Thin films of LiyV2O5 (0<y<1) were made by reactive dc magnetron sputtering of V followed by electrochemical treatment in LiClO4. X‐ray diffractometry showed an orthorhombic structure that varied from nanocrystalline (n‐X ) for unheated substrates to polycrystalline (p‐X ) for substrates at 180 °C. Optical absorption was measured at 0.3<λ<2.5 μm. The semiconductor bandgap lay fixed at ∼0.5 μm for p‐X LiyV2O5 and appeared blue‐shifted in proportion with y for n‐X Liy V2O5. At λ>0.5 μm there are absorption peaks associated with V4+ ions both for p‐X and n‐X materials, and a broad absorption feature for p‐X Liy V2O5 that is tentatively ascribed to electron hopping in the crystallographic b direction. The absorption goes up for increased y, as expected from the higher V4+ density.
REFERENCES
1.
A.
Talledo
, A. M.
Andersson
, and C. G.
Granqvist
, J. Mater. Res.
5
, 1253
(1990
).2.
A. M. Andersson, A. Talledo, C. G. Granqvist, and J. R. Stevens, in Proceedings of the Symposium on Electrochromic Materials, edited by M. K. Carpenter and D. A. Corrigan (The Electrochemical Society, Pennington, 1990) Vol. 90-2, p. 261.
3.
Y.
Fujita
, K.
Miyazaki
, and C.
Tatsuyama
, Jpn. J. Appl. Phys.
24
, 1082
(1985
).4.
Y. Kouda, T. Yoshino, and N. Baba, J. Chem. Soc. Jpn. (1985), p. 1050.
T.
Yoshino
, N.
Baba
, and Y.
Kouda
, J. Surf. Sci. Soc. Jpn.
6
, 198
(1985
);T.
Yoshino
, N.
Baba
, and Y.
Kouda
, Jpn. J. Appl. Phys.
26
, 782
(1987
).5.
A. M.
Andersson
, C. G.
Granqvist
, and J. R.
Stevens
, Proc. Soc. Photo-Opt. Instrum. Eng.
1016
, 41
(1988
);A. M.
Andersson
, C. G.
Granqvist
, and J. R.
Stevens
, Appl. Opt.
28
, 3295
(1989
).6.
S. F.
Cogan
, N. M.
Nguyen
, S. J.
Perotti
, and R. D.
Rauh
, Proc. Soc. Photo-Opt. Instrum. Eng.
1016
, 57
(1988
).7.
8.
S. F.
Cogan
, N. M.
Nguyen
, S. J.
Perotti
, and R. D.
Rauh
, J. Appl. Phys.
66
, 1333
(1989
).9.
S. F. Cogan, in Large-area Chromogenics: Materials and Devices for Transmittance Control, edited by C. M. Lampert and C. G. Granqvist (SPIE Opt. Engr. Press, Bellingham, 1990), p. 313.
10.
S. F. Cogan, R. D. Rauh, T. D. Plante, N. M. Nguyen, and J. D. West wood, in Proceedings of the Symposium on Electrochromic Materials, edited by M. K. Carpenter and D. A. Corrigan (The Electrochemical Society, Pennington, 1990), Proc. Vol. 90-2, p. 99.
11.
P. Baudry, M. A. Aegerter, D. Deroo, and B. Valla, in Proceedings of the Symposium on Electrochromic Materials, edited by M. K. Carpenter and D. A. Corrigan (The Electrochemical Society, Pennington, 1990), Proc. Vol. 90-2, p. 274.
12.
C. R. Walk, in Lithium Batteries, edited by J. P. Gabano (Academic, New York, 1983), p. 265.
13.
E.
Andrukaitis
, E. A.
Bishenden
, P. W. M.
Jacobs
, and J. W.
Lorimer
, J. Power Sources
26
, 475
(1989
).14.
15.
16.
J.
Haemers
, E.
Baetens
, and J.
Vennik
, Phys. Stat. Sol. A
20
, 381
(1973
).17.
18.
V. I. Gaman, V. I. Kosintsev, and V. M. Kalygina, Izv. Vyss. Uch. Zav. Fiz. 1987, No. 6, p. 18
[
Soviet Phys. J.
30
, 461
(1988
)].19.
20.
C.
Faucheur
, R.
Messina
, and J.
Perichon
, J. Electrochem. Soc.
135
, 1871
(1988
).21.
S.
Hub
, A.
Tranchant
, and R.
Messina
, Electrochim. Acta
33
, 997
(1988
).22.
A. Hardy, J. Galy, A. Casalot, and M. Pouchard, Bull. Soc. Chim. Fr. 1965, No. 4, p. 1056.
23.
D. W.
Murphy
, P. A.
Christian
, F. J.
Di Salvo
, and J. V.
Waszaczak
, Inorg. Chem.
18
, 2800
(1979
).24.
P. G.
Dickens
, S. J.
French
, A. T.
Hight
, and M. F.
Pye
, Mater. Res. Bull.
14
, 1295
(1979
).25.
C. R.
Aita
, Y. L.
Liu
, M. L.
Kao
, and S. D.
Hansen
, J. Appl. Phys.
60
, 749
(1986
).26.
27.
C. R.
Aita
, C.-K.
Kwok
, and M. L.
Kao
, Mater. Res. Soc. Symp. Proc.
82
, 435
(1987
).28.
P. G.
Dickens
, A. M.
Chippindale
, and S. J.
Hibble
, Solid State Ionics
34
, 70
(1989
).29.
C.
Cartier
, A.
Tranchant
, M.
Verdaguer
, R.
Messina
, and H.
Dexpert
, Electrochim. Acta
35
, 889
(1990
).30.
Landolt-Börnstein, Numerical Data and Functional Relationships in Science and Technology, New Series III/17g, 195 (1984).
31.
W.
Lambrecht
, B.
Djafari-Rouhani
, M.
Lannoo
, and J.
Vennik
, J. Phys. C
13
, 2485
(1980
);W.
Lambrecht
, B.
Djafari-Rouhani
, M.
Lannoo
, P.
Clauws
, L.
Fiermans
, and J.
Vennik
, J. Phys. C
13
, 2503
(1980
).32.
W.
Lambrecht
, B.
Djafari-Rouhani
, and J.
Vennik
, J. Phys. C
14
, 4785
(1981
).33.
34.
N.
Kenny
, C. R.
Kannewurf
, and D. H.
Whitmore
, J. Phys. Chem. Solids
27
, 1237
(1966
).35.
[
I.
Hevesi
, A. A.
Abdullaev
, and V. S.
Lebedev
, Soviet Phys. Crystallogr.
16
, 275
(1971
)].36.
37.
38.
M. N.
Colpaert
, P.
Clauws
, L.
Fiermans
, and J.
Vennik
, Surf. Sci.
36
, 513
(1973
).39.
40.
41.
S.
Kobayashi
, T.
Takemura
, and F.
Kaneko
, Japan. J. Appl. Phys.
26
, L1274
(1987
).42.
R. J.
Colton
, A. M.
Guzman
, and J. W.
Rabalais
, J. Appl. Phys.
49
, 409
(1978
).43.
44.
45.
46.
J.
Bullot
, P.
Cordier
, O.
Gallais
, M.
Gauthier
, and F.
Babonneau
, J. Non-Cryst. Solids
68
, 135
(1984
).47.
C.
Sanchez
, F.
Babonneau
, R.
Morineau
, J.
Livage
, and J.
Bullot
, Philos. Mag.
47
, 279
(1983
).48.
49.
50.
51.
S.
Hayashi
, M.
Fujii
, and K.
Yamamoto
, Jpn. J. Appl. Phys.
28
, L1464
(1989
).52.
B. F. Faughnan and R. S. Crandall, in Display Devices, edited by J. I. Pankove, Topics in Applied Physics (Springer, Berlin, 1980), Vol. 40, p. 181.
This content is only available via PDF.
© 1991 American Institute of Physics.
1991
American Institute of Physics
You do not currently have access to this content.
