I will discuss the equilibrium between halide perovskites and halogen gas and how it may be used to electronically dope the perovskites. We previously found that halogen gas can exchange the halides in perovskites through simple redox chemistry, where the halogen oxidizes the halide. Surprisingly, the morphology of the parent film is retained in this apparent gas-solid reaction. More recently, we have studied spontaneous halogen loss in halide perovskites. I will share our understanding of this reaction, which provides insight into the defect chemistry and transport properties of these mixed ionic-electronic conductors.<br/>

Halide perovskites and the halogens

2019 Fall National Meeting

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