Researchers develop a top-down method to produce high-efficiency sub-micron microLEDs.
- yrdo03
- Oct 25, 2024
- 1 min read
Post date: Oct 24, 2024
Posted by MICROLED-info
Researchers from Korea's Kookmin University in Seoul, led by Prof. Young Rag Do, have developed a novel top-down process to fabricate and isolate sub-micron GaN microLEDs. The process combines electrochemical etching and sonochemical separation of the etched porous layer to isolate the microLEDs.
The researchers have used the process to produce Au-coated GaN blue LEDs that offer an EQE of 6.21% (at 4.0 V) and a luminous efficacy of 1,070 cd/m2 (at 10.0 V). The LEDs themselves had a diameter of 750 nm, these are true sub-micon LEDs.
The researchers further investigated the electrochemical variables that affect the nanopore size, separation ratio, and emission characteristics of dot LEDs, as well as the effect of solvent type on ultrasonic separation using a sonochemical process.
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This is a solid step forward—getting 6.21% EQE at just 750nm is impressive for a top-down process. Excited to see where this goes for AR displays! Arrow Puzzle
The development of a top-down method to create high-efficiency sub-micron microLEDs is truly fascinating. I was particularly intrigued by the impressive EQE of 6. 21% achieved with these tiny LEDs. This innovation could really advance display technology and lighting solutions. As someone interested in tech advancements, it’s exciting to think about how such small components can lead to significant improvements in efficiency. If anyone's curious about exploring more applications or insights related to microLEDs, Abyssus provides a practical wiki on various related topics.