Enhancing Loading Amount and Performance of Quantu
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Posted On: 01/03/2019 10:01:43 AM
Enhancing Loading Amount and Performance of Quantum Dot Sensitized Solar Cells Based on Direct Adsorption of Quantum Dots from Bi-Component Solvents
Wenran Wang, Huashang Rao, Wenjuan Fang, Hua Zhang, Mengsi Zhou, Zhenxiao Pan, and Xinhua Zhong
J. Phys. Chem. Lett., Just Accepted Manuscript
DOI: 10.1021/acs.jpclett.8b03713
Publication Date (Web): January 2, 2019
Copyright © 2019 American Chemical Society
Cite this:J. Phys. Chem. Lett. XXXX, XXX, XXX-XXX
Abstract
Intrinsically weak interaction between oil-soluble QDs and TiO2 in direct adsorption process limits QD loading and the performance of quantum dot sensitized solar cells (QDSCs). Herein, underlying chemistry and mechanisms governing QD adsorption on TiO2 were studied in order to improve QD loading and cell performance. Experimental results indicate that solvent polarity plays the crucial role in determining QD loading. Compared with single-component solvents, substantially greater QD loading can be realized at critical point (CP) of bi-component solvents, where QDs become metastable and start to precipitate. Through this strategy, average efficiency of 12.24 % was obtained for ZCISe QDSCs, which is comparable to those based on capping ligand induced self-assembly route. This report demonstrates the great potential of bi-component solvents at CP for high QD loading and excellent cell performance, as well as a platform for assembling functional composites with use of different nanocrystals and substrates.
https://pubs.acs.org/doi/10.1021/acs.jpclett.8b03713
Wenran Wang, Huashang Rao, Wenjuan Fang, Hua Zhang, Mengsi Zhou, Zhenxiao Pan, and Xinhua Zhong
J. Phys. Chem. Lett., Just Accepted Manuscript
DOI: 10.1021/acs.jpclett.8b03713
Publication Date (Web): January 2, 2019
Copyright © 2019 American Chemical Society
Cite this:J. Phys. Chem. Lett. XXXX, XXX, XXX-XXX
Abstract
Intrinsically weak interaction between oil-soluble QDs and TiO2 in direct adsorption process limits QD loading and the performance of quantum dot sensitized solar cells (QDSCs). Herein, underlying chemistry and mechanisms governing QD adsorption on TiO2 were studied in order to improve QD loading and cell performance. Experimental results indicate that solvent polarity plays the crucial role in determining QD loading. Compared with single-component solvents, substantially greater QD loading can be realized at critical point (CP) of bi-component solvents, where QDs become metastable and start to precipitate. Through this strategy, average efficiency of 12.24 % was obtained for ZCISe QDSCs, which is comparable to those based on capping ligand induced self-assembly route. This report demonstrates the great potential of bi-component solvents at CP for high QD loading and excellent cell performance, as well as a platform for assembling functional composites with use of different nanocrystals and substrates.
https://pubs.acs.org/doi/10.1021/acs.jpclett.8b03713
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