Radiative recombination at low temperatures in GaAsN is often associated with localized excitons. In this short note, we report results from high-resolution time-resolved photoluminescence spectroscopy that indicate that excitons, localized or otherwise, cannot be involved in the recombination process of this alloy system. The risetime of the photoluminescence signal is more than two orders of magnitude shorter than that expected, and found from excitonic recombination in other III–V materials, such as GaAs. We suggest that the radiative recombination in GaAsN takes place between localized electrons and delocalized holes.

1.
S.
Sakai
,
Y.
Ueta
, and
Y.
Teauchi
,
Jpn. J. Appl. Phys. Lett.
32
,
4413
(
1993
).
Google Scholar
 
2.
W.
Shan
,
W.
Walukiewicz
,
J. W.
Ager
III,
E. E.
Haller
,
J. F.
Geisz
,
D. J.
Friedman
,
J. M.
Olson
, and
S. R.
Kurtz
,
Phys. Rev. Lett.
82
,
1221
(
1999
).
Google Scholar
 
3.
J. D.
Perkins
,
A.
Mascarenhas
,
Y.
Zhang
,
J. F.
Geisz
,
D. J.
Friedman
,
J. M.
Olson
, and
S. K.
Kurtz
,
Phys. Rev. Lett.
82
,
3312
(
1999
).
Google Scholar
 
4.
I. A.
Buyanova
,
W. M.
Chen
, and
B.
Monemar
,
MRS Internet J. Nitride Semicond. Res.
6
,
2
(
2001
).
Google Scholar
 
5.
S.
Francoear
,
G.
Sivaraman
,
Y.
Qiu
,
S.
Nikishim
, and
H.
Temkin
,
Appl. Phys. Lett.
72
,
1857
(
1998
).
Google Scholar
 
6.
I. A.
Buyanova
,
W. M.
Chen
,
G.
Pozina
,
J. P.
Bergman
,
B.
Monemar
,
H. P.
Xin
, and
C. W.
Tu
,
Appl. Phys. Lett.
75
,
501
(
1999
).
Google Scholar
 
7.
B. Q.
Sun
,
D. S.
Jiang
,
X. D.
Luo
,
Z. Y.
Xu
,
Z.
Pan
,
L. H.
Li
, and
R. H.
Wu
,
Appl. Phys. Lett.
76
,
2862
(
2000
).
Google Scholar
 
8.
X. D.
Luo
,
Z. Y.
Xu
,
W. K.
Ge
,
Z.
Pan
,
L. H.
Li
, and
Y. W.
Liu
,
Appl. Phys. Lett.
79
,
958
(
2001
).
Google Scholar
 
9.
J.
Shah
,
IEEE J. Quantum Electron.
24
,
276
(
1988
).
Google Scholar
 
10.
M.
Gurioli
,
P.
Borri
,
M.
Colocci
,
M.
Gulia
,
F.
Rossi
,
E.
Molinari
,
P. E.
Selbmann
, and
P.
Lugli
,
Phys. Rev. B
58
,
R13403
(
1998
).
Google Scholar
 
11.
T. C.
Damen
,
J.
Shah
,
D. Y.
Oberli
,
D. S.
Chemla
,
J. E.
Cunningham
, and
J. M.
Kuo
,
Phys. Rev. B
42
,
7434
(
1990
).
Google Scholar
 
12.
J.
Shah
,
B.
Deveaud
,
T. C.
Damen
,
W. T.
Tsang
,
A. C.
Gossard
, and
P.
Lugli
,
Phys. Rev. Lett.
59
,
2222
(
1987
).
Google Scholar
 
13.
C. K.
Sun
,
Y. L.
Huang
,
S.
Keller
,
U. K.
Mishra
, and
S. P.
DenBaars
,
Phys. Rev. B
59
,
13535
(
1999
).
Google Scholar
 
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