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Article Dans Une Revue Journal of The Electrochemical Society Année : 2022

Electrodeposition of simonkolleite as a low-temperature route to crystalline ZnO films for dye-sensitized solar cells

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A pulsed electrodeposition procedure has been developed to prepare macroporous films of the semiconducting mineral simonkolleite, Zn$_5$ (OH)$_8$Cl$_2$·H$_2$O, on glass/FTO substrates. The morphology is characterized by the presence of smooth, micron-sized hexagonal platelets, and relatively thick films of 6 μm can be prepared in about 15 min. Simonkolleite can be transformed into crystalline, mesoporous ZnO using a relatively low temperature thermal treatment (250 °C). While the macrostructure of hexagonal platelets is maintained, they become mesoporous due to the removal of water and Cl$^−$-containing reaction products. Dye-sensitized solar cells were fabricated with both simonkolleite and ZnO films, using the recently reported fully organic benzothiadiazole-based photosensitizer MG-207, and an electrolyte solution based on either the I$^−$/I$_3^−$ or the Co(bpy)$_3$$^{2+/3+}$ redox couple. An efficiency of 1.74% has been obtained for ZnO/MG-207/Co(bpy)$_3$$^{2+/3+}$ solar cells, illustrating the promise of crystalline, mesoporous ZnO obtained via a low-temperature simonkolleite route for portable and lightweight devices based on flexible substrates.
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hal-03636172 , version 1 (22-01-2024)

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Esdras Canto-Aguilar, Carlos González-Flores, Diecenia Peralta-Domínguez, José Andres-Castán, Renaud Demadrille, et al.. Electrodeposition of simonkolleite as a low-temperature route to crystalline ZnO films for dye-sensitized solar cells. Journal of The Electrochemical Society, 2022, 169 (4), pp.042504. ⟨10.1149/1945-7111/ac62c8⟩. ⟨hal-03636172⟩
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