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Efficient and stable perovskite solar cells with regulated depletion region - Nature Photonics
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Irreversible ion migration from the perovskite layer to the charge transport layer and metal electrodes causes irreversible efficiency loss in perovskite solar cells. Confining the mobile ions within the perovskite layer is a promising strategy to improve the long-term operational stability of solar cells. Here we inhibit the migration of iodide ions out of the perovskite under light illumination by creating a depletion region inside the perovskite layer.
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