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InAlN-based LEDs emitting in the near-UV region
Pampili, Pietro; Zubialevich, Vitaly Z.; Maaskant, Pleun; Akhter, Mahbub; Corbett, Brian; Parbrook, Peter J.
Fully functional InAlN-based ultraviolet LEDs emitting at 340–350 nm were demonstrated for the first time; detailed electrical and optical characterization is presented and discussed. Results from the measurements at pulsed conditions are in agreement with the attribution of the dominant electroluminescence peak to near-band-edge emission. The composition of the AlGaN barriers was chosen to give the same internal polarization field as that of the InAlN wells. A simulation study of this polarization-matched heterostructure shows a significant increase in the electron-hole overlap integral if compared with a standard AlGaN/AlGaN active region having the same level of carrier confinement. Limitations and problems of these preliminary devices are also presented, and possible future work aimed at increasing their efficiency is discussed.
Keyword(s): InAlN-based ultraviolet LEDs; Optical characterization; Near-UV region
Publication Date:
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: University College Cork
Funder(s): Science Foundation Ireland
Citation(s): Pampili, P., Zubialevich, V.Z., Maaskant, P., Akhter, M., Corbett, B. and Parbrook, P.J., 2019. InAlN-based LEDs emitting in the near-UV region. Japanese Journal of Applied Physics, 58(SC), (SCCB33). DOI:10.7567/1347-4065/ab106b
Publisher(s): IOP Science
File Format(s): application/pdf
Related Link(s):
First Indexed: 2019-11-21 06:49:00 Last Updated: 2019-11-21 06:49:00