Cargando…

Photoconductivity of PbS/perovskite quantum dots in gold nanogaps

We demonstrate that the photoconductance of colloidal PbS/MAPbI(3) quantum dots in nanoscale gold electrode gaps shows a consistent power law dependence of the photocurrent on the light intensity with an exponent slightly below 0.7. The gap sizes are between 25 and 800 nm and by scanning photocurren...

Descripción completa

Detalles Bibliográficos
Autores principales: Grimaldi, Dario, Kelderer, Emil, Dirin, Dmitry N., Kovalenko, Maksym V., Hohenau, Andreas, Ditlbacher, Harald, Krenn, Joachim R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: RSC 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9400517/
https://www.ncbi.nlm.nih.gov/pubmed/36134347
http://dx.doi.org/10.1039/d2na00284a
_version_ 1784772758002991104
author Grimaldi, Dario
Kelderer, Emil
Dirin, Dmitry N.
Kovalenko, Maksym V.
Hohenau, Andreas
Ditlbacher, Harald
Krenn, Joachim R.
author_facet Grimaldi, Dario
Kelderer, Emil
Dirin, Dmitry N.
Kovalenko, Maksym V.
Hohenau, Andreas
Ditlbacher, Harald
Krenn, Joachim R.
author_sort Grimaldi, Dario
collection PubMed
description We demonstrate that the photoconductance of colloidal PbS/MAPbI(3) quantum dots in nanoscale gold electrode gaps shows a consistent power law dependence of the photocurrent on the light intensity with an exponent slightly below 0.7. The gap sizes are between 25 and 800 nm and by scanning photocurrent microscopy we evidence the strong localization and high reproducibility of photocurrent generation. We probe different flat-faced and pointed electrodes for excitation light in the red and near infrared spectral range and laser irradiances from 10(−2) to 10(2) W cm(−2). Our material combination provides practically identical photocurrent response for a wide range of gap sizes and geometries, highlighting its generic potential for nanoscale light coupling and detection.
format Online
Article
Text
id pubmed-9400517
institution National Center for Biotechnology Information
language English
publishDate 2022
publisher RSC
record_format MEDLINE/PubMed
spelling pubmed-94005172022-09-20 Photoconductivity of PbS/perovskite quantum dots in gold nanogaps Grimaldi, Dario Kelderer, Emil Dirin, Dmitry N. Kovalenko, Maksym V. Hohenau, Andreas Ditlbacher, Harald Krenn, Joachim R. Nanoscale Adv Chemistry We demonstrate that the photoconductance of colloidal PbS/MAPbI(3) quantum dots in nanoscale gold electrode gaps shows a consistent power law dependence of the photocurrent on the light intensity with an exponent slightly below 0.7. The gap sizes are between 25 and 800 nm and by scanning photocurrent microscopy we evidence the strong localization and high reproducibility of photocurrent generation. We probe different flat-faced and pointed electrodes for excitation light in the red and near infrared spectral range and laser irradiances from 10(−2) to 10(2) W cm(−2). Our material combination provides practically identical photocurrent response for a wide range of gap sizes and geometries, highlighting its generic potential for nanoscale light coupling and detection. RSC 2022-07-18 /pmc/articles/PMC9400517/ /pubmed/36134347 http://dx.doi.org/10.1039/d2na00284a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Grimaldi, Dario
Kelderer, Emil
Dirin, Dmitry N.
Kovalenko, Maksym V.
Hohenau, Andreas
Ditlbacher, Harald
Krenn, Joachim R.
Photoconductivity of PbS/perovskite quantum dots in gold nanogaps
title Photoconductivity of PbS/perovskite quantum dots in gold nanogaps
title_full Photoconductivity of PbS/perovskite quantum dots in gold nanogaps
title_fullStr Photoconductivity of PbS/perovskite quantum dots in gold nanogaps
title_full_unstemmed Photoconductivity of PbS/perovskite quantum dots in gold nanogaps
title_short Photoconductivity of PbS/perovskite quantum dots in gold nanogaps
title_sort photoconductivity of pbs/perovskite quantum dots in gold nanogaps
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9400517/
https://www.ncbi.nlm.nih.gov/pubmed/36134347
http://dx.doi.org/10.1039/d2na00284a
work_keys_str_mv AT grimaldidario photoconductivityofpbsperovskitequantumdotsingoldnanogaps
AT keldereremil photoconductivityofpbsperovskitequantumdotsingoldnanogaps
AT dirindmitryn photoconductivityofpbsperovskitequantumdotsingoldnanogaps
AT kovalenkomaksymv photoconductivityofpbsperovskitequantumdotsingoldnanogaps
AT hohenauandreas photoconductivityofpbsperovskitequantumdotsingoldnanogaps
AT ditlbacherharald photoconductivityofpbsperovskitequantumdotsingoldnanogaps
AT krennjoachimr photoconductivityofpbsperovskitequantumdotsingoldnanogaps