Abstract

Here, we demonstrate replacing opaque Cr/Pt/Au metal p-electrodes with transparent indium tin oxide (ITO) p-electrodes to increase the light output of InGaN-based micro-light-emitting diodes (micro-LEDs). ITO p-electrodes exhibit high transmittance of ∼ 80% across the visible spectrum and low resistivity, while metal p-electrodes exhibit negligible transmittance and significant absorption. The 20 × 20 µm2 and 50 × 50 µm2 green micro-LED arrays with ITO p-electrodes yield 1.25 and 1.20 times improvement in light output power compared to conventional metal p-electrodes. The on-wafer external quantum efficiency (EQE) of ITO p-electrode devices reach 7.36% and 7.35% at a current density of ≤ 1.6 A/cm2 for 20 × 20 µm2 and 50 × 50 µm2 arrays, while the on-wafer EQE of metal-based ones remain at 5.98% and 6.16%, respectively. This work opens a straightforward yet universal strategy for enhancing micro-LEDs' performance, as ITO p-electrodes can be seamlessly integrated into red, green, and blue micro-LED configurations.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.