Laser scribing is an important step to preserve high efficiency of thin-film photovoltaic devices over large areas by production of integral interconnects. The results on picosecond laser application in the CuInxGa(1-x)Se2 (CIGS) solar cell scribing with different wavelengths and beam profiles are presented. Both, the wavelength and beam profile are of essential importance for the selectivity of the ablation process and for its efficiency. The complex absorber layer of copper-indium-gallium diselenide is a thermo-sensitive material, and laser processing might provoke undesirable modification photo-electrical properties of the material. Therefore, the scanning electron microscopy, electron-dispersion spectrometry and micro-Raman have been used to evaluate the processing results to show benefits of the used picosecond lasers in selective scribing on this type of photovoltaics structures. Ultra-short pulses ensured high energy input rate into absorbing material permitting peeling of the layers with no influence on the remaining material. Use of high repetition rate lasers with picosecond pulse duration offers new possibilities for high quality and efficiency patterning of advanced materials for photovoltaics.
REFERENCES
1.
Haas
S.
, Schope
G.
, Zahren
C.
, Stiebig
H.
(2008
) Analysis of the laser ablation processes for thin-film silicon solar cells
, Appl. Phys. A.
92
, 755
–759
.2.
Dhere
N.G.
(2007
) Toward GW/year of CIGS production within the next decade
, Solar Energy Materials and Solar Cells
, 91
, 1376
–1382
.3.
McIntyre
M.
(2009
) Flexible CIGS thin-film PV establishes module manufacturing base, moves closer to BIPV market readiness
, Photovoltaics International
, 4
, 93
–101
.4.
Cheyney
T.
(2008
) Thin film CIGS starts to come of age
, Photovoltaics International
, 1
, 86
–92
.5.
Repins
I.
, Contereras
M.A.
Egaas
B.
, DeHart
C.
, Scharf
J.
, Perkins
C.L.
, To
B.
, Noufi
R.
, (2008
) 19.9%- efficient ZnO/CdS/CuInGaSe2 solar cell with 81.2% fill factor
, Prog. Photovolt: Res. Appl.
, 16
, 235
–239
.6.
Yagioka
T.
, Nakada
T.
(2009
) Cd-free flexible Cu(In,Ga)Se2 thin film solar cells with ZnS(O,OH) buffer layers on Ti foils
, Jap. Appl. Phys. Express
, 2
, 072201
.7.
Dunsky
C.
, Conville
F.
(2008
) Solid-state laser applications in photovoltaics manufacturing
, Proc. SPIE
, 6871
, 687129
.8.
Kijima
S.
, Nakada
T.
(2008
) High-temperature degradation mechanism of Cu(In,Ga)Se2-based thin film solar cells
, Jap. Appl. Phys. Express
, 1
, 075002
.9.
Compaan
A.D.
, Matulionis
I.
, Nakade
S.
(2000
) Laser scribing of polycrystalline thin films
, Optics and Laser Engineering
, 34
, 15
–45
.10.
Buzas
A.
, Geretovszky
Z.
(2007
) Patterning ZnO layers with frequency doubled and quadrupled Nd:YAG laser for PV application
, Thin Solid Films
, 515
, 8495
–8499
.11.
Hermann
J.
, Benfarah
M.
, Bruneau
S.
, Axente
E.
, Coustillier
G.
, Itina
T.
, Guillemoles
J-F.
, Alloncle
P.
(2006
) Comparative investigation of solar cell thin film processing using nanosecond and femtosecond lasers
, J. Phys. D
, 39
, 453
–460
.12.
Hermann
J.
, Benfarah
M.
, Coustillier
G.
, Bruneau
S.
, Axente
E.
, Guillemoles
J-F.
, Sentis
M.
, Alloncle
P.
, Itina
T.
(2006
) Selective ablation of thin films with short and ultrashort laser pulses
, Appl. Surf. Sci.
, 252
, 4814
–4818
.13.
Huber
H.P.
, Englmaier
M.
, Hellwig
C.
, Heiss
A.
, Kuznicki
T.
, Kemnitzer
M.
, Vogt
H.
, Brenning
R.
, Palm
J.
(2009
) High speed structuring of CIS thin-film solar cells with picosecond laser ablation
, Proc. SPIE
, 7203
, 72030R1
–9
.14.
Westin
P.-O.
, Zimmermann
U.
, Edoff
M.
(2008
) Laser patterning of P2 interconnect via in thin-film CIGS PV modules
, Solar Energy Materials & Solar Cells
, 92
, 1230
–1235
.15.
Westin
P.-O.
, Schmidt
S.C.
, Huske
M.
, Edoff
M.
(2009
) Influence of spacial and temporal laser beam characteristics on thin-film ablation
, Proc. 24th EUPVSEC
, Hamburg
.16.
Račiukaitis
G.
, Brikas
M.
, Darčianovas
G.
, Ruthe
D.
, Zimmer
K.
(2007
) Laser structuring of conducting films on transparent substrates
, Proc. SPIE
6732
, 67320C1
–10
.17.
Kessler
F.
, Herrmann
D.
, Powaila
M.
(2005
) Approaches to flexible CIGS thin-film solar cells
, Thin Solid Films
, 480
–481
, 491–498.18.
Ruthe
D.
, Zimmer
K.
, Höche
T.
(2005
) Etching of CuInSe2 thin films – comparison of femtosecond and picosecond laser ablation
, Appl. Surf. Sci.
, 247
, 447
–452
.19.
Gečys
P.
, Račiukaitis
G.
, Gedvilas
M.
, Selskis
A.
(2009
) Laser structuring of thin-film solar ccells on polymers
, Eur. Phys. J.: Appl. Phys.
, 46
, 12508
.20.
Gečys
P.
, Račiukaitis
G.
, Ehrhardt
M.
, Zimmer
K.
, Gedvilas
M.
(2010
) Ps-laser scribing of CIGS films at different wavelengths
, Appl. Phys. A., in press.
21.
Račiukaitis
G.
, Brikas
M
, Gedvilas
M.
, Rakickas
T.
(2007
) Patterning of Indium-Tin Oxide on glass with picosecond lasers
, Appl. Surf. Sci.
, 253
, 6570
–6574
.22.
Račiukaitis
G.
, Brikas
M.
, Gedvilas
M
, Darčianovas
G.
(2007
) Patterning of ITO layer on glass with high repetition rate picosecond lasers
, J. Laser Micro/ Nanoengineering
, 2
, 1
–6
.23.
Liu
J.M.
(1982
) Simple technique for measurements of pulsed Gaussian-beam spot sizes
, Optics Letters
, 7
, 196
–198
.24.
Xu
C.-M.
, Xu
X.-L.
, Xu
J.
, Yang
X.-J.
, Zuo
J.
, Kong
N.
, Huang
W.-H.
, Liu
H.-T.
(2004
) Composition dependence of the Raman A1 mode and additional mode in tetragonal Cu–In–Se thin films,
Semicond. Sci. Technol.
19
, 1201
–1206
.25.
Alvarez-Garcia
J.
, Barcones
B.
, Perez-Rodriguez
A.
, Romano-Rodriguez
A.
, Morante
J. R.
, Janotti
A.
, Wei
S. H.
, Scheer
R.
(2005
) Vibrational and crystalline properties of polymorphic CuInC2 (C=Se,S) chalcogenides
, Phys. Rev. B
, 71
, 054303
.26.
Wang
D.
, Wan
L.
, Bai
Z.
, Cao
Y.
(2008
) Mixed phases in p-type CuInSe2 thin films detected by using micro-Raman scattering spectroscopy
, Appl. Phys. Lett.
92
, 211912
.27.
Fontané
X.
, Izquierdo-Roca
V.
, Calvo-Barrio
L.
, Alvarez-Garcia
J.
, Pérez-Rodríguez
A.
, Morante
J. R.
, Witte
W.
(2009
) In-depth resolved Raman scattering analysis of secondary phases in Cu-poor CuInSe2 based thin films
, Appl. Phys. Lett.
, 95
, 121907
.28.
Račiukaitis
G.
, Gečys
P.
(2010
) Picosecond-laser structuring of thin films for CIGS solar cells
, J. Laser Micro/Nanoengineering
, 5
, 10
–15
.29.
Haas
S.
, Gordijn
A.
, Stiebig
H.
(2008
) High speed laser processing for monolithical series interconnection of silicon thin-film modules
, Prog. Photovolt: Res. Appl.
16
, 195
–203
.
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