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Self-supervised deep learning for tracking degradation of perovskite light-emitting diodes with multispectral imaging

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jats:titleAbstract</jats:title>jats:pEmerging functional materials such as halide perovskites are intrinsically unstable, causing long-term instability in optoelectronic devices made from these materials. This leads to difficulty in capturing useful information on device degradation through time-consuming optical characterization in their operating environments. Despite these challenges, understanding the degradation mechanism is crucial for advancing the technology towards commercialization. Here we present a self-supervised machine learning model that utilizes a multi-channel correlation and blind denoising to recover images without high-quality references, enabling fast and low-dose measurements. We perform operando luminescence mapping of various emerging optoelectronic semiconductors, including organic and halide perovskite photovoltaic and light-emitting devices. By tracking the spatially resolved degradation in electroluminescence of mixed-halide perovskite blue-light-emitting diodes, we discovered that lateral ion migration (perpendicular to the external electric field) during device operation triggers the formation of chloride-rich defective regions that emit poorly—a mechanism that would not be resolvable with conventional imaging approaches.</jats:p>



46 Information and Computing Sciences, 40 Engineering

Journal Title

Nature Machine Intelligence

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Springer Science and Business Media LLC
Engineering and Physical Sciences Research Council (EP/R023980/1)
European Research Council (756962)
Royal Society (RGF/EA/180085)
European Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (841386)
European Commission Horizon 2020 (H2020) ERC (957513)
Engineering and Physical Sciences Research Council (EP/V027131/1)
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