
title_full_unstemmed Solution processed transparent anatase TiO(2) nanoparticles/MoO(3) nanostructures heterojunction: high performance self-powered UV detector for low-power and low-light applications
title_short Solution processed transparent anatase TiO(2) nanoparticles/MoO(3) nanostructures heterojunction: high performance self-powered UV detector for low-power and low-light applications
title_sort solution processed transparent anatase tio(2) nanoparticles/moo(3) nanostructures heterojunction: high performance self-powered uv detector for low-power and low-light applications
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9419760/
https://www.ncbi.nlm.nih.gov/pubmed/36133282
http://dx.doi.org/10.1039/d0na00780c
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AT bhatsvenkataprasad solutionprocessedtransparentanatasetio2nanoparticlesmoo3nanostructuresheterojunctionhighperformanceselfpowereduvdetectorforlowpowerandlowlightapplications