An opto-thermal study of high brightness 280 nm emission AlGaN micropixel light-emitting diode arrays
Abstract
We present a study of the light output power and the thermal impedance of 281 nm emission AlGaN based micropixel LEDs. A modular interconnected micropixel array design is presented which enables dense packing with area and power scalability. We study 5–15 μm diameter stand-alone devices and parallel-connected micropixel arrays with 5 μm interpixel gaps. A standalone 5 μm pixel emits 291 W cm−2 at 10.2 kA cm−2 DC-drive. A power as high as 23 mW (361 W cm−2) was measured at a pulsed-pump current of 800 mA (∼15 kA cm−2) for an interconnected array. These are the smallest and brightest DUV LEDs to date.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 17, 2020
- Source ID
- 10.35848/1882-0786/abd140
Entities
People
- Abdullah Mamun
- Asif Khan
- Grigory Simin
- Kamal Hussain
- M. V. S. Chandrashekhar
- Md. Didarul Alam
- Mikhail Gaevski
- Richard Floyd
- Samia Islam
- Shahab Mollah
Organizations
- Army Research Office
- Defense Advanced Research Projects Agency
- Division of Electrical, Communications & Cyber Systems
- Office of Naval Research