With the ultimate goal of finding simultaneously cost-effective, more earth-abundant, and high-performance alternatives to commercial alternatives for electrocatalysis and solar energy conversion, this presentation will highlight synthetic advances in the use of perovskites as (i) electrocatalysts and (ii) light harvesting materials. In the first case, perovskite metal oxides are promising as versatile functional replacements for platinum-group metals, because of their excellent conductivity, overall resistance to corrosion, good proton transport properties, and potential for interesting acidic surface chemistry, all of which contribute to their high activity and reasonable stability, especially within an alkaline electrolytic environment. In the second case, we have focused on structures associated with an ABX3 structure, incorporating species such as a larger cation A, a smaller cation B, and an anion X. These organometallic halide perovskites have shown very promising performance for energy conversion applications with measured power conversion efficiencies (PCE) routinely surpassing 20%. Several factors appear to play a role in this behavior, with one of the most important ones ascribed to the capability of tuning bandgaps through externally controlled variables such as chemical composition.

Synthesis and characterization of perovskites for energy applications

2019 Spring National Meeting

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