Effect of Lead-Free Perovskite Cs2SnI6 Addition in the Structure of Dye-Sensitized Solar Cell

Herlin Pujiarti; Rahmat Hidayat; Priastuti Wulandari

doi:10.4028/www.scientific.net/KEM.860.22

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 860Effect of Lead-Free Perovskite Cs2SnI6 Addition in...

Effect of Lead-Free Perovskite Cs₂SnI₆ Addition in the Structure of Dye-Sensitized Solar Cell

Abstract:

Over the past few years, metal halide perovskites have been considered as a promising material for application in photovoltaic devices because of its unique optical and electrical properties. In particular, Sn-based perovskites have been being considered to replace Pb-based perovskite because of the Pb toxicity that will raise serious concerns on the environmental issue. In this report, we present our attempt to synthesize the Sn-based perovskite (namely, Cs₂SnI₆), which is air and thermal stable, and use it as an electron transport layer in dye-sensitized solar cells (DSSC) for improving its power conversion efficiency. The synthesize of Cs₂SnI₆ perovskite was done by mixing Cs₂CO₃in HI and SnI₄ in ethanol to form a precipitate at room temperature. The purification process was an important part to collect effectively the synthesis product. The fabrication of DSSC was done by a standard process based on the screen printing and spin-coating techniques, while the characterization of Cs₂SnI₆ was done by UV-Vis spectroscopy and XRD measurement. In the present experiment, the addition of the Cs₂SnI₆ layer was performed by spin coating the Cs₂SnI₆ solution onto the TiO₂ mesoporous layer. The photovoltaic performance of the fabricated DSSC shows a significant enhancement in the short circuit photocurrent density (J_sc) and conversion efficiency, that is, from 15.04 mA/cm² to 16.33 mA/cm² from 5.7% to 6.75% due to the incorporation of spin-coated 5 mM Cs₂SnI₆ in comparison to the reference cell without Cs₂SnI₆.

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Physics Symposium: Key Research in Materials Science

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Key Engineering Materials (Volume 860)

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22-27

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https://doi.org/10.4028/www.scientific.net/KEM.860.22

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August 2020

Authors:

Herlin Pujiarti, Rahmat Hidayat, Priastuti Wulandari*

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Cs₂SnI₆ Perovskite, Dye-Sensitized Solar Cell (DSSC), Impedance Characteristics, Photovoltaic Performance, UV Vis Spectra

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