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Thus, senseless optoelectronic devices with high response performance under ambient environment have an extensive application space in improving the interfacing between users and computers. Herein, a concept of wearable perovskite\u2010based shadow recognition sensor is demonstrated for ambient and nonobtrusive human\u2013computer interaction. The multidimensional ordered nucleation and growth of perovskite crystals are promoted by introducing the self\u2010driving effect of liquid crystal (LC) oligomers. The resulted LC\u2010doped perovskite film (LC\u2010PVK) with micrometer\u2010sized grains can output relatively high photocurrent under indoor ambient light (\u2248500\u2009lux). The LC\u2010based device exhibits over a hundred times of on\u2013off ratio and fast response of millisecond level even after storage for more than 1200\u2009h. 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