Sustainableand Transparent Fish Gelatin Films forFlexible Electroluminescent Devices
2020
In
the past decades, various alternating current electroluminescent
(ACEL) devices, especially the flexible ones, have been developed
and used in flat panel display, large-scale decorating, logo display
lighting, optical signaling, etc. Transparent plastics
are usually used as substrates in ACEL devices; however, they are
undegradable and may cause serious environmental pollution. Herein,
we have developed a flexible transient ACEL device based on transparent
fish gelatin (FG) films. The FG films were made from fish scales,
which are sustainable, cost-efficient, and eco-friendly. These films
could dissolve in water within seconds at 60 °C and degrade completely
within 24 days in soil. The transmittance of these FG films was up
to 91.1% in the visible spectrum, comparable to that of polyethylene
terephthalate (PET) (90.4%). After forming a composite with silver
nanowires (Ag NWs), the Ag NWs-FG film showed a transmittance up to
82.3% and a sheet resistance down to 22.4 Ω sq–1. The fabricated ACEL device based on the Ag NWs-FG film exhibited
high flexibility and luminance up to 56.0 cd m–2. The device could be dissolved in water within 3 min. Our work demonstrates
that the sustainable, flexible, and transparent FG films are a promising
alternative for green and degradable substrates in the field of flexible
electronics, including foldable displays, wearable devices, and health
monitoring.
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