Electromagnetic radiation approximately equal to band‐gap energy has been established as responsible for the dissociation of amorphous As2Se3 and As2S3. The dissociation is accompanied by an optical densification observable as a ``photographic'' effect in thin films of these materials. The dissociation can be expressed by the following equations:
As2Se3→ lim hvxAs+As2−xSe3, 0<x<2 As2S3→ lim hv2As+3S.
The densification is reversible by thermal cycling to higher temperatures. A detailed analysis of the experimental results is given and a mechanism is proposed which explains the photodecomposition reactions and the thermally induced reversibility in As2Se3. The photographic cycling characteristics of As2Se3 are discussed in the light of its potential device application.
1.
M. T.
Kostyshin
,
E. V.
Mikhailovskaya
, and
P. F.
Romanenko
,
Sov. Phys. Solid State
8
,
451
(
1966
).
Google Scholar
 
2.
M. P.
Trubisky
 and
J. H.
Neyhart
,
Appl. Opt.
Suppl.
3
,
59
(
1969
).
Google Scholar
 
3.
S. W. Ing, Jr., Y. S. Chiang, and A. Ward, American Ceramic Society Meeting, 1969 (unpublished).
4.
H. Pinsler (private communication).
5.
E. S. Dana, A Textbook of Mineralogy, 4th ed. (Wiley, New York, 1958), p. 409.
6.
Gmelins Handbuch der Anorganischen Chemie, 8th ed., edited by R. J. Meyer and E. Pietsch (Verlag Chemie, Berlin, 1942), p. 421.
7.
Reference 6, p. 425.
8.
R. I.
Dagwood
 and
A. J.
Forty
,
Phil. Mag.
8
,
1003
(
1963
).
Google Scholar
Crossref
Search ADS
 
9.
M. R.
Tubbs
,
Proc. Roy. Soc. (London)
A280
,
566
(
1964
).
Google Scholar
 
10.
A. J.
Forty
,
R. I.
Dagwood
, and
M. R.
Tubbs
,
J. Sci. Instr.
41
,
274
(
1964
).
Google Scholar
Crossref
Search ADS
 
11.
R. I.
Dagwood
,
A. J.
Forty
, and
M. R.
Tubbs
,
Proc. Roy. Soc. (London)
A284
,
272
(
1965
).
Google Scholar
 
12.
M. B.
Myers
 and
E. J.
Felty
,
Mat. Res. Bull.
2
,
535
(
1967
).
Google Scholar
Crossref
Search ADS
 
13.
J. P. Coughlin, Contributions to the Data on Theoretical Metallurgy; XII. Heats and Free Energies of Formation of Inorganic Oxides. Bur. Mines Bull. No. 542 (U.S. GPO, Washington, D.C., 1954), p. 9.
14.
J. F. Hamilton and F. Urbach, The Theory of the Photographic Process, 3rd ed. (Macmillan, New York, 1966), Chap. 5.
15.
Reference 14, Chap. 4.
16.
G. A. Charnitski (private communication).
This content is only available via PDF.
© 1971 The American Institute of Physics.
1971
The American Institute of Physics
You do not currently have access to this content.