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Strong Photocurrent from Two-Dimensional Excitons in Solution-Processed Stacked Perovskite Semiconductor Sheets
[Image: see text] Room-temperature photocurrent measurements in two-dimensional (2D) inorganic–organic perovskite devices reveal that excitons strongly contribute to the photocurrents despite possessing binding energies over 10 times larger than the thermal energies. The p-type (C(6)H(9)C(2)H(4)NH(3...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American
Chemical Society
2015
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4666456/ https://www.ncbi.nlm.nih.gov/pubmed/26497547 http://dx.doi.org/10.1021/acsami.5b07026 |
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author | Ahmad, Shahab Kanaujia, Pawan K. Beeson, Harry J. Abate, Antonio Deschler, Felix Credgington, Dan Steiner, Ullrich Prakash, G. Vijaya Baumberg, Jeremy J. |
author_facet | Ahmad, Shahab Kanaujia, Pawan K. Beeson, Harry J. Abate, Antonio Deschler, Felix Credgington, Dan Steiner, Ullrich Prakash, G. Vijaya Baumberg, Jeremy J. |
author_sort | Ahmad, Shahab |
collection | PubMed |
description | [Image: see text] Room-temperature photocurrent measurements in two-dimensional (2D) inorganic–organic perovskite devices reveal that excitons strongly contribute to the photocurrents despite possessing binding energies over 10 times larger than the thermal energies. The p-type (C(6)H(9)C(2)H(4)NH(3))(2)PbI(4) liberates photocarriers at metallic Schottky aluminum contacts, but incorporating electron- and hole-transport layers enhances the extracted photocurrents by 100-fold. A further 10-fold gain is found when TiO(2) nanoparticles are directly integrated into the perovskite layers, although the 2D exciton semiconducting layers are not significantly disrupted. These results show that strong excitonic materials may be useful as photovoltaic materials despite high exciton binding energies and suggest mechanisms to better understand the photovoltaic properties of the related three-dimensional perovskites. |
format | Online Article Text |
id | pubmed-4666456 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | American
Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-46664562015-12-04 Strong Photocurrent from Two-Dimensional Excitons in Solution-Processed Stacked Perovskite Semiconductor Sheets Ahmad, Shahab Kanaujia, Pawan K. Beeson, Harry J. Abate, Antonio Deschler, Felix Credgington, Dan Steiner, Ullrich Prakash, G. Vijaya Baumberg, Jeremy J. ACS Appl Mater Interfaces [Image: see text] Room-temperature photocurrent measurements in two-dimensional (2D) inorganic–organic perovskite devices reveal that excitons strongly contribute to the photocurrents despite possessing binding energies over 10 times larger than the thermal energies. The p-type (C(6)H(9)C(2)H(4)NH(3))(2)PbI(4) liberates photocarriers at metallic Schottky aluminum contacts, but incorporating electron- and hole-transport layers enhances the extracted photocurrents by 100-fold. A further 10-fold gain is found when TiO(2) nanoparticles are directly integrated into the perovskite layers, although the 2D exciton semiconducting layers are not significantly disrupted. These results show that strong excitonic materials may be useful as photovoltaic materials despite high exciton binding energies and suggest mechanisms to better understand the photovoltaic properties of the related three-dimensional perovskites. American Chemical Society 2015-10-26 2015-11-18 /pmc/articles/PMC4666456/ /pubmed/26497547 http://dx.doi.org/10.1021/acsami.5b07026 Text en Copyright © 2015 American Chemical Society This is an open access article published under a Creative Commons Attribution (CC-BY) License (http://pubs.acs.org/page/policy/authorchoice_ccby_termsofuse.html) , which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited. |
spellingShingle | Ahmad, Shahab Kanaujia, Pawan K. Beeson, Harry J. Abate, Antonio Deschler, Felix Credgington, Dan Steiner, Ullrich Prakash, G. Vijaya Baumberg, Jeremy J. Strong Photocurrent from Two-Dimensional Excitons in Solution-Processed Stacked Perovskite Semiconductor Sheets |
title | Strong
Photocurrent from Two-Dimensional Excitons in Solution-Processed Stacked
Perovskite Semiconductor Sheets |
title_full | Strong
Photocurrent from Two-Dimensional Excitons in Solution-Processed Stacked
Perovskite Semiconductor Sheets |
title_fullStr | Strong
Photocurrent from Two-Dimensional Excitons in Solution-Processed Stacked
Perovskite Semiconductor Sheets |
title_full_unstemmed | Strong
Photocurrent from Two-Dimensional Excitons in Solution-Processed Stacked
Perovskite Semiconductor Sheets |
title_short | Strong
Photocurrent from Two-Dimensional Excitons in Solution-Processed Stacked
Perovskite Semiconductor Sheets |
title_sort | strong
photocurrent from two-dimensional excitons in solution-processed stacked
perovskite semiconductor sheets |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4666456/ https://www.ncbi.nlm.nih.gov/pubmed/26497547 http://dx.doi.org/10.1021/acsami.5b07026 |
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