Low Efficiency Attenuation and Stable Monochromaticity for Non-polar Mplane Micro-light-emitting-diodes (Micro-LEDs)

Liu，Yibo1; Feng，Feng1; Zhang，Ke1,2; Chan，Ka Wah3; Liu，Zhaojun1,2,3; Kwok，Hoi Sing1

10.1002/sdtp.15846

2022

0097-966X

2168-0159

Digest of Technical Papers - SID International Symposium

53

S1

62-65

In this paper, the gallium nitride (GaN) free-standing non-polar m-plane micro-LEDs and polar c-plane micro-LEDs on patterned sapphire substrate with a 550-nm emission light were fabricated and characterized. Compared with c-plane micro-LEDs suffering from strong quantum confined stark effect (QCSE), the absence of polarization effect in m-plane devices contributed to a lower efficiency attenuation and narrower peak and color shift with elevating current density. Specifically, the peak wavelength shift for c-plane and m-plane micro-LEDs was 11.81 nm and 8.12 nm respectively from 1 to 500 A/cm2, and the efficiency droop ratio was 50.2% for c-plane and 27.2% for mplane devices from 0.1 to 300 A/cm2. Importantly, our m-plane micro-LEDs achieved a stable monochromaticity and wider color gamut under different injection current density (97.9% and 98.2% of Rec. 2020 at 1 and 500 A/cm2).

efficiency attenuation GaN-based Micro-LEDs non-polar m-plane polar c-plane stable monochromaticity

Corresponding

English

2-s2.0-85141897636

Scopus

1.Hong Kong University of Science and Technology,Hong Kong
2.Southern University of Science and Technology,Shenzhen,China
3.Shenzhen Sitan Technology Co.,Ltd.,Shenzhen,China

Liu，Yibo,Feng，Feng,Zhang，Ke,et al. Low Efficiency Attenuation and Stable Monochromaticity for Non-polar Mplane Micro-light-emitting-diodes (Micro-LEDs)[C],2022:62-65.