Novel Conjugated Polymers Containing 3-(2-Octyldodecyl)thieno[3,2-b]thiophene as a π-Bridge for Organic Photovoltaic Applications
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Monomer Syntheses
2.2.1. Synthesis of 3-(2-octyldodecyl)thieno[3,2-b]thiophene (1)
2.2.2. Synthesis of tributyl(6-(2-octyldodecyl)thieno[3,2-b]thiophen-2-yl)stannane (2)
2.2.3. Synthesis of 5,6-difluoro-4,7-bis(6-(2-octyldodecyl)thieno[3,2-b]thiophen-2-yl)benzo[c][1,2,5]thiadiazole (3)
2.2.4. Synthesis of 4,7-bis(5-bromo-6-(2-octyldodecyl)thieno[3,2-b]thiophen-2-yl)-5,6-difluorobenzo[c][1,2,5]thiadiazole (ODTTBT)
2.3. Polymerization Procedure
2.3.1. PT-ODTTBT
2.3.2. PTT-ODTTBT
3. Results and Discussion
3.1. Synthesis and Characterization of Polymers
3.2. Optical and Electrochemical Properties
3.3. Photovoltaic Characteristics
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Conflicts of Interest
References
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Mn (kDa) a | PDIs a | λmax, abs (nm) | λedge (nm) | Egopt (eV) b | EHOMO (eV) c | ELUMO (eV) d | |
---|---|---|---|---|---|---|---|
Film | |||||||
PT-ODTTBT | 82.3 | 1.26 | 437,681 | 752 | 1.65 | -5.48 | -3.83 |
PTT-ODTTBT | 95.1 | 1.25 | 462,688 | 733 | 1.69 | -5.26 | -3.57 |
Voc (V) | Jsc (mA/cm2) | Jcalc. (mA/cm2) | FF (%) | PCE (%) | µh (cm2 v−1 s−1) | |
---|---|---|---|---|---|---|
PT-ODTTBT :PC71BM a | 0.77 (0.77 ± 0.01) | 12.09 (11.98 ± 0.16) | 11.25 | 63.37 (62.13 ± 0.46) | 5.83 (5.77 ± 0.55) | |
PT-ODTTBT :PC71BM b | 0.77 (0.77 ± 0.01) | 12.68 (12.24 ± 0.33) | 12.06 | 63.24 (63.15 ± 0.39) | 6.16 (5.97 ± 0.13) | 2.55 × 10–4 |
PTT-ODTTBT :PC71BM a | 0.75 (0.76 ± 0.01) | 13.13 (12.93 ± 0.18) | 12.75 | 67.88 (68.19 ± 0.38) | 6.70 (6.67 ± 0.04) | |
PTT-ODTTBT :PC71BM b | 0.75 (0.75 ± 0.01) | 13.96 (13.83 ± 0.11) | 13.32 | 66.94 (66.47 ± 0.63) | 7.05 (6.88 ± 0.12) | 7.08 × 10–3 |
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Ha, J.-W.; Park, J.B.; Park, H.J.; Hwang, D.-H. Novel Conjugated Polymers Containing 3-(2-Octyldodecyl)thieno[3,2-b]thiophene as a π-Bridge for Organic Photovoltaic Applications. Polymers 2020, 12, 2121. https://doi.org/10.3390/polym12092121
Ha J-W, Park JB, Park HJ, Hwang D-H. Novel Conjugated Polymers Containing 3-(2-Octyldodecyl)thieno[3,2-b]thiophene as a π-Bridge for Organic Photovoltaic Applications. Polymers. 2020; 12(9):2121. https://doi.org/10.3390/polym12092121
Chicago/Turabian StyleHa, Jong-Woon, Jong Baek Park, Hea Jung Park, and Do-Hoon Hwang. 2020. "Novel Conjugated Polymers Containing 3-(2-Octyldodecyl)thieno[3,2-b]thiophene as a π-Bridge for Organic Photovoltaic Applications" Polymers 12, no. 9: 2121. https://doi.org/10.3390/polym12092121