Water-resistant flexible GaN LED on a liquid crystal polymer substrate for implantable biomedical applications

A flexible GaN light-emitting diode (LED) has been fabricated on a liquid crystal polymer (LCP) substrate for biomedical applications. The bending radius and fatigue tests demonstrated the mechanically and optically stable characteristics of the GaN LEDs on the flexible substrates. A white light-emitting phosphor-coated GaN LED showed its potential as a next-generation flexible light source. A water-resistant and biocompatible polytetrafluoroethylene (PTFE) coated flexible LED detected prostate-specific antigen (PSA), which is expected to be used in future biomedical devices.

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► We fabricate a flexible GaN light-emitting diode (LED) on a liquid crystal polymer (LCP) substrate for biomedical applications.
► We demonstrate the mechanically and optically stable characteristics of the flexible GaN LED.
► A phosphor-coated white GaN LED shows its potential as a next-generation flexible light source.
► A water-resistant and biocompatible flexible LED biosensor detects prostate-specific antigen.