CdSe@CdS core-shell quantum dot-polymer multilayer sensitized TiO 2 for photovoltaics

Yan Cui; Hongyue Chen; Min Zheng; Zhifei Dai; Shaoqin Liu

doi:10.1166/jnn.2011.3876

CdSe@CdS core-shell quantum dot-polymer multilayer sensitized TiO ₂ for photovoltaics

Yan Cui
, Hongyue Chen
, Min Zheng
, Zhifei Dai
, Shaoqin Liu^*

^*Corresponding author for this work

Faculty of Life Sciences and Medicine

Harbin Institute of Technology

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

14 Scopus citations

Abstract

Colloidal CdSe@CdS core-shell quantum dots (QDs) have been prepared and exploited as inorganic dyes to sensitize a large-band-gap TiO ₂ layer for QD-sensitized solar cells. The sensitized films were prepared by alternating the layer-by-layer deposition of water-soluble semiconductor QDs and polycations over mesoscopic TiO ₂ films. The multilayer build-up, monitored by UV-vis spectroscopy shows an increase in the film absorbance with the number of adsorbed CdSe@CdS layers. The photoluminescence (PL) and photoelectrochemical properties of the multilayers were investigated. The photovoltaic performance of QD-sensitized solar cells is strongly dependent on the film structure and component. The incorporation of the electron mediators of [Co(Phen) ₃] ²⁺ during the deposition process remarkably enhanced the photocurrent intensity in comparison to that in case of QD/polyelectrolyte multilayers.

Original language	English
Pages (from-to)	3851-3860
Number of pages	10
Journal	Journal of Nanoscience and Nanotechnology
Volume	11
Issue number	5
DOIs	https://doi.org/10.1166/jnn.2011.3876
State	Published - May 2011

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

CdSe@CdS core-shell quantum dots
Layer-by-layer deposition
QD-sensitized solar cells
TiO films

Access to Document

10.1166/jnn.2011.3876

Cite this

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title = "CdSe@CdS core-shell quantum dot-polymer multilayer sensitized TiO 2 for photovoltaics",

abstract = "Colloidal CdSe@CdS core-shell quantum dots (QDs) have been prepared and exploited as inorganic dyes to sensitize a large-band-gap TiO 2 layer for QD-sensitized solar cells. The sensitized films were prepared by alternating the layer-by-layer deposition of water-soluble semiconductor QDs and polycations over mesoscopic TiO 2 films. The multilayer build-up, monitored by UV-vis spectroscopy shows an increase in the film absorbance with the number of adsorbed CdSe@CdS layers. The photoluminescence (PL) and photoelectrochemical properties of the multilayers were investigated. The photovoltaic performance of QD-sensitized solar cells is strongly dependent on the film structure and component. The incorporation of the electron mediators of [Co(Phen) 3] 2+ during the deposition process remarkably enhanced the photocurrent intensity in comparison to that in case of QD/polyelectrolyte multilayers.",

keywords = "CdSe@CdS core-shell quantum dots, Layer-by-layer deposition, QD-sensitized solar cells, TiO films",

author = "Yan Cui and Hongyue Chen and Min Zheng and Zhifei Dai and Shaoqin Liu",

year = "2011",

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doi = "10.1166/jnn.2011.3876",

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AU - Cui, Yan

AU - Chen, Hongyue

AU - Zheng, Min

AU - Dai, Zhifei

AU - Liu, Shaoqin

PY - 2011/5

Y1 - 2011/5

N2 - Colloidal CdSe@CdS core-shell quantum dots (QDs) have been prepared and exploited as inorganic dyes to sensitize a large-band-gap TiO 2 layer for QD-sensitized solar cells. The sensitized films were prepared by alternating the layer-by-layer deposition of water-soluble semiconductor QDs and polycations over mesoscopic TiO 2 films. The multilayer build-up, monitored by UV-vis spectroscopy shows an increase in the film absorbance with the number of adsorbed CdSe@CdS layers. The photoluminescence (PL) and photoelectrochemical properties of the multilayers were investigated. The photovoltaic performance of QD-sensitized solar cells is strongly dependent on the film structure and component. The incorporation of the electron mediators of [Co(Phen) 3] 2+ during the deposition process remarkably enhanced the photocurrent intensity in comparison to that in case of QD/polyelectrolyte multilayers.

AB - Colloidal CdSe@CdS core-shell quantum dots (QDs) have been prepared and exploited as inorganic dyes to sensitize a large-band-gap TiO 2 layer for QD-sensitized solar cells. The sensitized films were prepared by alternating the layer-by-layer deposition of water-soluble semiconductor QDs and polycations over mesoscopic TiO 2 films. The multilayer build-up, monitored by UV-vis spectroscopy shows an increase in the film absorbance with the number of adsorbed CdSe@CdS layers. The photoluminescence (PL) and photoelectrochemical properties of the multilayers were investigated. The photovoltaic performance of QD-sensitized solar cells is strongly dependent on the film structure and component. The incorporation of the electron mediators of [Co(Phen) 3] 2+ during the deposition process remarkably enhanced the photocurrent intensity in comparison to that in case of QD/polyelectrolyte multilayers.

KW - CdSe@CdS core-shell quantum dots

KW - Layer-by-layer deposition

KW - QD-sensitized solar cells

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