Proceedings of Online International Conference on Hybrid and Organic Photovoltaics (OnlineHOPV20)
Publication date: 22nd May 2020
Our study provides direct evidence for the existence of multiple length scales of heterogeneity of composition and quantifies their spatial distribution across the grains and grain boundaries (including lateral vs vertical heterogeneity) in CsPbBr3 and its mixed iodide halides. For the first time, we used the powerful imaging technique of cathodoluminescence hyperspectral imaging - combining the strengths of electron beam microscopy and the optical spectroscopy - to obtain highly spatially (<50 nm) and spectrally resolved (<1 nm) information from CsPbBr3 and its mixed iodide halides.
We are grateful for funding from the EPSRC under grant code EP/L017008/1. Dr. L. K. Jagadamma acknowledges support from a Marie Skłodowska-Curie Individual Fellowship (European Commission) (MCIF: No. 745776).
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