Y. H. Lee^†, I. Song^†, S. H. Kim, J. H. Park, S. O. Park, J. H. Lee, Y. Won, K. Cho, S. K. Kwak^*, J. H. Oh^*, "Perovskite Granular Wire Photodetectors with Ultrahigh Photodetectivity", Adv. Mater. 2020, 2002357

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Joon Hak Oh, Sang Kyu Kwak, and co‐workers synthesize perovskite granular wires by a simple yet effective template‐free self‐assembly. Superb photodetection performance with unprecedentedly high photodetectivity is exhibited, which originates from the low dark current due to the band‐edge modulation along the long axis of the granular wires. This “self‐assembled nanograin engineering” strategy provides a viable method for the development of high‐performance perovskite photodetectors and can be extended to other integrated optoelectronic systems.