Impact Statement:This article first reported that the enhanced light output efficiency of passive-matrix μ-LED display was achieved by employing the tapered sidewalls and DBR passivation ...Show More
Abstract:
The enhanced light output efficiency of passive-matrix micro light-emitting-diode (LED) display was achieved by employing the tapered sidewalls and distributed-Bragg-refl...Show MoreMetadata
Impact Statement:
This article first reported that the enhanced light output efficiency of passive-matrix μ-LED display was achieved by employing the tapered sidewalls and DBR passivation structure. As increasing the number of DBR stacking from 3.5 to 5.5 pairs, the reflectance increased obviously from 81.4% to 98.0% at the wavelength of 450 nm. As the μ-LED display with DBR structure, the output power of 1.07 mW under 1 mA, the EQE of 42% under 0.2 mA, and the luminance of 435 nits were obtained.
Abstract:
The enhanced light output efficiency of passive-matrix micro light-emitting-diode (LED) display was achieved by employing the tapered sidewalls and distributed-Bragg-reflector (DBR) passivation structure. The oblique angles at the bottom of multi-quantum wall and n-GaN are 48.9° and 21.8°, which can favor the planarization structure of pixel interconnection. As increasing the number of DBR (SiO2/TiO2) stacking from 3.5 to 5.5 pairs, the reflectance increased obviously from 81.4% to 98.0% at the wavelength of 450 nm. As the micro-LED display with a multi-function DBR structure, the output power of 1.07 mW under 1 mA, the external-quantum efficiency of 42% under 0.2 mA, and the luminance of 435 nits were obtained.
Published in: IEEE Photonics Journal ( Volume: 12, Issue: 4, August 2020)
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