The so-called microdisk arrays exhibit excellent crystallinity with a uniform in-plane orientation and strong blue light emission.
The researchers grew the GaN microdisks on a graphene layer (grown on a sapphire substrate) covered with a micro-patterned SiO2 mask using metal–organic vapor-phase epitaxy.
The microdisks were then processed into micro-LEDs and then successfully transferred onto bendable substrates.
The research demonstrated it is possible to grow high quality LEDs on graphene and then integrate it into flexible microLED devices.
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