We investigate light-induced degradation of Cu(In,Ga)Se2 (CIGSe) layers by means of time-resolved photoluminescence (TRPL) measurements. Illumination in the range of minutes with 1 sun white light equivalent leads to a strong reduction of the carrier lifetime as determined by TRPL. Ambient storage in the dark, however, does not cause degradation. X-ray photoelectron spectroscopy of the CIGSe surface reveals a light induced enhancement of Na 1s and O 1s core-level emission. The position of the O 1s peak at 531.6 eV is related to a Na-O-CIGSe bonding complex. The light-induced degradation of the CIGSe layer finally translates into inferior open circuit voltages due to the dominance of interface recombination in completed solar cell devices. This study has implications for laboratory research and may need to be regarded in CIGSe module production.

1.
P.
Jackson
,
R.
Wuerz
,
D.
Hariskos
,
E.
Lotter
,
W.
Witte
, and
M.
Powalla
,
Phys. Status Solidi RRL
10
(
8
),
583
586
(
2016
).
2.
M. A.
Green
,
K.
Emery
,
Y.
Hishikawk
,
W.
Warta
, and
E. D.
Dunlop
,
Prog. Photovoltaics: Res. Appl.
24
,
905
913
(
2016
).
3.
D.
Abou-Ras
,
S. S.
Schmidt
,
N.
Schäfer
,
J.
Kavalakkatt
,
T.
Rissom
,
T.
Unold
,
R.
Mainz
,
A.
Weber
,
T.
Kirchartz
,
E. S.
Sanli
,
P. A.
van Aken
,
Q. M.
Ramasse
,
H. J.
Kleebe
,
D.
Azulay
,
I.
Balberg
,
O.
Millo
,
O.
Cojocaru-Mirédin
,
D.
Barragan-Yani
,
K.
Albe
,
J.
Haarstrich
, and
C.
Ronning
,
Phys. Status Solidi RRL
10
(
5
),
363
375
(
2016
).
4.
I. L.
Repins
,
B.
Egaas
,
L. M.
Mansfield
,
M. A.
Contreras
,
C. P.
Muzzillo
,
C.
Beall
,
S.
Glynn
,
J.
Carapella
, and
D.
Kuciauskas
,
Rev. Sci. Instrum.
86
,
013907
(
2015
).
5.
B.
Ohnesorge
,
R.
Weigand
,
G.
Bacher
,
A.
Forchel
,
W.
Riedl
, and
F. H.
Karg
,
Appl. Phys. Lett.
73
(
9
),
1224
1226
(
1998
).
6.
W. K.
Metzger
,
I. L.
Repins
,
M.
Romero
,
P.
Dippo
,
M. A.
Contreras
,
R.
Noufi
, and
D.
Levi
,
Thin Solid Films
517
(
7
),
2360
2364
(
2009
).
7.
W. K.
Metzger
,
I. L.
Repins
, and
M. A.
Contreras
,
Appl. Phys. Lett.
93
,
022110
(
2008
).
8.
R.
Scheer
,
A.
Perez-Rodriguez
, and
W. K.
Metzger
,
Prog. Photovoltaics: Res. Appl.
18
,
467
480
(
2010
).
9.
R. K.
Ahrenkiel
,
N.
Call
,
S. W.
Johnston
, and
W. K.
Metzger
,
Sol. Energy Mater. Sol. Cells
94
,
2197
2204
(
2010
).
10.
M.
Maiberg
and
R.
Scheer
,
J. Appl. Phys.
116
,
123711
(
2014
).
11.
M.
Maiberg
,
T.
Hölscher
,
S.
Zahedi-Azad
,
W.
Fränzel
, and
R.
Scheer
,
Appl. Phys. Lett.
107
,
122104
(
2015
).
12.
D.
Kuciauskas
,
J. V.
Li
,
A.
Kanevce
,
H.
Guthrey
,
M.
Contreras
,
P.
Dippo
, and
K.
Ramanathan
,
J. Appl. Phys.
117
,
185102
(
2015
).
13.
M.
Maiberg
,
C.
Spindler
,
E. C.
Jarzembowski
, and
R.
Scheer
,
Thin Solid Films
582
,
379
382
(
2015
).
14.
A. M.
Gabor
,
J. R.
Tuttle
,
D. S.
Albin
,
M. A.
Contreras
, and
R.
Noufi
,
Appl. Phys. Let.
65
(
2
),
198
200
(
1994
).
15.
M.
Maiberg
,
T.
Hölscher
,
E. C.
Jarzembowski
,
S.
Hartnauer
,
S.
Zahedi-Azad
,
W.
Fränzel
, and
R.
Scheer
,
Thin Solid Films
633
,
208
212
(
2017
).
16.
M.
Maiberg
,
F.
Bertram
,
M.
Müller
, and
R.
Scheer
,
J. Appl. Phys.
121
,
085703
(
2017
).
17.
C.
Heske
,
R.
Fink
,
E.
Umbach
,
W.
Riedl
, and
F.
Karg
,
Appl. Phys. Lett.
68
(
24
),
3431
3433
(
1996
).
18.
R.
Scheer
and
H. W.
Schock
,
Chalcogenide Photovoltaics: Physics, Technologies and Thin Film Devices
(
Wiley-VCH
,
Weinheim
,
2011
).
19.
H.
Wilhelm
,
H. W.
Schock
, and
R.
Scheer
,
J. Appl. Phys.
109
,
084514
(
2011
).
20.
M.
Maiberg
and
R.
Scheer
,
J. Appl. Phys.
116
,
123710
(
2014
).
21.
B. J.
Stanbery
,
E. S.
Lambers
, and
T. J.
Anderson
, in
26th IEEE PVSC
(
1997
), pp.
499
502
.
22.
L.
Kronik
,
D.
Cahen
, and
H. W.
Schock
,
Adv. Mater.
10
(
1
),
31
36
(
1998
).
23.
S.
Chen
,
T.
Jarmar
,
S.
Södergen
,
U.
Malm
,
E.
Wallin
,
O.
Lundberg
,
S.
Jander
,
R.
Hunger
, and
L.
Stolt
,
Thin Solid Films
582
,
35
38
(
2015
).
24.
F.
Engelhardt
,
M.
Schmidt
,
T.
Meyer
,
O.
Seifert
,
J.
Parisi
,
W.
Riedl
,
F.
Karg
,
M.
Schmitt
, and
U.
Rau
,
Ternary Multiternary Compd.
152
,
979
982
(
1998
), ISBN:0-7503-0438-3, ISSN: 0951-3248.
25.
F.
Obereigner
,
N.
Barreau
,
W.
Witte
, and
R.
Scheer
,
J. Appl. Phys.
117
,
055704
(
2015
).
You do not currently have access to this content.