基于聚酯棉布的可穿戴自供电长期稳定钙钛矿光电探测器

在聚酯棉布衬底上, 通过滴涂法得到可穿戴且自供电的钙钛矿光电探测器, 并利用扫描电子显微镜(SEM)、 能谱仪(EDS)和X射线衍射仪(XRD)对样品进行表征, 测试器件在各种条件下的光响应性能. 结果表明： 钙钛矿晶体优先分布在布料的缝隙间； 在1 V的偏压下, 器件的响应度为82 mA/W, 响应时间为32 ms, 恢复时间为33 ms； 器件在没有偏压的情况下也可工作, 表现出3.57×10³的高开关比； 在弯曲条件下稳定性良好； 直接在衣服上制备的器件具有良好的性能； 器件具有长期稳定性, 至少60 d后仍保持其最初的高性能.

Wearable and Self-powered Perovskite Photodetector with Long-Term Stability Based on Polyester-Cotton Cloth

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.