Despite the superior efficiencies of perovskite solar cells (PSCs), the relatively low long-term stability of the perovskite layer (against ambient moisture) is a main concern for the commercial/practical applications of PSCs. PEDOT:PSS suffers from the limitations of high acidity and low work function. Lot of solutions are provided to overcome with these problems. Now question is that in which way, dopamine co-polymerized PEDOT:PSS will affect performance (efficiency as well as stability) of perovskite solar cells?
Dear Hasan,
welcome,
It is so that as the material is chemically inert it will be more resistant against the environmental effects. This what is happening when dopamine is added to PEDOT:PSS. The resulting material will be more chemically inert as the PEDOT:PSS is acidic and the dopamine is basic. The new composite material exhibited extremely low acidity and showed highly enhanced device.
For more details please follow the paper in the link: Article Improving the Efficiency and Stability of Inverted Perovskit...
Best wishes
📷
Abdelhalim Zekry (Sir), thank you very much for your valuable suggestions. One more thing, what is the effect of this doping on hygroscopic nature of PEDOT:PSS?
Dear Hassan,
it seems that the doping with dopamine affected the chemical properties of the material and made it less absorptive to he ambient moisture as it became chemically neutral. The indicator for that is that the long term stability of the material became much enhanced.
Best wishes
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