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Issue 21, 2013
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Long afterglow SrAl2O4:Eu,Dy phosphors for CdS quantum dot-sensitized solar cells with enhanced photovoltaic performance

Hengchao Sun,a  Likun Pan,*a  Xianqing Piaoa  and  Zhuo Suna 
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* Corresponding authors

a Engineering Research Center for Nanophotonics & Advanced Instrument, Ministry of Education, Department of Physics, East China Normal University, Shanghai, China
E-mail: lkpan@phy.ecnu.edu.cn
Fax: +86 21 62234321
Tel: +86 21 62234132

Abstract

An efficient bifunctional structured layer composed of long afterglow SrAl2O4:Eu,Dy phosphors on top of a transparent layer of nanocrystalline TiO2 was fabricated for use in CdS quantum dot-sensitized solar cells (QDSSCs). The introduction of SrAl2O4:Eu,Dy increases the photocurrent of the QDSSCs mainly due to enhanced light harvesting abilities via improved light absorption and scattering. Under one sun illumination (AM 1.5G, 100 mW cm−2), cells containing SrAl2O4:Eu,Dy show a marked improvement in their conversion efficiency (1.24%) compared with cells without SrAl2O4:Eu,Dy (0.98%). After one sun illumination for 1 min, after which the light source was turned off, cells containing SrAl2O4:Eu,Dy show an efficiency of 0.07% under dark conditions due to the irradiation by the long persistent light from SrAl2O4:Eu,Dy. The present strategy should provide a possibility to fulfil the operation of solar cells even in the dark.

Graphical abstract: Long afterglow SrAl2O4:Eu,Dy phosphors for CdS quantum dot-sensitized solar cells with enhanced photovoltaic performance

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Publication details

The article was received on 07 Feb 2013, accepted on 19 Mar 2013 and first published on 20 Mar 2013


Article type: Paper
DOI: 10.1039/C3TA10596B
Citation: J. Mater. Chem. A, 2013,1, 6388-6392
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    Long afterglow SrAl2O4:Eu,Dy phosphors for CdS quantum dot-sensitized solar cells with enhanced photovoltaic performance

    H. Sun, L. Pan, X. Piao and Z. Sun, J. Mater. Chem. A, 2013, 1, 6388
    DOI: 10.1039/C3TA10596B

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