3-Mercaptopropionic, 4-mercaptobenzoic, and oleic acid-capped CdSe quantum dots : interparticle distance, anchoring groups, and surface passivation
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/196802 |
Resumo: | The optoelectronic properties of quantum dots are strongly controlled by the chemical nature of their surface-passivating ligands. In this work, we present the synthesis, characterization, and surface modification of CdSe quantum dots (QDs) and their application in solar cells. CdSe QDs were capped in oleic acid (OA), 3-mercaptopropionic acid (MPA), and 4-mercaptobenzoic acid (MBA). The QDs were characterized by transmission electron microscopy (TEM), UV-Vis absorption and emission spectrophotometry, thermogravimetric analyses, and ¹H and ¹³C NMR. From TEM analysis, it has been observed that interparticle distance can be effectively controlled by the presence of different molecular size ligands. From the ¹H and ¹³C NMR, specific types of interactions between the Cd²+ and the ligands have been observed. Although CdSe/OA presented larger interparticle distance as compared to CdSe/MPA and CdSe/MBA, the photocatalytic oxidation of the thiol groups on the surface of the MPA- and MBA-based quantum dots resulted in poor surface stabilization, ultimately resulting in poor power conversion efficiencies which were ca. 70% smaller than that of OA-based solar cell. |
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Santos, José Augusto Lucena dosBaum, FabioKohlrausch, Emerson CristoferTavares, Fabiele ColloviniPretto, TatianeSantos, Francisco Paulo dosFerreira, JacquelineKhan, SherdilSantos, Marcos José Leite2019-07-11T02:35:25Z20191687-4129http://hdl.handle.net/10183/196802001096853The optoelectronic properties of quantum dots are strongly controlled by the chemical nature of their surface-passivating ligands. In this work, we present the synthesis, characterization, and surface modification of CdSe quantum dots (QDs) and their application in solar cells. CdSe QDs were capped in oleic acid (OA), 3-mercaptopropionic acid (MPA), and 4-mercaptobenzoic acid (MBA). The QDs were characterized by transmission electron microscopy (TEM), UV-Vis absorption and emission spectrophotometry, thermogravimetric analyses, and ¹H and ¹³C NMR. From TEM analysis, it has been observed that interparticle distance can be effectively controlled by the presence of different molecular size ligands. From the ¹H and ¹³C NMR, specific types of interactions between the Cd²+ and the ligands have been observed. Although CdSe/OA presented larger interparticle distance as compared to CdSe/MPA and CdSe/MBA, the photocatalytic oxidation of the thiol groups on the surface of the MPA- and MBA-based quantum dots resulted in poor surface stabilization, ultimately resulting in poor power conversion efficiencies which were ca. 70% smaller than that of OA-based solar cell.application/pdfengJournal of nanomaterials. [London]. Vol. 2019 (2019), Article ID 2796746, 9 p.OptoeletrônicaPontos quânticosCélulas solaresNanomateriaisÁcido 3-MercaptopropiônicoAcido benzoico3-Mercaptopropionic, 4-mercaptobenzoic, and oleic acid-capped CdSe quantum dots : interparticle distance, anchoring groups, and surface passivationEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001096853.pdf.txt001096853.pdf.txtExtracted Texttext/plain38283http://www.lume.ufrgs.br/bitstream/10183/196802/2/001096853.pdf.txt44666eca7bedf9231bf4cf462a9ebc08MD52ORIGINAL001096853.pdfTexto completo (inglês)application/pdf4215026http://www.lume.ufrgs.br/bitstream/10183/196802/1/001096853.pdff39336f3983ebfa06dbafbf227576f61MD5110183/1968022024-01-10 04:37:07.989457oai:www.lume.ufrgs.br:10183/196802Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-01-10T06:37:07Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
3-Mercaptopropionic, 4-mercaptobenzoic, and oleic acid-capped CdSe quantum dots : interparticle distance, anchoring groups, and surface passivation |
title |
3-Mercaptopropionic, 4-mercaptobenzoic, and oleic acid-capped CdSe quantum dots : interparticle distance, anchoring groups, and surface passivation |
spellingShingle |
3-Mercaptopropionic, 4-mercaptobenzoic, and oleic acid-capped CdSe quantum dots : interparticle distance, anchoring groups, and surface passivation Santos, José Augusto Lucena dos Optoeletrônica Pontos quânticos Células solares Nanomateriais Ácido 3-Mercaptopropiônico Acido benzoico |
title_short |
3-Mercaptopropionic, 4-mercaptobenzoic, and oleic acid-capped CdSe quantum dots : interparticle distance, anchoring groups, and surface passivation |
title_full |
3-Mercaptopropionic, 4-mercaptobenzoic, and oleic acid-capped CdSe quantum dots : interparticle distance, anchoring groups, and surface passivation |
title_fullStr |
3-Mercaptopropionic, 4-mercaptobenzoic, and oleic acid-capped CdSe quantum dots : interparticle distance, anchoring groups, and surface passivation |
title_full_unstemmed |
3-Mercaptopropionic, 4-mercaptobenzoic, and oleic acid-capped CdSe quantum dots : interparticle distance, anchoring groups, and surface passivation |
title_sort |
3-Mercaptopropionic, 4-mercaptobenzoic, and oleic acid-capped CdSe quantum dots : interparticle distance, anchoring groups, and surface passivation |
author |
Santos, José Augusto Lucena dos |
author_facet |
Santos, José Augusto Lucena dos Baum, Fabio Kohlrausch, Emerson Cristofer Tavares, Fabiele Collovini Pretto, Tatiane Santos, Francisco Paulo dos Ferreira, Jacqueline Khan, Sherdil Santos, Marcos José Leite |
author_role |
author |
author2 |
Baum, Fabio Kohlrausch, Emerson Cristofer Tavares, Fabiele Collovini Pretto, Tatiane Santos, Francisco Paulo dos Ferreira, Jacqueline Khan, Sherdil Santos, Marcos José Leite |
author2_role |
author author author author author author author author |
dc.contributor.author.fl_str_mv |
Santos, José Augusto Lucena dos Baum, Fabio Kohlrausch, Emerson Cristofer Tavares, Fabiele Collovini Pretto, Tatiane Santos, Francisco Paulo dos Ferreira, Jacqueline Khan, Sherdil Santos, Marcos José Leite |
dc.subject.por.fl_str_mv |
Optoeletrônica Pontos quânticos Células solares Nanomateriais Ácido 3-Mercaptopropiônico Acido benzoico |
topic |
Optoeletrônica Pontos quânticos Células solares Nanomateriais Ácido 3-Mercaptopropiônico Acido benzoico |
description |
The optoelectronic properties of quantum dots are strongly controlled by the chemical nature of their surface-passivating ligands. In this work, we present the synthesis, characterization, and surface modification of CdSe quantum dots (QDs) and their application in solar cells. CdSe QDs were capped in oleic acid (OA), 3-mercaptopropionic acid (MPA), and 4-mercaptobenzoic acid (MBA). The QDs were characterized by transmission electron microscopy (TEM), UV-Vis absorption and emission spectrophotometry, thermogravimetric analyses, and ¹H and ¹³C NMR. From TEM analysis, it has been observed that interparticle distance can be effectively controlled by the presence of different molecular size ligands. From the ¹H and ¹³C NMR, specific types of interactions between the Cd²+ and the ligands have been observed. Although CdSe/OA presented larger interparticle distance as compared to CdSe/MPA and CdSe/MBA, the photocatalytic oxidation of the thiol groups on the surface of the MPA- and MBA-based quantum dots resulted in poor surface stabilization, ultimately resulting in poor power conversion efficiencies which were ca. 70% smaller than that of OA-based solar cell. |
publishDate |
2019 |
dc.date.accessioned.fl_str_mv |
2019-07-11T02:35:25Z |
dc.date.issued.fl_str_mv |
2019 |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
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publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/196802 |
dc.identifier.issn.pt_BR.fl_str_mv |
1687-4129 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001096853 |
identifier_str_mv |
1687-4129 001096853 |
url |
http://hdl.handle.net/10183/196802 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Journal of nanomaterials. [London]. Vol. 2019 (2019), Article ID 2796746, 9 p. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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