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Issue 48, 2016
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Ytterbium–erbium ion doped strontium molybdate (SrMoO4): synthesis, characterization, photophysical properties and application in solar cells

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Abstract

In this work, ytterbium–erbium co-doped strontium molybdate (SrMoO4, SMO) nanophosphors (NPs), denoted as SMO:Yb/Er, have been successfully prepared. These NPs were then incorporated into TiO2 acceptor films in hybrid solar cells to enhance light harvesting by virtue of an up-conversion process where low energy photons can be converted into high energy photons through multi-photon processes. The results showed that the SMO:Yb/Er single crystal NPs are capable of turning near infrared photons into visible ones that can be easily captured by poly(thieno[3,4-b]-thiophene/benzodithiophene) (PTB7). The results indicate that the electron transfer rate at the PTB7/TiO2 donor/acceptor interface has been boosted sharply from 0.59 to 1.35 × 109 s−1. Consequently, a hybrid solar cell based on SMO:Yb/Er NP-doped TiO2/PTB7 delivers a high power conversion efficiency of up to 3.61%, thus leading to an efficiency enhancement of around 28% as compared to that of the neat PTB7/TiO2 counterpart (2.81%). This work demonstrates a promising approach to engineering efficient photovoltaic devices by taking advantage of the versatility of rare-earth ion doped oxides that function by modifying light in the solar spectrum.

Graphical abstract: Ytterbium–erbium ion doped strontium molybdate (SrMoO4): synthesis, characterization, photophysical properties and application in solar cells

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Article information


Submitted
24 Sep 2016
Accepted
10 Nov 2016
First published
10 Nov 2016

Phys. Chem. Chem. Phys., 2016,18, 33320-33328
Article type
Paper

Ytterbium–erbium ion doped strontium molybdate (SrMoO4): synthesis, characterization, photophysical properties and application in solar cells

W. Sun, Z. Chen, J. Zhou, D. Li, Z. Huang, X. Jin, Q. Zhang, F. Li and Q. Li, Phys. Chem. Chem. Phys., 2016, 18, 33320
DOI: 10.1039/C6CP06571F

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