A critical analysis is given of possible mechanisms of light‐induced degradation in amorphous Si:H (a‐Si:H) and of the constraints imposed on degradation models by recent experimental observations. Using an analogy with processes in recombination‐enhanced degradation of GaAs, it is shown that current intrinsic models for a‐Si:H are deficient in two significant respects. It is also found that these intrinsic models cannot explain several important observations. An alternative extrinsic model is shown to be free of these deficiencies.

1.
For a recent review see H. Fritzsche, in Optical Effects in Amorphous Semiconductors, edited by P. Taylor and S. Bishop, AIP Conf. Proc. No. 120, 478 (1984).
2.
J. D.
Weeks
,
J. C.
Tully
, and
L. C.
Kimerling
,
Phys. Rev. B
12
,
3286
(
1975
).
3.
L. C.
Kimerling
,
Solid State Electron.
21
,
1391
(
1978
).
4.
M.
Stutzmann
,
W. B.
Jackson
, and
C. C.
Tsai
,
Appl. Phys. Lett.
45
,
1075
(
1984
).
5.
Z. E.
Smith
,
S.
Wagner
, and
B. W.
Faughnan
,
Appl. Phys. Lett.
46
,
1078
(
1985
).
6.
W. Kruhler, H. Pfleiderer, R. Plattner, and W. Stetter, in Optical Effects in Amorphous Semiconductors, edited by P. Taylor and S. Bishop, AIP Conf. Proc. No. 120, 311 (1984).
7.
R. Crandall, in Tetrahedrally‐Bonded Amorphous Semiconductors, edited by D. Adler and H. Fritzsche (Plenum, New York, 1985), p. 315.
8.
L. C. Kimerling (private communication).
9.
C.
Lee
,
W.
Ohlsen
,
P.
Taylor
,
H.
Ullal
, and
G.
Ceasar
,
Phys. Rev. B
31
,
100
(
1985
).
10.
R. A.
Street
,
J.
Zesch
, and
M.
Thompson
,
Appl. Phys. Lett.
43
,
672
(
1983
) and references therein.
11.
A.
Skumanich
,
N.
Amer
, and
W. B.
Jackson
,
Phys. Rev. B
31
,
2263
(
1985
).
12.
J. Robertson, in Optical Effects in Amorphous Semiconductors, edited by P. Taylor and S. Bishop, AIP Conf. Proc. No. 120, 63 (1984).
13.
D.
Adler
,
Phys. Rev. Lett.
41
,
1755
(
1978
).
14.
S.
Guha
,
Appl. Phys. Lett.
45
,
569
(
1984
).
15.
R. Arya, M. Bennett, and A. Catalano in Proc. 6th E. C. Photovoltaic Solar Energy Conf., London 1985 (late news).
16.
A. Catalano (private communication).
This content is only available via PDF.
You do not currently have access to this content.