Self-powered, Self-healed and Shape-adaptive Ultraviolet Photodetectors

Emerging of self-healed devices in these years has drawn great attention in both academics and industries. Self-healed devices can autonomically restore the rupture as unexpected destruction occurs, which can efficiently prolong the lifespan of the devices, hence an enhanced durability and decreased replacement cost. As a result, integration of wearable devices with self-healed electronics has become an indispensable issue in smart wearable devices. In this work, we present the first self-powered, self-healed and wearable ultraviolet (UV) photodetector based on the integration of agarose/poly(vinyl alcohol) (PVA) double network (DN) hydrogels, which owns the advantages of good mechanical strength, self-healing ability, and tolerability of multiple damages. With the integration of DN hydrogel substrate, the photodetector enables 90% of initial efficiency to be restored after five healing cycles, and each rapid healing time is suppressed to only 10 s. The proposed device has several merits, including all sp...