Study of the emission extraction efficiency of mesa-LEDs with a narrow-gap InAsSb active region

A series of light-emitting diodes (LEDs) (emission peak wavelength λ max = 3.6 μm) with cone-shaped mesas, which have concave lateral surfaces and heights between 10 to 130 μm, has been developed. The dependence of the emission efficiency for these LEDs on mesa height has been studied at different i...

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Bibliographic Details
Published in:Semiconductors (Woodbury, N.Y.) N.Y.), 2012-02, Vol.46 (2), p.236-240
Main Authors: Grebenshchikova, E. A., Imenkov, A. N., Kizhaev, S. S., Golovin, A. S., Yakovlev, Yu. P.
Format: Article
Language:English
Subjects:
Light-emitting diodes
Magnetic Materials
Magnetism
Optoelectronics industry
Physics
Physics and Astronomy
Physics of Semiconductor Devices
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Summary:A series of light-emitting diodes (LEDs) (emission peak wavelength λ max = 3.6 μm) with cone-shaped mesas, which have concave lateral surfaces and heights between 10 to 130 μm, has been developed. The dependence of the emission efficiency for these LEDs on mesa height has been studied at different injection currents at the temperatures 77 and 298 K. The form of the dependence observed is in agreement with the results of theoretical calculations. It is shown that the effective absorption coefficient, caused by emission extraction from the crystal, may be as large as 3 cm −1 for LEDs with the highest mesa (130 μm) among the diodes in this series. The emission extraction coefficient is close to 30% at the temperature 298 K and 94% at 77 K.
ISSN:1063-7826
1090-6479
DOI:10.1134/S1063782612020121