Photovoltage Improvement for Dye-sensitized Solar Cells via Interhalogen Redox Mediators

In this study, we found that the open-circuit voltage (Voc) of dye-sensitized solar cells was improved by using interhalogen ions (XY2−; X, Y = I or Br) synthesized by mixing iodide and bromide redox couples. I− ions are important for obtaining a higher short-circuit current (Jsc) in the bromine-bas...

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Bibliographic Details
Published in:Denki kagaku oyobi kōgyō butsuri kagaku 2023/08/10, Vol.91(8), pp.087001-087001
Main Authors: AWAI, Fumiyasu, ARAI, Yonbon, KINOSHITA, Takumi, NAKAZAKI, Jotaro, UCHIDA, Satoshi, SEGAWA, Hiroshi
Format: Article
Language:eng ; jpn
Subjects:
Bromine
Charge transfer
Dye-sensitized Solar Cells
Dyes
Electrochemical impedance spectroscopy
Electrochemistry
Electrolytic cells
Interhalogen Compounds
Iodides
Ions
Open circuit voltage
Redox Mediators
Redox properties
Short circuit currents
Short-circuit current
Solar cells
Spectroscopy
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Summary:In this study, we found that the open-circuit voltage (Voc) of dye-sensitized solar cells was improved by using interhalogen ions (XY2−; X, Y = I or Br) synthesized by mixing iodide and bromide redox couples. I− ions are important for obtaining a higher short-circuit current (Jsc) in the bromine-based electrolyte. The charge transfer and diffusion resistances were determined by electrochemical impedance spectroscopy. The interhalogen redox mediators improved the photoenergy conversion efficiency (PCE) and achieved a high Voc of 0.91 V.
ISSN:1344-3542
2186-2451
DOI:10.5796/electrochemistry.23-00055