A University of Hong Kong CityU team has engineered a unique type of self-assembled monolayer, or SAM for short, and anchored it on a nickel oxide surface as a charge extraction layer for building perovskite solar cells. Perovskite solar cells are a promising frontier in the solar energy landscape, known for their impressive power conversion efficiency. However, they have one significant drawback thermal instability, i.e. they don’t tend to perform well when exposed to high temperatures.
So our solution was akin to adding a heat-resistant armor – a layer of nickel oxide nanoparticles, topped by a SAM, achieved through an integration of various experimental approaches and theoretical calculations,” Professor Zhu said. To counteract this issue, the CityU team introduced an innovative solution anchoring the SAM onto an inherently stable nickel oxide surface, thereby enhancing the SAM’s binding energy on the substrate.
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