We integrate the electro-attractive conjugated molecule tetrafluoro-tetracyano-quinodimethane (F4TCNQ) in the active layer of polymer-CdSe colloidal quantum dot (cQD) solar cells. The addition of this molecule enhances cQD dispersion inside the polymer. In tuning its concentration, we can optimize the active layer morphology for charge separation and transport. A smoother morphology is likely the result of polymer chain adsorption on cQDs via F4TCNQ which increases the steric barrier between cQDs. Our most optimized device has a F4TCNQ:cQDs weight ratio of 0.5% improving the power conversion efficiency by a factor ∼2.3.

1.
N. C.
Greenham
,
X.
Peng
, and
A. P.
Alivisatos
,
Phys. Rev. B
54
,
17628
(
1996
).
2.
D. S.
Ginger
and
N. C.
Greenham
,
J. Appl. Phys.
87
,
1361
(
2000
).
3.
W.
Huynh
,
J. J.
Dittmer
, and
A. P.
Alivisatos
,
Science
295
,
2425
(
2002
).
4.
W.
Huynh
,
J. J.
Dittmer
,
W.
Libby
,
G.
Whiting
, and
A. P.
Alivisatos
,
Adv. Funct. Mater.
13
,
73
(
2003
).
5.
B.
Sun
and
N. C.
Greenham
,
Phys. Chem. Chem. Phys.
8
,
3557
(
2006
).
6.
B.
Sun
,
H. J.
Snaith
,
A. S.
Dhoot
,
S.
Westenhoff
, and
N. C.
Greenham
,
J. Appl. Phys.
97
,
014914
(
2005
).
7.
I.
Gur
,
N. A.
Fromer
,
C.
Chen
,
A. G.
Kanaras
, and
A. P.
Alivisatos
,
Nano Lett.
7
,
409
(
2007
).
8.
S.
Kumar
and
G. D.
Scholes
,
Microchim. Acta
160
,
315
(
2007
).
9.
B. R.
Saunders
and
M. L.
Turner
,
Adv. Colloid. Interface Sci.
138
,
1
(
2008
).
10.
D.
Aldakov
,
F.
Chandezon
,
R. D.
Bettignies
,
M.
Firon
,
P.
Reiss
, and
A.
Pron
,
Eur. Phys. J.: Appl. Phys.
36
,
5
(
2006
).
11.
J.
Olson
,
G.
Gray
, and
S.
Carter
,
Sol. Energy Mater. Sol. Cells
93
,
519
(
2009
).
12.
K.
Yim
,
G. L.
Whiting
,
C. E.
Murphy
,
J. J. M.
Halls
,
J. H.
Burroughes
,
R. H.
Friend
, and
J.
Kim
,
Adv. Mater.
20
,
3319
(
2008
).
13.
J. Z.
Zhang
and
A. B.
Ellis
,
J. Phys. Chem.
96
,
2700
(
1992
).
14.
C. R.
Bullen
and
P.
Mulvaney
,
Nano Lett.
4
,
2303
(
2004
).
15.
B. T.
de Villers
,
C. J.
Tassone
,
S. H.
Tolbert
, and
B. J.
Schwartz
,
J. Phys. Chem. C
113
,
18978
(
2009
).
16.
H.
Hoppe
and
N. S.
Sariciftci
,
J. Mater. Chem.
16
,
45
(
2006
).
17.
M.
Reyes-Reyes
,
K.
Kim
, and
D. L.
Carroll
,
Appl. Phys. Lett.
87
,
083506
(
2005
).
18.
A. J.
Moulé
,
J. B.
Bonekamp
, and
K.
Meerholz
,
J. Appl. Phys.
100
,
094503
(
2006
).
19.
I.
Lokteva
,
N.
Radychev
,
F.
Witt
,
H.
Borchert
,
J.
Parisi
, and
J.
Kolny-Olesiak
,
J. Phys. Chem. C
114
,
12784
(
2010
).
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