SUPPORTING INFORMATION
Thiophene π Bridge Effect on Bulky Side Chained Benzodithiophene
based Photovoltaic Polymers
Ruiying Sheng,1,2* Qian Liu,1,2* Weiye Chen,1,2 Mingliang Sun,1 Huilin Zheng,1, Jing
Ren,1 Renqiang Yang 2
1Institute
of Materials Science and Engineering, Ocean University of China, Qingdao
266100, People’s Republic of China
2CAS
Key Laboratory of Bio-based Materials, Qingdao Institute of Bioenergy and
Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, People’s
Republic of China
* These authors contribute equally
Correspondence to: M.L.S. (E-mail: mlsun@ouc.edu.cn) or R.Q.Y. (E-mail:
yangrq@qibebt.ac.cn)
Synthesis
Compound 2 and 4 were synthesized according to the corresponding literature.1-4
1
H NMR spectra of compound 2: 1H NMR (600 MHz, CDCl3), d (ppm): δ 7.66 (d, J = 4.0 Hz, 2H),
7.08 (d, J = 4.0 Hz, 2H), 3.65 (d, J = 7.4 Hz, 2H), 1.68–1.65 (m, 2H), 1.36-1.24 (m, 10H), 0.86 (t, J =
7.2 Hz, 3H).
1
H NMR spectra of compound 4: 1H NMR (600 MHz, CDCl3), d (ppm): δ 7.85 (s, 1H), 7.05 (t, J = 3.9
Hz, 2H), 7.03 (d, J = 3.9 Hz, 1H), 6.99 (d, J = 3.9 Hz, 1H), 4.34 (t, J = 6.8 Hz, 2H), 1.80–1.77 (m, 2H),
1.40–1.28 (m, 10H), 0.89 (t, J = 6.9 Hz, 3H).
Table S1 Photovoltaic Properties of the PSCs based on the Blend of Polymers and PC71BM with
thermal annealing at 90 ℃
Polymer
Rotio[A:D]
P1
1：2
P2
1：2
P3
1：1.5
P4
1：1.5
VOC[V]
0.87
0.90
0.91
0.77
JSC [mA/cm2]
1.70
6.11
3.71
7.13
FF[%]
33.09
39.94
42.67
48.47
PCE[%]
0.49
2.21
1.45
2.65
Table S2 The JSC calibration data to confirm the accuracy of the photovoltaic measurements
polymer
P1
P2
P3
P4
the J–V measurements (mA/cm2)
2.13
5.96
4.00
7.07
the integration of the EQE curves (mA/cm2)
1.96
5.75
3.84
6.84
Figure S1 DSC curves of the four polymers.
Figure S2 J–V characteristics of the polymers:PC71BM with thermal annealing at 90 ℃ with
different blend ratio (1:2 for P1 and P2 and 1:1.5 for P3 and P4) under the illumination of AM
1.5G, 100 mW/cm2.
Reference
1. Huo, L.; Zhang, S.; Guo, X.; Xu, F.; Li, Y.; Hou, J. Angew. Chem. Int. Ed. 2011, 50, 9697-9702.
2. Zhang, M.; Guo, X.; Zhang, S.; Hou, J. Adv. Mater. 2014, 26, 1118-1123.
3. Najari, A.; Beaupré, S.; Berrouard, P.; Zou, Y.; Pouliot, J.-R.; Lepage-Pérusse, C.; Leclerc, M. Adv.
Funct. Mater. 2011, 21, 718-728.
4. Huang, Y.; Guo, X.; Liu, F.; Huo, L.; Chen, Y.; Russell, T. P.; Han, C. C.; Li, Y.; Hou, J. Adv. Mater.
2012, 24, 3383-3389.