Proceedings of Online Meetup: Contemporary Stability Challenges in Hybrid Perovskite Photovoltaics (SCHP)
Publication date: 14th April 2020
Hybrid perovskites are heterogeneous on multiple length scales. Nanoscale characterisation by analytical electron microscopy can reveal degradation mechanisms and highlight rational paths toward more efficient and stable devices. Here we show a procedure to produce cross-sectional images and elemental maps of perovskite-based solar cells and LEDs. We provide several example cases to show that electron microscopy can show how perovskite deposition affects its morphology, where organic molecules are located in a perovskite solar cell, how laser scribing damages perovskite, the origin of nonradiative trap sites, and how biasing degrades a perovskite LED by inducing halide segregation. This characterisation technique can be applied to help answer many other questions surrounding halide perovskite devices.
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