Dynamical properties of Mobil Composition of Matter (MCM)-48 were studied by time-resolved photoluminescence (PL). The PL intensity exhibits a clear nonexponential profile, which can be fitted by a stretched exponential function. In the temperature range from , the PL decay lifetime becomes thermally activated by a characteristic energy of , which is suggested to be an indication of the phonon-assisted nonradiative process. A model is proposed to explain the relaxation behavior of the PL in MCM-48.
REFERENCES
1.
C. T.
Kresge
, M. E.
Leonowicz
, W. J.
Roth
, J. C.
Vartuli
, and J. S.
Beck
, Nature (London)
359
, 710
(1992
).2.
S.
Polarz
and B.
Smarsly
, Nanopor. Mater. J. Nanosci. Nanotech.
2
, 581
(2002
).3.
U.
Ciesla
and F.
Schuth
, Ordered Mesopor. Mater. Micropor. Mesopor.
27
, 131
(1999
).4.
A.
Sayari
and P.
Liu
, Non-silica Period. Mesostru. Mater.: Recen. Prog. Micropor. Mater.
12
, 149
(1997
).5.
P.
Selvam
, S. K.
Bhatia
, and C. G.
Sonwane
, Ind. Eng. Chem. Res.
40
, 3237
(2001
).6.
M. E.
Gimon-Kinsel
, K.
Groothuis
, and K. J.
Balkus
, Jr., Microporous Mesoporous Mater.
20
, 67
(1998
).7.
J. L.
Shen
, P. N.
Chen
, Y. C.
Lee
, P. W.
Cheng
, and C. F.
Cheng
, Solid State Commun.
122
, 65
(2002
).8.
J. L.
Shen
, Y. C.
Lee
, Y. L.
Luio
, P. W.
Cheng
, and C. F.
Cheng
, J. Phys.: Condens. Matter
15
, L297
(2003
).9.
Yu. D.
Glinka
, A. S.
Zyubin
, A. M.
Mebel
, S. H.
Lin
, L. P.
Hwang
, and Y. T.
Chen
, Chem. Phys. Lett.
358
, 180
(2002
).10.
Y.
Zhang
, F.
Phillipp
, G. W.
Meng
, L. D.
Zhang
, and C. H.
Ye
, J. Appl. Phys.
88
, 2196
(2000
).11.
H. J.
Chang
, Y. F.
Chen
, H. P.
Lin
, and C.
Mou
, Appl. Phys. Lett.
78
, 3791
(2001
).12.
Y. C.
Lee
, Y. L.
Liu
, J. L.
Shen
, I. J.
Hsu
, P. W.
Cheng
, C. F.
Cheng
, and C. H.
Ko
, J. Non-Cryst. Solids
(in press).13.
W. J.
Kim
, J. C.
Yoo
, and D. T.
Hayhurst
, Microporous Mesoporous Mater.
49
, 125
(2002
).14.
K.
Schumacher
, M.
Grun
, and K. K.
Unger
, Microporous Mesoporous Mater.
27
, 201
(1999
).15.
G.
Oye
, J.
Sjoblom
, and M.
Stocker
, Microporous Mesoporous Mater.
27
, 171
(1999
).16.
17.
A. Yu.
Kobitski
, K. S.
Zhuravlev
, H. P.
Wagner
, and D. R. T.
Zahn
, Phys. Rev. B
63
, 115423
(2001
).18.
T.
Suemoto
and K.
Tanaka
, Phys. Rev. B
49
, 11005
(1994
).19.
Y.
Kanemitsu
, Phys. Rev. B
53
, 13515
(1996
).20.
G. C.
John
and V. A.
Singh
, Phys. Rev. B
54
, 4416
(1996
).21.
22.
J. C.
Vial
, A.
Bsiesy
, F.
Gaspard
, R.
Herino
, M.
Ligeon
, F.
Mueller
, R.
Romestain
, and R. H.
Macfarlane
, Phys. Rev. B
45
, 14171
(1992
).© 2004 American Institute of Physics.
2004
American Institute of Physics
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