Mono-crystalline silicon single heterojunction solar cells on flexible, ultra-thin (∼25 μm) substrates have been developed based on a kerf-less exfoliation method. Optical and electrical measurements demonstrate maintained structural integrity of these flexible substrates. Among several single heterojunction ∼25 μm thick solar cells fabricated with un-optimized processes, the highest open circuit voltage of 603 mV, short circuit current of 34.4 mA/cm2, and conversion efficiency of 14.9% are achieved separately on three different cells. Preliminary reliability test results that include thermal shock and highly accelerated stress tests are also shown to demonstrate compatibility of this technology for use in photovoltaic modules.

Topics
Short circuit, Electrical properties and parameters, Heterostructures, Electric measurements, Transition metals, Chemical elements, Photovoltaics, Passivation, Solar cells, Cell processes
1.
M. A.
 
Green
,
A.
 
Blakers
,
J.
 
Shi
,
E. M.
 
Keller
, and
S. R.
 
Wenham
,
IEEE Trans. Electron Devices
 
31
,
679
(
1984
).
https://doi.org/10.1109/T-ED.1984.21589
Google Scholar
Crossref
Search ADS
 
2.
T.
 
Tiedje
,
E.
 
Yablonovitch
,
G. D.
 
Cody
, and
B. G.
 
Brooks
,
IEEE Trans. Electron Devices
 
31
,
711
(
1984
).
https://doi.org/10.1109/T-ED.1984.21594
Google Scholar
Crossref
Search ADS
 
3.
F.
 
Dross
,
J.
 
Robbelein
,
B.
 
Vandevelde
,
E.
 
Van Kerschaver
,
I.
 
Gordon
,
G.
 
Beaucarne
, and
J.
 
Poortmans
,
Appl. Phys. A: Mater. Sci. Process.
 
89
,
149
(
2007
)
https://doi.org/10.1007/s00339-007-4195-2
.
Google Scholar
Crossref
Search ADS
 
4.
F. J.
 
Henley
, in
Proceedings of IEEE 35th Photovoltaic Specialist Conference, Honolulu, HI, 20-25 June
(
2010
), p.
001184
.
5.
R.
 
Martini
,
M.
 
Gonzalez
,
F.
 
Dross
,
A.
 
Masolin
,
J.
 
Vaes
,
D.
 
Frederickx
, and
J.
 
Poortmans
, in
Proceedings of 2nd Silicon PV Conference, Leuven, Germany, 3-5 April
(
2012
), p.
567
.
6.
L.
 
Mathew
 and
D.
 
Jawarani
, U.S. patent 7,749,884 (6 July
2010
).
7.
Y.
 
Zhai
,
L.
 
Mathew
,
R.
 
Rao
,
D.
 
Xu
, and
S. K.
 
Banerjee
,
Nano Lett.
 
12
,
5609
(
2012
).
https://doi.org/10.1021/nl302735f
Google Scholar
Crossref
Search ADS
PubMed
 
8.
E.
 
Onyegam
,
D.
 
Sarkar
,
M.
 
Hilali
,
S.
 
Saha
,
R. A.
 
Rao
,
L.
 
Mathew
,
D.
 
Jawarani
,
J.
 
Mantey
,
M.
 
Ainom
,
R.
 
Garcia
,
W.
 
James
, and
S. K.
 
Banerjee
,
Sol. Energy Mater. Sol. Cells
 
111
,
206
(
2013
)
https://doi.org/10.1016/j.solmat.2013.01.002
.
Google Scholar
Crossref
Search ADS
 
9.
D.
 
Xu
,
P. S.
 
Ho
,
R. A.
 
Rao
,
L.
 
Mathew
,
S.
 
Smith
,
S.
 
Saha
,
D.
 
Sarkar
,
C.
 
Vass
, and
D.
 
Jawarani
, in
Proceedings of International Reliability Physics Symposium (IRPS), Anaheim, CA, 15-19 April
(
2012
), p.
4A3
–
1
.
10.
R. A.
 
Rao
,
L.
 
Mathew
,
D.
 
Sarkar
,
S.
 
Smith
,
S.
 
Saha
,
R.
 
Garcia
,
R.
 
Stout
,
A.
 
Gurmu
,
M.
 
Ainom
,
E. U.
 
Onyegam
,
D.
 
Xu
,
D.
 
Jawarani
,
J. G.
 
Fossum
,
S. K.
 
Banerjee
,
U. K.
 
Das
,
A. D.
 
Upadhyaya
,
A.
 
Rohatgi
, and
Q.
 
Wang
, in
Proceedings of IEEE 38th Photovoltaic Specialist Conference, Austin, TX, 3-8 June
(
2012
), p.
001837
.
11.
F. N.
 
Sinnadurai
,
Microelectron. Reliab.
 
13
,
23
(
1974
)
https://doi.org/10.1016/0026-2714(74)90207-8
.
Google Scholar
Crossref
Search ADS
 
12.
R. A.
 
Sinton
 and
A.
 
Cuevas
,
Appl. Phys. Lett.
 
69
,
2510
(
1996
).
https://doi.org/10.1063/1.117723
Google Scholar
Crossref
Search ADS
 
13.
B.
 
Chabra
,
S.
 
Bowden
,
R. L.
 
Opila
, and
C. B.
 
Honsberg
,
Appl. Phys. Lett.
 
96
,
063502
(
2010
).
https://doi.org/10.1063/1.3309595
Google Scholar
Crossref
Search ADS
 
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