Conjunction of macroporosity and NH4F treatment for improved performance of TiO2 photoanode in quantum-dot sensitized solar cells

Macropores (MPs) are generally used to enhance the scattering of light inside mesoporous TiO 2 photoanodes used for dye sensitized solar cells (DSSCs) as well as quantum-dot sensitized solar cells (QDSSCs). Despite of an increase in the scattering characteristics of TiO 2 photoanode, the incorporati...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2019-01, Vol.30 (2), p.1861-1869
Main Authors: Basit, Muhammad Abdul, Butt, Muhammad Muteeb, Nazir, Madiha, Ashiq, Muhammad Naeem
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Dye-sensitized solar cells
Dyes
Energy conversion efficiency
Macroporosity
Materials Science
Optical and Electronic Materials
Photoanodes
Photoelectric effect
Photoelectric emission
Photovoltaic cells
Quantum dots
Scattering
Titanium dioxide
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Summary:Macropores (MPs) are generally used to enhance the scattering of light inside mesoporous TiO 2 photoanodes used for dye sensitized solar cells (DSSCs) as well as quantum-dot sensitized solar cells (QDSSCs). Despite of an increase in the scattering characteristics of TiO 2 photoanode, the incorporation of MPs beyond an optimum level results a decrease in the performance of DSSCs or QDSSCs which is credited to lowering of dye or QD loading inside TiO 2 photoanode. In this attempt, we have concurrently employed the scattering proficiency of higher incorporation of MPs ( ~ 30 wt%) and an apposite NH 4 F-treatment assuring a significant increase in QD loading, resulting in a notable improvement in photovoltaic performance of PbS-based QDSSCs. Nearly 18% increase in power conversion efficiency of QDSSCs was obtained which was attributed to increase in photocurrent density ( J SC ) from 13.04 to 15.18 mA/cm 2 .
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-018-0458-2