Supplemental Material
Enhanced performance for polymer/fullerene solar cells by using
bromobenzene/1,8-diiodooctane co-solvent
Xiaodong Huang, Jun Peng, Kunyuan Lu, Zeke Liu, Zhongwei Wu, Jianyu Yuan,
Jialing Lu, Hai-Qiao Wanga) and Wanli Maa)
Institute of Functional Nano & Soft Materials (FUNSOM) & Collaborative
Innovation Center of Suzhou Nano Science and Technology, Soochow
University,199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123,
China
a)
Electronic mail: hqwang@suda.edu.cn and wlma@suda.edu.cn.
Table S1. The detailed parameters of P3HT:PCBM polymer solar cells with CB, BrB
and IB as the host solvents W/O DIO.
Solvent
DIO
Voc
Jsc
FF
PCE
Volume
(V)
(mA/cm2)
(%)
(%)
CB
0
0.67
3.05
37.1
0.76
CB
0.5%
0.58
8.92
50.8
2.63
CB
1%
0.58
9.24
52.1
2.79
CB
2%
0.57
9.25
49.3
2.60
BrB
0
0.69
3.40
38.4
0.90
BrB
0.5%
0.59
8.23
58.0
2.82
BrB
1%
0.57
9.00
62.0
3.18
BrB
2%
0.57
8.45
63.2
3.04
IB
0
0.62
3.68
32.1
0.73
IB
0.5%
0.58
8.60
40.0
1.98
IB
1%
0.57
8.26
46.0
2.16
IB
2%
0.57
8.78
40.4
2.02
o-DCB
0
0.66
4.94
61.6
2.01
o-DCB
1%
0.57
8.77
59.7
2.98
BrF
0
0.56
0.92
27.8
0.14
BrF
1%
0.32
2.54
43.3
0.35
Table S2. The boiling point of each solvent and the solubility of P3HT and PCBM in
these solvents. The solubility data of CB, BrB, BrF and o-DCB are obtained from
reference1, while the data of IB is measured with the same method.
Solvent
Boiling point (oC)
P3HT (mg/ml)
PCBM (mg/ml)1
CB
131
15.9
59.5
BrF
149
1.5
>165
BrB
156
84.1
30.8
o-DCB
180
14.7
42.1
IB
188
4.6
35.3
Figure S1. XRD of P3HT:PCBM blend film cast from CB, BrB and IB with or
without DIO.
Figure S2. Structure of PT12,2 PTF83 and PBDT-T-FDP.4
Table S3. Device parameters for PT12:PCBM in different solvent systems with or
without 2% DIO.
Solvents
Voc (V)
Jsc (mA/cm2)
FF (%)
PCE (%)
Polymer
Solubility
CB
0.88
2.04
33.2
0.59
CB/DIO
0.93
6.00
37.2
2.06
BrB
0.96
4.03
46.2
1.79
BrB/DIO
0.93
6.38
49.2
2.92
IB
0.05
1.43
36.3
0.03
IB/DIO
0.01
0.16
-
0.00
o-DCB
0
1.39
-
0.00
o-DCB/DIO
0
1.63
-
0.00
Good
Good
Poor
Poor
Table S4. Device parameters for PTF8:PCBM in different solvent systems with or
without 2% DIO.
Solvents
Voc (V)
Jsc (mA/cm2)
FF (%)
PCE (%)
Polymer
Solubility
CB
0.84
7.12
50.0
2.98
CB/DIO
0.88
8.19
53.0
3.80
BrB
0.90
7.31
55.4
3.65
BrB/DIO
0.89
7.74
64.9
4.44
IB
0.56
3.54
44.1
0.88
IB/DIO
0.60
3.44
53.2
1.10
o-DCB
0.84
7.38
61.2
3.81
o-DCB/DIO
0.82
8.76
60.2
4.32
Good
Good
Poor
Good
Table S5. Device parameters for PBDT-T-FDP:PCBM in different solvent systems
with or without 2% DIO.
Solvents
Voc (V)
Jsc (mA/cm2)
FF (%)
PCE (%)
Polymer
Solubility
CB
0.76
10.78
47.3
3.87
CB/DIO
0.75
10.75
58.6
4.72
BrB
0.76
8.38
49.8
3.18
BrB/DIO
0.74
8.48
50.8
3.19
IB
0.61
4.24
43.5
1.12
IB/DIO
0.61
5.16
43.0
1.35
Good
Medium
Poor
o-DCB
0.75
8.05
54.4
3.30
o-DCB/DIO
0.74
6.95
57.9
2.97
Medium
Reference:
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4
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