| Autor: |
Matthew S. Wong, Philip Chan, Norleakvisoth Lim, Haojun Zhang, Ryan C. White, James S. Speck, Steven P. Denbaars, Shuji Nakamura |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Crystals, Vol 12, Iss 5, p 721 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2073-4352 |
| DOI: |
10.3390/cryst12050721 |
| Popis: |
In this study, III-nitride red micro-light-emitting diodes (µLEDs) with ultralow forward voltage are demonstrated on a strain relaxed template. The forward voltage ranges between 2.00 V and 2.05 V at 20 A/cm2 for device dimensions from 5 × 5 to 100 × 100 µm2. The µLEDs emit at 692 nm at 5 A/cm2 and 637 nm at 100 A/cm2, corresponding to a blueshift of 55 nm due to the screening of the internal electric field in the quantum wells. The maximum external quantum efficiency and wall-plug efficiency of µLEDs are 0.31% and 0.21%, respectively. This suggests that efficient III-nitride red µLEDs can be realized with further material optimizations. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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