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

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

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3.57×10^(3)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.

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 3.57×10^(3).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.