Luminous Properties of Red, Green, and Blue Micro-LEDs and the Impacts on Color Gamut

Tong, Chang-Dong; Li, Guangyao; Zheng, Xi; Chen, Canbin; Ke, Zhijie; Wu, Rongxing; Wu, Tingzhu; Lu, Yijun; Chen, Zhong; Zhuang, Jian-Bang; Guo, Weijie

doi:10.1109/ted.2023.3247362

Cited by 4 publications

(1 citation statement)

References 23 publications

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“…long-term stability, and a wide color gamut, making it a promising alternative to AM-OLED displays. [11][12][13][14] Therefore, highefficiency micro LED display technology has made it possible to create micro-LED televisions or augmented reality (AR) displays through the assembly of micro-LED modules or the mass transfer of individual micro-LEDs. [15][16][17][18][19] However, despite the advantages that micro-LED display technology offers over TFT-LCD and AM-OLED displays, its high production costs and material expenses remain obstacles to its widespread application, particularly for home-use televisions and smart glasses.…”

Section: Doi: 101002/adfm202303727mentioning

confidence: 99%

Development and Isolation of Dot LEDs for Display Applications through Electrochemical Etching and Sonochemical Separation

Ko,

Hong,

et al. 2023

Adv Funct Materials

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This paper presents a top‐down fabrication and an isolation process for producing billions of multifunctional dot light‐emitting diodes (LEDs) without a sacrificial layer. The process involves a combination of electrochemical etching (ECE) of an n‐GaN layer and sonochemical separation of an etched porous layer to isolate the dot LEDs. The structure of the developed dot LEDs can be expressed as Au/indium tin oxide (ITO)/p‐GaN/multiple quantum well (MQW)‐InGaN/n‐GaN@SiO2. The nanopore size, separation ratio, and emission characteristics of dot LEDs produced by ECE are investigated, as well as the solvent type on ultrasonic separation in the sonochemical process. Blue electroluminance devices fabricated in a vertical structure using dot LEDs exhibit a peak external quantum efficiency (EQE) of 6.21% at an applied voltage of 4.0 V, and a luminous efficacy of 1070 cd m−2, at an applied voltage of 10.0 V. Although the current technology for blue dot LEDs may not produce a higher EQE than the existing display technologies, it is essential to consider that the development of dot LED displays is still in its early stages. Furthermore, the findings show that the dot LEDs have the potential to significantly reduce material costs and provide new opportunities for nanoscale GaN‐based LED displays.

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