Abstract
Building transient electronics are promising and emerging strategy to alleviate the pollution issues from electronic waste (e-waste). Although a variety of transient devices comprising organic and inorganic materials have been described, transient light emitting devices are still elusive but highly desirable because of the huge amount of lighting and display related consumer electronics. Here we report a simple and efficient fabrication of large-area flexible transient alternating current electroluminescent (ACEL) device through a full-solution processing method. Using transparent flexible AgNW-polymer as both electrodes, the devices exhibit high flexibility and both ends side light emission, with the features of controlled size and patterned structure. By modulating the mass ratio of blue and yellow phosphors, the emission color is changed from white to blue. Impressively, the fabricated ACEL device can be thoroughly dissolved in water within 30 min. Our strategy combining such advances in transient light emitting devices with simple structure, widely used materials, full solution process, and high solubility will demonstrate great potential in resolving the e-waste from abandoned light-emitting products and expand the opportunities for air-stable flexible light emitting devices.
Highlights
Transient electronics, with a key feature that they can afterward physically disappear and degrade to the surrounding environment with no or minimum impact[7], has made great progress
Studies on transient light emitting devices which account for a large part in the lighting and display market are still absent, the quantity of light emitting devices related products is about 42 million tonnes per year globally[21]
The fundamental light-emitting mechanism of phosphor-based alternating current electroluminescent (ACEL) device is known to be solid-state cathode luminescence that the light emission arises from impact excitation of the emitting layer by hot electrons accelerated through an inorganic layer[22]
Summary
Transient electronics ( named soluble electronics), with a key feature that they can afterward physically disappear and degrade to the surrounding environment with no or minimum impact[7], has made great progress. It is urgent to develop facile method, especially full-solution process, for the large-area and scalable fabrication of transient light emitting devices. For the first time, we report a full solution processing method for the large-area and scalable fabrication of transient ACEL devices.
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