Enhanced photovoltaic performance of SmMoSe2 electron transport layer for perovskite solar cells

What is it about?

Electron transport layers (ETLs) are crucial components in perovskite solar cells (PSCs), facilitating efficient electron collection and reducing recombination losses. While transition metal dichalcogenides have shown promise as ETLs, the potential of samarium (Sm)-encapsulated (5% and 10%) molybdenum diselenide ( MoSe2) remains unexplored. This study investigates the impact of hydrothermal synthesis incorporating SmMoSe2 on the physicochemical properties and photovoltaic performance of PSCs. J-V performance demonstrates a significant enhancement in solar cell performance with samarium encapsulation. The MoSe2 exhibited a Jsc of 11.27 mA/cm2, Voc of 1.02 V, fill factor of 70%, and power conversion efficiency of 7.97%. In comparison, the SmMoSe2 5% sample showed improved performance with a Jsc of 13.02 mA/cm2, Voc of 1.02 V, fill factor of 78%, and efficiency of 9.46%. The SmMoSe2 10% sample demonstrated the best performance, with a Jsc of 13.93 mA/cm2, Voc of 1.03 V, fill factor of 82%, and a notable power conversion efficiency increase to 10.24%. The enhanced performance of SmMoSe2 10% PSCs can be attributed to accelerated charge transfer at the ETL, improved crystalline morphology and size, reduced band gap, and increased surface area. These findings suggest that SmMoSe2 electron transport layers can substantially enhance the performance of perovskite solar cells, with higher doping levels leading to greater improvements in efficiency.

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Enhanced photovoltaic performance of SmMoSe2 electron transport layer for perovskite solar cells

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