Blue multi-quantum-well light-emitting diodes (LEDs) with GaInN quantum wells and polarization-matched AlGaInN barriers are grown by metal-organic chemical vapor deposition. The use of quaternary alloys enables an independent control over interface polarization charges and bandgap and has been suggested as a method to reduce electron leakage from the active region, a carrier loss mechanism that can reduce efficiency at high injection currents—an effect known as the efficiency droop. The LEDs show reduced forward voltage, reduced efficiency droop, and improved light-output power at large currents compared to conventional LEDs.
REFERENCES
1.
M. H.
Kim
, M. F.
Schubert
, Q.
Dai
, J. K.
Kim
, E. F.
Schubert
, J.
Piprek
, and Y.
Park
, Appl. Phys. Lett.
91
, 183507
(2007
).2.
M. F.
Schubert
, S.
Chhajed
, J. K.
Kim
, E. F.
Schubert
, D. D.
Koleske
, M. H.
Crawford
, S. R.
Lee
, A. J.
Fischer
, G.
Thaler
, and M. A.
Banas
, Appl. Phys. Lett.
91
, 231114
(2007
).3.
I. V.
Rozhansky
and D. A.
Zakheim
, Phys. Status Solidi C
3
, 2160
(2006
).4.
I. V.
Rozhansky
and D. A.
Zakheim
, Phys. Status Solidi A
204
, 227
(2007
).5.
Y. C.
Shen
, G. O.
Müller
, S.
Watanabe
, N. F.
Gardner
, A.
Munkholm
, and M. R.
Krames
, Appl. Phys. Lett.
91
, 141101
(2007
).6.
N. F.
Gardner
, G. O.
Müller
, Y. C.
Shen
, G.
Chen
, S.
Watanabe
, W.
Götz
, and M. R.
Krames
, Appl. Phys. Lett.
91
, 243506
(2007
).7.
A. A.
Efremov
, N. I.
Bochkareva
, R. I.
Gorbunov
, D. A.
Larinovich
, Yu. T.
Rebane
, D. V.
Tarkhin
, and Yu. G.
Shreter
, Semiconductors
40
, 605
(2006
).8.
A. Y.
Kim
, W.
Götz
, D. A.
Steigerwald
, J. J.
Wierer
, N. F.
Gardner
, J.
Sun
, S. A.
Stockman
, P. S.
Martin
, M. R.
Krames
, R. S.
Kern
, and F. M.
Steranka
, Phys. Status Solidi A
188
, 15
(2001
).9.
S. F.
Chichibu
, T.
Azuhata
, M.
Sugiyama
, T.
Kitamura
, Y.
Ishida
, H.
Okumurac
, H.
Nakanishi
, T.
Sota
, and T.
Mukai
, J. Vac. Sci. Technol. B
19
, 2177
(2001
).© 2008 American Institute of Physics.
2008
American Institute of Physics
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