Controllable photoluminescence enhancement of CdTe/CdS quantum dots thin films incorporation with Au nanoparticles

Au nanoparticles (Au NPs)/CdTe/CdS QDs nanocomposite films were fabricated by deposition of Au NPs and layer-by-layer self-assembly of colloidal CdTe/CdS QDs. Photoluminescence (PL) spectra showed that Au NPs incorporation resulted in an increase of PL intensity about 16-fold compared with that of t...

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Autores principales: Wang, Hongyu, Xu, Ling, Zhang, Renqi, Ge, Zhaoyun, Zhang, Wenping, Xu, Jun, Ma, Zhongyuan, Chen, Kunji
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer US 2015
Materias:
Nano Express
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4398686/
https://www.ncbi.nlm.nih.gov/pubmed/25897301
http://dx.doi.org/10.1186/s11671-015-0833-3
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author Wang, Hongyu
Xu, Ling
Zhang, Renqi
Ge, Zhaoyun
Zhang, Wenping
Xu, Jun
Ma, Zhongyuan
Chen, Kunji
author_facet Wang, Hongyu
Xu, Ling
Zhang, Renqi
Ge, Zhaoyun
Zhang, Wenping
Xu, Jun
Ma, Zhongyuan
Chen, Kunji
author_sort Wang, Hongyu
collection PubMed
description Au nanoparticles (Au NPs)/CdTe/CdS QDs nanocomposite films were fabricated by deposition of Au NPs and layer-by-layer self-assembly of colloidal CdTe/CdS QDs. Photoluminescence (PL) spectra showed that Au NPs incorporation resulted in an increase of PL intensity about 16-fold compared with that of the samples without Au NPs. PL enhancement of Au NPs/CdTe/CdS QDs nanocomposite films can be controlled by tuning the thickness of spacer layer between the metal nanoparticles (MNPs) and QDs. Optical absorption spectra exhibited the incorporation of Au NPs boosted the absorption of Au NPs/CdTe/CdS QDs nanocomposite films. The results of finite-difference time-domain (FDTD) simulation indicated that the increased sizes of Au NPs resulted in stronger localization of electric field, which boosted the PL intensity of QDs in the vicinity of Au NPs. We thought that these were mainly attributed to localized SP enhancement effects of the Au NPs. Our experiment results demonstrated that Au NPs/QDs nanocomposite films would be a promising candidate for optoelectronic devices application. PACS 78.55.-m; 82.33.Ln; 68.65.Hb
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spelling pubmed-43986862015-04-20 Controllable photoluminescence enhancement of CdTe/CdS quantum dots thin films incorporation with Au nanoparticles Wang, Hongyu Xu, Ling Zhang, Renqi Ge, Zhaoyun Zhang, Wenping Xu, Jun Ma, Zhongyuan Chen, Kunji Nanoscale Res Lett Nano Express Au nanoparticles (Au NPs)/CdTe/CdS QDs nanocomposite films were fabricated by deposition of Au NPs and layer-by-layer self-assembly of colloidal CdTe/CdS QDs. Photoluminescence (PL) spectra showed that Au NPs incorporation resulted in an increase of PL intensity about 16-fold compared with that of the samples without Au NPs. PL enhancement of Au NPs/CdTe/CdS QDs nanocomposite films can be controlled by tuning the thickness of spacer layer between the metal nanoparticles (MNPs) and QDs. Optical absorption spectra exhibited the incorporation of Au NPs boosted the absorption of Au NPs/CdTe/CdS QDs nanocomposite films. The results of finite-difference time-domain (FDTD) simulation indicated that the increased sizes of Au NPs resulted in stronger localization of electric field, which boosted the PL intensity of QDs in the vicinity of Au NPs. We thought that these were mainly attributed to localized SP enhancement effects of the Au NPs. Our experiment results demonstrated that Au NPs/QDs nanocomposite films would be a promising candidate for optoelectronic devices application. PACS 78.55.-m; 82.33.Ln; 68.65.Hb Springer US 2015-03-12 /pmc/articles/PMC4398686/ /pubmed/25897301 http://dx.doi.org/10.1186/s11671-015-0833-3 Text en © Wang et al. ; licensee Springer. 2015 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.
spellingShingle Nano Express
Wang, Hongyu
Xu, Ling
Zhang, Renqi
Ge, Zhaoyun
Zhang, Wenping
Xu, Jun
Ma, Zhongyuan
Chen, Kunji
Controllable photoluminescence enhancement of CdTe/CdS quantum dots thin films incorporation with Au nanoparticles
title Controllable photoluminescence enhancement of CdTe/CdS quantum dots thin films incorporation with Au nanoparticles
title_full Controllable photoluminescence enhancement of CdTe/CdS quantum dots thin films incorporation with Au nanoparticles
title_fullStr Controllable photoluminescence enhancement of CdTe/CdS quantum dots thin films incorporation with Au nanoparticles
title_full_unstemmed Controllable photoluminescence enhancement of CdTe/CdS quantum dots thin films incorporation with Au nanoparticles
title_short Controllable photoluminescence enhancement of CdTe/CdS quantum dots thin films incorporation with Au nanoparticles
title_sort controllable photoluminescence enhancement of cdte/cds quantum dots thin films incorporation with au nanoparticles
topic Nano Express
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4398686/
https://www.ncbi.nlm.nih.gov/pubmed/25897301
http://dx.doi.org/10.1186/s11671-015-0833-3
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