Due to its indirect bandstructure, bulk crystalline silicon is generally regarded as a poor light emitter. In contrast to this common perception, we report here on surprisingly large external photoluminescence quantum efficiencies of textured bulk crystalline silicon wafers of up to 10.2% at and of 6.1% at room temperature. Using a theoretical model to calculate the escape probability for internally generated photons, we can conclude from these experimental figures that the radiative recombination probability or internal luminescence quantum efficiency exceeds 20% at room temperature.
REFERENCES
1.
2.
3.
4.
L.
Pavesi
, L.
Dal Negro
, C.
Mazzoleni
, G.
Franzo
, and F.
Priolo
, Nature (London)
408
, 440
(2000
).5.
Y. Q.
Wang
, G. L.
Kong
, W. D.
Chen
, H. W.
Diao
, C. Y.
Chen
, S. B.
Zhang
, and X. B.
Liao
, Appl. Phys. Lett.
81
, 4174
(2002
).6.
Z. H.
Lu
, D. J.
Lockwood
, and J. M.
Baribeau
, Nature (London)
378
, 258
(1995
).7.
8.
9.
M. A.
Green
, J.
Zhao
, A.
Wang
, P.
Reece
, and M.
Gal
, Nature (London)
412
, 805
(2001
).10.
J.
Zhao
, A.
Wang
, P.
Altermatt
, and M. A.
Green
, Appl. Phys. Lett.
66
, 3636
(1995
).11.
12.
P.
Würfel
, S.
Finkbeiner
, and E.
Daub
, Appl. Phys. A: Mater. Sci. Process.
60
, 67
(1995
).13.
14.
T.
Trupke
, E.
Daub
, and P.
Würfel
, Sol. Energy Mater. Sol. Cells
53
, 103
(1998
).15.
16.
T. Trupke, J. Zhao, A. Wang, and M. A. Green, Proceedings of the IEEE-COMMAD Conference, December 2002, Sydney, Australia (in press).
17.
18.
19.
H.
Schlangenotto
, H.
Maeder
, and W.
Gerlach
, Phys. Status Solidi A
21
, 357
(1974
).
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