Abstract: A wearable and self-powered perovskite photodetector was obtained by drop-coating method on polyester-cotton cloth substrate. The samples were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). The photo response performance of the device under various conditions was measured. The results show that the perovskite crystals are preferentially distributed between the gaps of the fibers. At a bias of 1 V, the responsivity of the device is 82 mA/W, the response time is 32 ms and the recovery time is 33 ms. The device can also work without bias, exhibiting a high on/off ratio of 3.57×10³. The device shows good stability under bending conditions. The device fabricated directly on the garment shows good performance.  The device possesses long-term stability, maintaining its original high performance after at least 60 d.

Key words: hybrid organic-inorganic perovskite, photodetector, self-powered, stability, wearable