The direction of photocurrent in a p–n heterojunction device can be switched by using different wavelengths of light.
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Perovskite multifunctional logic gates via bipolar photoresponse of single photodetector
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Yang, Y. Controlling photocurrent direction with light. Nat Electron 4, 631–632 (2021). https://doi.org/10.1038/s41928-021-00647-0
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DOI: https://doi.org/10.1038/s41928-021-00647-0
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Perovskite multifunctional logic gates via bipolar photoresponse of single photodetector
Nature Communications (2022)