Improving optoelectronic performance and modulation bandwidth of green µ-LEDs via a compound pre-strained strategy.
Opt Lett
; 49(4): 883-886, 2024 Feb 15.
Article
em En
| MEDLINE
| ID: mdl-38359207
ABSTRACT
A composite strain-modulation strategy to achieve high-performing green µ-LED devices for visible light communication is proposed. Compared with the conventional pre-well structure, introducing a pre-layer to enlarge the lateral lattice constant of the underlayer decreased the strain in the overall strain-modulated layer and MQW. This improved the crystal quality and suppressed the quantum confinement Stark effect. Using this modulation strategy, the green µ-LED array with the compound pre-strained structure exhibited a light output power of 20.5â
mW and modulation bandwidth of 366â
MHz, corresponding to improvements of 61% and 78%, respectively, compared with those of µ-LEDs with a pre-well structure.
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MEDLINE
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En
Ano de publicação:
2024
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Article