We use transient photovoltage and differential charging experiments, complemented by transient absorption data, to determine charge carrier lifetimes and densities in a poly(3-hexylthiophene): methanofullerene solar cell at as a function of white light-bias intensity. For a typical device, the charge carrier decay dynamics are observed to exhibit an approximately third order dependence on charge density .
REFERENCES
1.
J.
Peet
, J. Y.
Kim
, N. E.
Coates
, W. L.
Ma
, D.
Moses
, A. J.
Heeger
, and G. C.
Bazan
, Nat. Mater.
6
, 497
(2007
).2.
Y.
Kim
, S.
Cook
, S. M.
Tuladhar
, S. A.
Choulis
, J.
Nelson
, J. R.
Durrant
, D. D. C.
Bradley
, M.
Giles
, I.
McCulloch
, C. S.
Ha
, and M.
Ree
, Nat. Mater.
5
, 197
(2006
).3.
L. J. A.
Koster
, E. C. P.
Smits
, V. D.
Mihailetchi
, and P. W. M.
Blom
, Phys. Rev. B
72
, 085205
(2005
).4.
A. J.
Mozer
, G.
Dennler
, N. S.
Sariciftci
, M.
Westerling
, A.
Pivrikas
, R.
Osterbacka
, and G.
Juska
, Phys. Rev. B
72
, 035217
(2005
).5.
G.
Juska
, G.
Sliauzys
, K.
Genevicius
, K.
Arlauskas
, A.
Pivrikas
, M.
Scharber
, G.
Dennler
, N. S.
Sariciftci
, and R.
Osterbacka
, Phys. Rev. B
74
, 115314
(2006
).6.
A.
Pivrikas
, G.
Juska
, A. J.
Mozer
, M.
Scharber
, K.
Arlauskas
, N. S.
Sariciftci
, H.
Stubb
, and R.
Osterbacka
, Phys. Rev. Lett.
94
, 176806
(2005
).7.
B. C.
O’Regan
and J. R.
Durrant
, J. Phys. Chem. B
110
, 8544
(2006
).8.
I.
Montanari
, A. F.
Nogueira
, J.
Nelson
, J. R.
Durrant
, C.
Winder
, M. A.
Loi
, N. S.
Sariciftci
, and C.
Brabec
, Appl. Phys. Lett.
81
, 3001
(2002
).9.
J.
Nelson
, Phys. Rev. B
67
, 155209
(2003
).10.
R.
Osterbacka
, C. P.
An
, X. M.
Jiang
, and Z. V.
Vardeny
, Science
287
, 839
(2000
).11.
G.
Juska
, K.
Genevicius
, K.
Arlauskas
, R.
Osterbacka
, and H.
Stubb
, Phys. Rev. B
65
, 233208
(2002
).12.
P.
Schilinsky
, C.
Waldauf
, and C. J.
Brabec
, Appl. Phys. Lett.
81
, 3885
(2002
).13.
N. W.
Duffy
, L. M.
Peter
, R. M. G.
Rajapakse
, and K. G. U.
Wijayantha
, J. Phys. Chem. B
104
, 8916
(2000
).14.
B. C.
O’Regan
, J. R.
Durrant
, P. M.
Sommeling
, and N. J.
Bakker
, J. Phys. Chem. C
111
, 14001
(2007
).15.
Equation (5) requires the assumption of charge neutrality, i.e., the electron and hole charge densities are equal. The term arises due to the power dependence of in . An alternative formulism for Eq. (5) can be found from considering the shape of the density of states [
J.
Bisquert
and V. S.
Vikhrenko
, J. Phys. Chem. B
108
, 2313
(2004
)].© 2008 American Institute of Physics.
2008
American Institute of Physics
You do not currently have access to this content.
