WO3:AgInS2 quantum dot electron transport layers in enhanced perovskite solar cells

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Written By Fluxim AG

Seriwattanachai, C., Kaewprajak, A., Sukgorn, N. et al.

Journal of Materials Research (2023).

https://doi.org/10.1557/s43578-023-00967-1

This study developed dual electron transport layers (TiO2/WO3:AgInS2 QDs) for planar perovskite solar cells, which improved charge extraction and transportation. AgInS2 quantum dots were fabricated with varying sizes, resulting in a redshift in the photoluminescence (PL) peak intensity.

The addition of AgInS2 QDs quenched the PL intensity of the perovskite film. Improved device stability was achieved due to the WO3:AgInS2 QDs layer, which protected the perovskite interface from direct contact with TiO2 and prevented UV decomposition. The TiO2/WO3:AgInS2 QDs electron transport layers enhanced the performance and long-term stability of perovskite solar cells.

The electrochemical impedance spectroscopy (EIS), intensity modulated photovoltage spectroscopy (IMVS) and intensity modulate photocurrent spectroscopy (IMPS) were measured by PAIOS.

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