Potential-reversal electrodeposited MoS2 thin film as an efficient electrocatalytic material for bifacial dye-sensitized solar cells

•PR deposition mode was successfully employed to prepare MoS2 CE.•The PR-MoS2 CE was highly transparent.•The DSSC using the PR-MoS2 CE exhibited an impressive PCE of 8.77%.•The PCE of the DSSC still reached up to 4.82% on the rear-side illumination. Seeking inexpensive, cost-effective fabrication, a...

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Bibliographic Details
Published in:Solar energy 2020-08, Vol.206, p.163-170
Main Authors: Chang, Chin-Yu, Anuratha, Krishnan Shanmugam, Lin, Ya-Han, Xiao, Yaoming, Hasin, Panitat, Lin, Jeng-Yu
Format: Article
Language:English
Subjects:
Counter electrode
Dye-sensitized solar cell
Dye-sensitized solar cells
Dyes
Electrocatalysts
Electrochemistry
Fabrication
Glass substrates
Molybdenum
Molybdenum disulfide
MoS2
Photoelectricity
Photovoltaic cells
Pulse-reversal deposition
Solar cells
Solar energy
Thin films
Tin
Tin oxide
Tin oxides
Transparent
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Summary:•PR deposition mode was successfully employed to prepare MoS2 CE.•The PR-MoS2 CE was highly transparent.•The DSSC using the PR-MoS2 CE exhibited an impressive PCE of 8.77%.•The PCE of the DSSC still reached up to 4.82% on the rear-side illumination. Seeking inexpensive, cost-effective fabrication, and highly effective Pt-free counter electrode (CE) electrocatalysts to replace the conventional Pt CE for dye-sensitized solar cells (DSSCs) is of great challenge. Here, molybdenum disulfide (MoS2) thin films were directly electrodeposited on F-doped tin oxide (FTO) glass substrates via facile one-step potentiostatic (PS) and potential-reversal (PR) methods, which were exploited as the CE electrocatalysts for DSSC application. According to series of the electrochemical tests, the MoS2 CE electrodeposited by PR mode (PR-MoS2) had a superior electrocatalytic property for I3– reduction in DSSCs to that by PS mode (PS-MoS2). When PR-MoS2 was employed as a CE in a DSSC, the device achieved a satisfactory photoelectric conversion efficiency (PCE) of 8.77%, which is comparable to that based on the conventional Pt CE (9.01%). Meanwhile, the rear side illumination studies showed that the PCE of the DSSC using PR-MoS2 as a CE reached 4.82% and was equivalent to that using the Pt CE (5.67%), which is attributed to their similar transmittance property. This work provides a novel insight into preparing an electrodeposited PR-MoS2-based CE for bifacial DSSCs application.
ISSN:0038-092X
1471-1257
DOI:10.1016/j.solener.2020.06.001