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Charge transport in lead sulfide quantum dots/phthalocyanines hybrid nanocomposites

Chandana Pal, Lydia Sosa-Vargas, Jesus Ojeda Ledo Orcid Logo, Ashwani K. Sharma, Andrew N. Cammidge, Michael J. Cook, Asim K. Ray

Organic Electronics, Volume: 44, Pages: 132 - 143

Swansea University Author: Jesus Ojeda Ledo Orcid Logo

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DOI (Published version): 10.1016/j.orgel.2017.02.014

Abstract

A hybrid composite of non-aggregated lead sulfide (PbS) nanoparticles of average size 5.8 ± 1 nm embedded within a film of an octaalkyl substituted metal-free phthalocyanine (Compound 2) was prepared on interdigitated gold electrodes by mild acidic treatment of newly synthesised octasubstituted lead...

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Published in: Organic Electronics
ISSN: 1566-1199
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa32002
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spelling 2021-02-15T15:21:15.0952573 v2 32002 2017-02-16 Charge transport in lead sulfide quantum dots/phthalocyanines hybrid nanocomposites 4c1c9800dffa623353dff0ab1271be64 0000-0002-2046-1010 Jesus Ojeda Ledo Jesus Ojeda Ledo true false 2017-02-16 CHEG A hybrid composite of non-aggregated lead sulfide (PbS) nanoparticles of average size 5.8 ± 1 nm embedded within a film of an octaalkyl substituted metal-free phthalocyanine (Compound 2) was prepared on interdigitated gold electrodes by mild acidic treatment of newly synthesised octasubstituted lead phthalocyanine analogue (Compound 1) in solid state phase. This nanocomposite film shows an enhancement of in-plane electrical conductivity over that of a film of octaalkyl substituted metal-free phthalocyanine alone by nearly 65%. This observation is consistent with the formation of charge complex compound as indicated by Raman and XPS data. The presence of PbS in the composite was examined on the basis of XRD peak positions which are comparable with those of bulk PbS. A band gap of 2.22 eV was calculated from optical absorption data using Tauc's law, implying quantum confinement. The mono dispersal behaviour of PbS nanoparticles was established from TEM and XRD studies. The hopping conduction mechanism is found to be primarily responsible for charge transport in the hybrid nanocomposite film with the hopping distance larger than PbS diameter. Journal Article Organic Electronics 44 132 143 1566-1199 Bohr radius; Quantum confinement; Photophysical quenching; Percolation limit; Hopping conduction; Memristors 28 2 2017 2017-02-28 10.1016/j.orgel.2017.02.014 COLLEGE NANME Chemical Engineering COLLEGE CODE CHEG Swansea University 2021-02-15T15:21:15.0952573 2017-02-16T11:31:31.6658425 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering Chandana Pal 1 Lydia Sosa-Vargas 2 Jesus Ojeda Ledo 0000-0002-2046-1010 3 Ashwani K. Sharma 4 Andrew N. Cammidge 5 Michael J. Cook 6 Asim K. Ray 7 0032002-21022017135433.pdf OPEN_ACCESS_1-s2.0-S156611991730068X-main.pdf 2017-02-21T13:54:33.6970000 Output 2163714 application/pdf Version of Record true 2017-02-21T00:00:00.0000000 This is an open access article under the CC BY license true eng http://creativecommons.org/licenses/by/4.0/
title Charge transport in lead sulfide quantum dots/phthalocyanines hybrid nanocomposites
spellingShingle Charge transport in lead sulfide quantum dots/phthalocyanines hybrid nanocomposites
Jesus Ojeda Ledo
title_short Charge transport in lead sulfide quantum dots/phthalocyanines hybrid nanocomposites
title_full Charge transport in lead sulfide quantum dots/phthalocyanines hybrid nanocomposites
title_fullStr Charge transport in lead sulfide quantum dots/phthalocyanines hybrid nanocomposites
title_full_unstemmed Charge transport in lead sulfide quantum dots/phthalocyanines hybrid nanocomposites
title_sort Charge transport in lead sulfide quantum dots/phthalocyanines hybrid nanocomposites
author_id_str_mv 4c1c9800dffa623353dff0ab1271be64
author_id_fullname_str_mv 4c1c9800dffa623353dff0ab1271be64_***_Jesus Ojeda Ledo
author Jesus Ojeda Ledo
author2 Chandana Pal
Lydia Sosa-Vargas
Jesus Ojeda Ledo
Ashwani K. Sharma
Andrew N. Cammidge
Michael J. Cook
Asim K. Ray
format Journal article
container_title Organic Electronics
container_volume 44
container_start_page 132
publishDate 2017
institution Swansea University
issn 1566-1199
doi_str_mv 10.1016/j.orgel.2017.02.014
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Chemical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemical Engineering
document_store_str 1
active_str 0
description A hybrid composite of non-aggregated lead sulfide (PbS) nanoparticles of average size 5.8 ± 1 nm embedded within a film of an octaalkyl substituted metal-free phthalocyanine (Compound 2) was prepared on interdigitated gold electrodes by mild acidic treatment of newly synthesised octasubstituted lead phthalocyanine analogue (Compound 1) in solid state phase. This nanocomposite film shows an enhancement of in-plane electrical conductivity over that of a film of octaalkyl substituted metal-free phthalocyanine alone by nearly 65%. This observation is consistent with the formation of charge complex compound as indicated by Raman and XPS data. The presence of PbS in the composite was examined on the basis of XRD peak positions which are comparable with those of bulk PbS. A band gap of 2.22 eV was calculated from optical absorption data using Tauc's law, implying quantum confinement. The mono dispersal behaviour of PbS nanoparticles was established from TEM and XRD studies. The hopping conduction mechanism is found to be primarily responsible for charge transport in the hybrid nanocomposite film with the hopping distance larger than PbS diameter.
published_date 2017-02-28T03:39:08Z
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score 11.013148

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