Nanoscale photovoltaic characteristics of single quantum dot hybridized with poly(3-hexylthiophene)

Yoon Deok Han; Sumin Jeon; Sun Dal Kim; Ji Hee Kim; Sang Youl Kim; Jeongyong Kim; Kwang Sup Lee; Jinsoo Joo

doi:10.1016/j.orgel.2014.08.028

Nanoscale photovoltaic characteristics of single quantum dot hybridized with poly(3-hexylthiophene)

Yoon Deok Han, Sumin Jeon, Sun Dal Kim, Ji Hee Kim, Sang Youl Kim, Jeongyong Kim, Kwang Sup Lee, Jinsoo Joo

Department of Physics

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Hybrids consisting of CdSe/ZnS quantum dot (QD) as a core and thiol-group functionalized poly(3-hexylthiophene) (P3HT) as a shell were fabricated using the ligand-exchange method. We clearly observed the photovoltaic characteristics of a single QD-P3HT hybrid by using conducting atomic force microscopy. Monochromatic power conversion efficiency drastically increased with an increase in the molecular weight (Mw) of P3HT, suggesting sufficient photoinduced charge transfer between the QD and highly ordered P3HT chains. The nanoscale photoluminescence (PL) intensity for a single QD considerably decreased with increasing Mw of P3HT owing to charge transfer effects. On the basis of time-resolved PL and transient absorption spectra measurements of the QD-P3HT hybrids, we deduced that the exciton lifetimes of the QD were reduced with higher-Mw P3HT hybrids, and photobleaching was observed. The measured nanoscale optical characteristics of the single QD-P3HT hybrids support their distinct photovoltaic behaviors.

Original language	English
Pages (from-to)	2893-2902
Number of pages	10
Journal	Organic Electronics
Volume	15
Issue number	11
DOIs	https://doi.org/10.1016/j.orgel.2014.08.028
Publication status	Published - 2014 Nov 11

Bibliographical note

Funding Information:
This work was supported by a National Research Foundation (NRF) grant funded by the Korean government (MEST) (No. 2012R1A2A2A01045102 ). K.-S. Lee and S.Y. Kim acknowledge funding for this work from the NRF through the Active Polymer Center for Patterned Integration ( ERC R11-2007-050-01002-0 ).

Publisher Copyright:
© 2014 Elsevier B.V. All rights reserved.

Keywords

Hybrid
Photovoltaics
Poly(3-hexylthiophene)
Quantum dot Optoelectronics

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Chemistry(all)
Condensed Matter Physics
Materials Chemistry
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.orgel.2014.08.028

Cite this

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title = "Nanoscale photovoltaic characteristics of single quantum dot hybridized with poly(3-hexylthiophene)",

abstract = "Hybrids consisting of CdSe/ZnS quantum dot (QD) as a core and thiol-group functionalized poly(3-hexylthiophene) (P3HT) as a shell were fabricated using the ligand-exchange method. We clearly observed the photovoltaic characteristics of a single QD-P3HT hybrid by using conducting atomic force microscopy. Monochromatic power conversion efficiency drastically increased with an increase in the molecular weight (Mw) of P3HT, suggesting sufficient photoinduced charge transfer between the QD and highly ordered P3HT chains. The nanoscale photoluminescence (PL) intensity for a single QD considerably decreased with increasing Mw of P3HT owing to charge transfer effects. On the basis of time-resolved PL and transient absorption spectra measurements of the QD-P3HT hybrids, we deduced that the exciton lifetimes of the QD were reduced with higher-Mw P3HT hybrids, and photobleaching was observed. The measured nanoscale optical characteristics of the single QD-P3HT hybrids support their distinct photovoltaic behaviors.",

keywords = "Hybrid, Photovoltaics, Poly(3-hexylthiophene), Quantum dot Optoelectronics",

author = "Han, {Yoon Deok} and Sumin Jeon and Kim, {Sun Dal} and Kim, {Ji Hee} and Kim, {Sang Youl} and Jeongyong Kim and Lee, {Kwang Sup} and Jinsoo Joo",

note = "Funding Information: This work was supported by a National Research Foundation (NRF) grant funded by the Korean government (MEST) (No. 2012R1A2A2A01045102 ). K.-S. Lee and S.Y. Kim acknowledge funding for this work from the NRF through the Active Polymer Center for Patterned Integration ( ERC R11-2007-050-01002-0 ). Publisher Copyright: {\textcopyright} 2014 Elsevier B.V. All rights reserved.",

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AU - Han, Yoon Deok

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AU - Kim, Sun Dal

AU - Kim, Ji Hee

AU - Kim, Sang Youl

AU - Kim, Jeongyong

AU - Lee, Kwang Sup

AU - Joo, Jinsoo

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PY - 2014/11/11

Y1 - 2014/11/11

N2 - Hybrids consisting of CdSe/ZnS quantum dot (QD) as a core and thiol-group functionalized poly(3-hexylthiophene) (P3HT) as a shell were fabricated using the ligand-exchange method. We clearly observed the photovoltaic characteristics of a single QD-P3HT hybrid by using conducting atomic force microscopy. Monochromatic power conversion efficiency drastically increased with an increase in the molecular weight (Mw) of P3HT, suggesting sufficient photoinduced charge transfer between the QD and highly ordered P3HT chains. The nanoscale photoluminescence (PL) intensity for a single QD considerably decreased with increasing Mw of P3HT owing to charge transfer effects. On the basis of time-resolved PL and transient absorption spectra measurements of the QD-P3HT hybrids, we deduced that the exciton lifetimes of the QD were reduced with higher-Mw P3HT hybrids, and photobleaching was observed. The measured nanoscale optical characteristics of the single QD-P3HT hybrids support their distinct photovoltaic behaviors.

AB - Hybrids consisting of CdSe/ZnS quantum dot (QD) as a core and thiol-group functionalized poly(3-hexylthiophene) (P3HT) as a shell were fabricated using the ligand-exchange method. We clearly observed the photovoltaic characteristics of a single QD-P3HT hybrid by using conducting atomic force microscopy. Monochromatic power conversion efficiency drastically increased with an increase in the molecular weight (Mw) of P3HT, suggesting sufficient photoinduced charge transfer between the QD and highly ordered P3HT chains. The nanoscale photoluminescence (PL) intensity for a single QD considerably decreased with increasing Mw of P3HT owing to charge transfer effects. On the basis of time-resolved PL and transient absorption spectra measurements of the QD-P3HT hybrids, we deduced that the exciton lifetimes of the QD were reduced with higher-Mw P3HT hybrids, and photobleaching was observed. The measured nanoscale optical characteristics of the single QD-P3HT hybrids support their distinct photovoltaic behaviors.

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KW - Poly(3-hexylthiophene)

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Nanoscale photovoltaic characteristics of single quantum dot hybridized with poly(3-hexylthiophene)

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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