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General Information
| Full name | Poly[[5,6-difluoro-2-(2-hexyldecyl)-2H-benzotriazole-4,7-diyl]-2,5-thiophenediyl[4,8-bis[5-(tripropylsilyl)-2-thienyl]benzo[1,2-b:4,5-b']dithiophene-2,6-diyl]-2,5-thiophenediyl] |
| Synonyms | J71 |
| CAS number | 2035466-89-6 |
| Chemical formula | (C66H85F2N3S6Si2)n |
| Molecular weight | See Batch Details table above |
| HOMO / LUMO | HOMO = - 5.40 eV, LUMO = - 3.24 eV [1] |
| Solubility |
M2056A1: Dichlorobenzene at elevated temperature ca. 110°C; M2056A2: Chloroform, chlorobenzene and dichlorobenzene |
| Classification / Family | Benzodithiophene, BDT, Benzotriazole, Heterocyclic five-membered ring, Organic semiconducting materials, medium band-gap polymers, Organic photovoltaics, All-polymer solar cells, OFETs, Photodetectors |
Applications
PJ71, BDTT-FBTA back-boned donor-acceptor type polymer semiconductor, with tripropylsilyl substituents on thiophene groups that are conjugated side chains to the BDTT unit, it further down-shifts the HOMO energy level and thus increases the bandgap of the polymer (Eg = 2.16 eV).
The Si-binding atoms also have a significant effect on the crystallinity of the polymer thus the morphology of the device film due to the longer C–Si bond length compared with the C–C bond, giving the rise of stronger π-π stackings between each polymer chains.
Like PJ61, PJ71 is used for high efficiency polymer solar cells applications especially with ITIC series as NFAs.
Literature and Reviews
- 11.4% Efficiency non-fullerene polymer solar cells with trialkylsilyl substituted 2D-conjugated polymer as donor, H. Bin et al., Nat. Commun., 7, 13651 (2016); doi:10.1038/ncomms13651.
- A near-infrared non-fullerene electron acceptor for high performance polymer solar cells, Y. Li et al., Energy Environ. Sci., 10, 1610 (2017); DOI: 10.1039/c7ee00844a.
- Medium Bandgap Polymer Donor Based on Bi(trialkylsilylthienyl-benzo[1,2-b:4,5-b′]-difuran) for High Performance Nonfullerene Polymer Solar Cells, H. Bin et al., Adv. Energy Mater., 1700746 (2017); DOI: 10.1002/aenm.201700746.