Optical absorption enhancement in sensitized ZnO nanorods for solar cells
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Matéria (Rio de Janeiro. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762015000300747 |
Resumo: | ABSTRACTThe Optical Properties of ZnO Nanorods (NR) sensitized with different semiconductors in Core-Shell nanostructures were studied, comparing them with those of bare ZnO NR. Experimental measurements of Transmittance and Diffuse Reflectance show an increased light absorption at the solar spectrum and the appearances of new absorption edges (AE). The measurements are compared with numerical simulations based on Bruggeman Effective Medium Approximation. An increased absorption with the sensitizer content is observed. For similar changes in filling fractions, CdTe presents higher changes in absorption than CdS. Shifts in the AE are observed experimentally (e.g. between 2.34 eV and 2.66 eV for CdS). These shifts cannot be assigned to sensitizer content or confinement effects. A similar behaviour is observed for CdTe in which the AE measured by transmittance is between 1.31 eV and 1.36 eV, while the one obtained from Kubelka-Munk analysis of reflectance is, for the same samples, 1.57 eV and 1.49 eV, respectively. Moreover, the split-off AE is also observed at 2.55 eV and 2.28 eV. The observed large red-shifts could be associated with an enhancement of the subbandgap absorption due to an increase in the light free path at the core-shell nanostructure. |
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Optical absorption enhancement in sensitized ZnO nanorods for solar cellsNanostructuresZnONanowiresSolar CellsABSTRACTThe Optical Properties of ZnO Nanorods (NR) sensitized with different semiconductors in Core-Shell nanostructures were studied, comparing them with those of bare ZnO NR. Experimental measurements of Transmittance and Diffuse Reflectance show an increased light absorption at the solar spectrum and the appearances of new absorption edges (AE). The measurements are compared with numerical simulations based on Bruggeman Effective Medium Approximation. An increased absorption with the sensitizer content is observed. For similar changes in filling fractions, CdTe presents higher changes in absorption than CdS. Shifts in the AE are observed experimentally (e.g. between 2.34 eV and 2.66 eV for CdS). These shifts cannot be assigned to sensitizer content or confinement effects. A similar behaviour is observed for CdTe in which the AE measured by transmittance is between 1.31 eV and 1.36 eV, while the one obtained from Kubelka-Munk analysis of reflectance is, for the same samples, 1.57 eV and 1.49 eV, respectively. Moreover, the split-off AE is also observed at 2.55 eV and 2.28 eV. The observed large red-shifts could be associated with an enhancement of the subbandgap absorption due to an increase in the light free path at the core-shell nanostructure.Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiroem cooperação com a Associação Brasileira do Hidrogênio, ABH22015-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762015000300747Matéria (Rio de Janeiro) v.20 n.3 2015reponame:Matéria (Rio de Janeiro. Online)instname:Matéria (Rio de Janeiro. Online)instacron:RLAM10.1590/S1517-707620150003.0079info:eu-repo/semantics/openAccessPereyra,Carlos JavierFerrer,FlorenciaGómez,CarmelaCampo,LucíaMarotti,Ricardo EnriqueMartin,FranciscoLeinen,DietmarRamos-Barrado,JoséDalchiele,Enrique Arieleng2015-10-21T00:00:00Zoai:scielo:S1517-70762015000300747Revistahttp://www.materia.coppe.ufrj.br/https://old.scielo.br/oai/scielo-oai.php||materia@labh2.coppe.ufrj.br1517-70761517-7076opendoar:2015-10-21T00:00Matéria (Rio de Janeiro. Online) - Matéria (Rio de Janeiro. Online)false |
dc.title.none.fl_str_mv |
Optical absorption enhancement in sensitized ZnO nanorods for solar cells |
title |
Optical absorption enhancement in sensitized ZnO nanorods for solar cells |
spellingShingle |
Optical absorption enhancement in sensitized ZnO nanorods for solar cells Pereyra,Carlos Javier Nanostructures ZnO Nanowires Solar Cells |
title_short |
Optical absorption enhancement in sensitized ZnO nanorods for solar cells |
title_full |
Optical absorption enhancement in sensitized ZnO nanorods for solar cells |
title_fullStr |
Optical absorption enhancement in sensitized ZnO nanorods for solar cells |
title_full_unstemmed |
Optical absorption enhancement in sensitized ZnO nanorods for solar cells |
title_sort |
Optical absorption enhancement in sensitized ZnO nanorods for solar cells |
author |
Pereyra,Carlos Javier |
author_facet |
Pereyra,Carlos Javier Ferrer,Florencia Gómez,Carmela Campo,Lucía Marotti,Ricardo Enrique Martin,Francisco Leinen,Dietmar Ramos-Barrado,José Dalchiele,Enrique Ariel |
author_role |
author |
author2 |
Ferrer,Florencia Gómez,Carmela Campo,Lucía Marotti,Ricardo Enrique Martin,Francisco Leinen,Dietmar Ramos-Barrado,José Dalchiele,Enrique Ariel |
author2_role |
author author author author author author author author |
dc.contributor.author.fl_str_mv |
Pereyra,Carlos Javier Ferrer,Florencia Gómez,Carmela Campo,Lucía Marotti,Ricardo Enrique Martin,Francisco Leinen,Dietmar Ramos-Barrado,José Dalchiele,Enrique Ariel |
dc.subject.por.fl_str_mv |
Nanostructures ZnO Nanowires Solar Cells |
topic |
Nanostructures ZnO Nanowires Solar Cells |
description |
ABSTRACTThe Optical Properties of ZnO Nanorods (NR) sensitized with different semiconductors in Core-Shell nanostructures were studied, comparing them with those of bare ZnO NR. Experimental measurements of Transmittance and Diffuse Reflectance show an increased light absorption at the solar spectrum and the appearances of new absorption edges (AE). The measurements are compared with numerical simulations based on Bruggeman Effective Medium Approximation. An increased absorption with the sensitizer content is observed. For similar changes in filling fractions, CdTe presents higher changes in absorption than CdS. Shifts in the AE are observed experimentally (e.g. between 2.34 eV and 2.66 eV for CdS). These shifts cannot be assigned to sensitizer content or confinement effects. A similar behaviour is observed for CdTe in which the AE measured by transmittance is between 1.31 eV and 1.36 eV, while the one obtained from Kubelka-Munk analysis of reflectance is, for the same samples, 1.57 eV and 1.49 eV, respectively. Moreover, the split-off AE is also observed at 2.55 eV and 2.28 eV. The observed large red-shifts could be associated with an enhancement of the subbandgap absorption due to an increase in the light free path at the core-shell nanostructure. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-09-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762015000300747 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762015000300747 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1517-707620150003.0079 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro em cooperação com a Associação Brasileira do Hidrogênio, ABH2 |
publisher.none.fl_str_mv |
Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro em cooperação com a Associação Brasileira do Hidrogênio, ABH2 |
dc.source.none.fl_str_mv |
Matéria (Rio de Janeiro) v.20 n.3 2015 reponame:Matéria (Rio de Janeiro. Online) instname:Matéria (Rio de Janeiro. Online) instacron:RLAM |
instname_str |
Matéria (Rio de Janeiro. Online) |
instacron_str |
RLAM |
institution |
RLAM |
reponame_str |
Matéria (Rio de Janeiro. Online) |
collection |
Matéria (Rio de Janeiro. Online) |
repository.name.fl_str_mv |
Matéria (Rio de Janeiro. Online) - Matéria (Rio de Janeiro. Online) |
repository.mail.fl_str_mv |
||materia@labh2.coppe.ufrj.br |
_version_ |
1752126688861356032 |