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Proceedings Paper

III-nitride efficient LEDs
Author(s): Pei Jih Wang; Vladislav E. Bougrov; Yury T. Rebane; Yury G. Shreter; Sergey I. Stepanov; C. L. Tseng; B. S. Yavich; Wang N. Wang
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Paper Abstract

A III-nitride blue LED structure based on the system of two wells with charge asymmetric resonance tunneling (CART), which allows enhancing the number of the electrons captured into the active region with the quantum well, was systematically studied. The barrier design uses the charge asymmetric resonance-tunneling phenomenon, which allows making the barrier transparent for electrons and blocking for holes. The growth and post-growth processes were optimized to achieve an efficient CART LED. The output power of 4 mW at the operating current of 20 mA has been achieved, corresponding to the external efficiency of 6%. Results presented in this report include the optimization of the quantum well growth parameters, bowing parameter for InGaN alloys grown on GaN, dry etching of III-nitride materials, Ohmic contacts to p- and n- type GaN, electrostatic discharge (ESD) problems related with the reliability of LEDs. The results presented include also modulation-technique LED characterization to tune the maximum radiative-recombination efficiency in accordance with the common operating current density.

Paper Details

Date Published: 5 December 2001
PDF: 12 pages
Proc. SPIE 4445, Solid State Lighting and Displays, (5 December 2001); doi: 10.1117/12.450033
Show Author Affiliations
Pei Jih Wang, Arima Optoelectronics Corp. (Taiwan)
Vladislav E. Bougrov, A.F. Ioffe Physical-Technical Institute and Arima Research International (Russia)
Yury T. Rebane, A.F. Ioffe Physical-Technical Institute and Arima Research International (Russia)
Yury G. Shreter, A.F. Ioffe Physical-Technical Institute and Arima Research International (Russia)
Sergey I. Stepanov, Arima Optoelectronic Ltd. (United Kingdom)
C. L. Tseng, Arima Optoelectronic Ltd. (United Kingdom)
B. S. Yavich, Arima Optoelectronic Ltd. (United Kingdom)
Wang N. Wang, Arima Optoelectronic Ltd. (United Kingdom)

Published in SPIE Proceedings Vol. 4445:
Solid State Lighting and Displays
Ian T. Ferguson; Yoon-Soo Park; Nadarajah Narendran; Steven P. DenBaars, Editor(s)

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