Directed semiconductor growth in nanoporous ceramic films is reported. A p-n heterojunction with an interface that is spatially distributed across the complete thickness of the ceramic film is established. The interface area is estimated to be several 100 times larger than its geometric projection. The p-n junction shows excellent rectification and may serve as the basic building block for photovoltaic devices.

1.
U.
Bach
,
D.
Lupo
,
J. E.
Moser
,
F.
Weisörtel
,
J.
Salbeck
,
H.
Spreitzer
, and
M.
Grätzel
,
Nature (London)
395
,
583
(
1998
).
2.
R.
Könenkamp
,
P.
Hoyer
, and
A.
Wahi
,
J. Appl. Phys.
79
,
7029
(
1996
).
3.
B.
O’Regan
and
D. T.
Schwartz
,
Chem. Mater.
10
,
1501
(
1998
).
4.
K.
Tennakone
,
G. R. R. A.
Kumara
,
I. R. M.
Kottegoda
,
V. P. S.
Perera
, and
G. M. L. P.
Aponso
,
J. Phys. D
31
,
2326
(
1998
).
5.
S. Siebentritt, K. Ernst, C.-H. Fischer, R. Könenkamp, and M. C. Lux-Steiner, Proceedings of the 14th European PhotoVoltage Solar Energy Conference, Barcelona, Spain, 1997, p. 1823.
6.
C. J.
Barbe
,
F.
Arendse
,
P.
Comte
,
M.
Jirousek
,
F.
Lenzmann
,
V.
Shklover
, and
M.
Grätzel
,
J. Am. Ceram. Soc.
80
,
3157
(
1997
).
7.
H. J. Möckel, M. Giersig, and F. Willig, Langmuir (to be published).
8.
C. Rost, diploma-thesis, Physics Department, Freie Universität, Berlin, 1999.
9.
B. O’Regan and D. T. Schwartz, in Symposium on Nanostructured Materials in Electrochemistry, edited by G. J. Meyers and P. C. Searson (Electrochemical Society, Pennington, NJ, 1995).
10.
K.
Itoh
,
V.
Chiyokawa
,
M.
Nakao
, and
K.
Honda
,
J. Am. Chem. Soc.
106
,
1630
(
1984
).
11.
C. Rost, K. Ernst, S. Siebentritt, R. Könenkamp, and M. Lux-Steiner, Proceedings of the 2nd World Conference and Exhibition on Photovoltaics, Vienna, 1998, p. 212.
12.
J. Möller, Ch.-H. Fischer, S. Siebentritt, R. Könenkamp, and M. Lux-Steiner, Proceedings of the 2nd World Conference and Exhibition on Photovoltaics, Vienna, 1998, p. 209.
13.
P.
Hoyer
and
R.
Könenkamp
,
Appl. Phys. Lett.
66
,
349
(
1994
).
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