Hot electron induced NIR detection in CdS films

Hot electron induced NIR detection in CdS films

We report the use of random Au nanoislands to enhance the absorption of CdS photodetectors at wavelengths beyond its intrinsic absorption properties from visible to NIR spectrum enabling a high performance visible-NIR photodetector. The temperature dependent annealing method was employed to form ran...

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Main Authors: Sharma, Alka, Kumar, Rahul, Bhattacharyya, Biplab, Husale, Sudhir
Format: Online
Language:English
Published: Nature Publishing Group 2016
Online Access:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4786815/
id pubmed-4786815
recordtype oai_dc
spelling pubmed-47868152016-03-11 Hot electron induced NIR detection in CdS films Sharma, Alka Kumar, Rahul Bhattacharyya, Biplab Husale, Sudhir Article We report the use of random Au nanoislands to enhance the absorption of CdS photodetectors at wavelengths beyond its intrinsic absorption properties from visible to NIR spectrum enabling a high performance visible-NIR photodetector. The temperature dependent annealing method was employed to form random sized Au nanoparticles on CdS films. The hot electron induced NIR photo-detection shows high responsivity of ~780 mA/W for an area of ~57 μm2. The simulated optical response (absorption and responsivity) of Au nanoislands integrated in CdS films confirms the strong dependence of NIR sensitivity on the size and shape of Au nanoislands. The demonstration of plasmon enhanced IR sensitivity along with the cost-effective device fabrication method using CdS film enables the possibility of economical light harvesting applications which can be implemented in future technological applications. Nature Publishing Group 2016-03-11 /pmc/articles/PMC4786815/ /pubmed/26965055 http://dx.doi.org/10.1038/srep22939 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
repository_type Open Access Journal
institution_category Foreign Institution
institution US National Center for Biotechnology Information
building NCBI PubMed
collection Online Access
language English
format Online
author Sharma, Alka
Kumar, Rahul
Bhattacharyya, Biplab
Husale, Sudhir
spellingShingle Sharma, Alka
Kumar, Rahul
Bhattacharyya, Biplab
Husale, Sudhir
Hot electron induced NIR detection in CdS films
author_facet Sharma, Alka
Kumar, Rahul
Bhattacharyya, Biplab
Husale, Sudhir
author_sort Sharma, Alka
title Hot electron induced NIR detection in CdS films
title_short Hot electron induced NIR detection in CdS films
title_full Hot electron induced NIR detection in CdS films
title_fullStr Hot electron induced NIR detection in CdS films
title_full_unstemmed Hot electron induced NIR detection in CdS films
title_sort hot electron induced nir detection in cds films
description We report the use of random Au nanoislands to enhance the absorption of CdS photodetectors at wavelengths beyond its intrinsic absorption properties from visible to NIR spectrum enabling a high performance visible-NIR photodetector. The temperature dependent annealing method was employed to form random sized Au nanoparticles on CdS films. The hot electron induced NIR photo-detection shows high responsivity of ~780 mA/W for an area of ~57 μm2. The simulated optical response (absorption and responsivity) of Au nanoislands integrated in CdS films confirms the strong dependence of NIR sensitivity on the size and shape of Au nanoislands. The demonstration of plasmon enhanced IR sensitivity along with the cost-effective device fabrication method using CdS film enables the possibility of economical light harvesting applications which can be implemented in future technological applications.
publisher Nature Publishing Group
publishDate 2016
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4786815/
_version_ 1613550418146623488

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