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2026-06-22
Semiconductor Today
Researchers in China report on tunnel-junction (TJ) blue micro light-emitting diodes (LEDs) reaching wall-plug efficiencies of 45.23% [Yao Wang et al, Optics Express, v34, p17683, 2026]. The researchers used a device structure that avoided the post-growth thermal annealing, which is normally applied to activate the magnesium doping needed to realize p-type gallium nitride (p-GaN).
“This work elim