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Ramoroka ME, Mdluli SB, John-Denk VS, Modibane KD, Arendse CJ, Iwuoha EI. Synthesis and Photovoltaics of Novel 2,3,4,5-Tetrathienylthiophene-co-poly(3-hexylthiophene-2,5-diyl) Donor Polymer for Organic Solar Cell. Polymers (Basel) 2020; 13:E2. [PMID: 33374983 PMCID: PMC7792595 DOI: 10.3390/polym13010002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 12/04/2020] [Accepted: 12/08/2020] [Indexed: 12/27/2022] Open
Abstract
This report focuses on the synthesis of novel 2,3,4,5-tetrathienylthiophene-co-poly(3-hexylthiophene-2,5-diyl) (TTT-co-P3HT) as a donor material for organic solar cells (OSCs). The properties of the synthesized TTT-co-P3HT were compared with those of poly(3-hexylthiophene-2,5-diyl (P3HT). The structure of TTT-co-P3HT was studied using nuclear magnetic resonance spectroscopy (NMR) and Fourier-transform infrared spectroscopy (FTIR). It was seen that TTT-co-P3HT possessed a broader electrochemical and optical band-gap as compared to P3HT. Cyclic voltammetry (CV) was used to determine lowest unoccupied molecular orbital (LUMO) and highest occupied molecular orbital (HOMO) energy gaps of TTT-co-P3HT and P3HT were found to be 2.19 and 1.97 eV, respectively. Photoluminescence revealed that TTT-co-P3HT:PC71BM have insufficient electron/hole separation and charge transfer when compared to P3HT:PC71BM. All devices were fabricated outside a glovebox. Power conversion efficiency (PCE) of 1.15% was obtained for P3HT:PC71BM device and 0.14% was obtained for TTT-co-P3HT:PC71BM device. Further studies were done on fabricated OSCs during this work using electrochemical methods. The studies revealed that the presence of poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) on the surface of indium tin oxide (ITO) causes a reduction in cyclic voltammogram oxidation/reduction peak current and increases the charge transfer resistance in comparison with a bare ITO. We also examined the ITO/PEDOT:PSS electrode coated with TTT-co-P3HT:PC71BM, TTT-co-P3HT:PC71BM/ZnO, P3HT:PC71BM and P3HT:PC71BM/ZnO. The study revealed that PEDOT:PSS does not completely block electrons from active layer to reach the ITO electrode.
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Affiliation(s)
- Morongwa E. Ramoroka
- SensorLab (University of the Western Cape Sensor Laboratories), Chemical Sciences Building, Robert Sobukwe Road, Bellville, Cape Town 7535, South Africa; (M.E.R.); (S.B.M.)
| | - Siyabonga B. Mdluli
- SensorLab (University of the Western Cape Sensor Laboratories), Chemical Sciences Building, Robert Sobukwe Road, Bellville, Cape Town 7535, South Africa; (M.E.R.); (S.B.M.)
| | - Vivian S. John-Denk
- SensorLab (University of the Western Cape Sensor Laboratories), Chemical Sciences Building, Robert Sobukwe Road, Bellville, Cape Town 7535, South Africa; (M.E.R.); (S.B.M.)
| | - Kwena D. Modibane
- Department of Chemistry, School of Physical and Mineral Science, University of Limpopo, Sovenga, Polokwane 0727, South Africa;
| | - Christopher J. Arendse
- Department of Physics and Astronomy, University of the Western Cape, Bellville, Cape Town 7535, South Africa;
| | - Emmanuel I. Iwuoha
- SensorLab (University of the Western Cape Sensor Laboratories), Chemical Sciences Building, Robert Sobukwe Road, Bellville, Cape Town 7535, South Africa; (M.E.R.); (S.B.M.)
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Bilal Ahmed Siddique M, Hussain R, Ali Siddique S, Yasir Mehboob M, Irshad Z, Iqbal J, Adnan M. Designing Triphenylamine‐Configured Donor Materials with Promising Photovoltaic Properties for Highly Efficient Organic Solar Cells. ChemistrySelect 2020. [DOI: 10.1002/slct.202001989] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
| | - Riaz Hussain
- Department of Chemistry University of Okara Okara 56300 Pakistan
| | | | | | - Zobia Irshad
- Graduate School, Department of Chemistry Chosun University Gwangju 501-759 R. O. Korea
| | - Javed Iqbal
- Department of Chemistry University of Agriculture 38000 Faisalabad Pakistan
| | - Muhammad Adnan
- Graduate School, Department of Chemistry Chosun University Gwangju 501-759 R. O. Korea
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