|HOMO / LUMO||HOMO = -5.34 eV LUMO = -3.69 eV |
|Solubility/processing solvents||Trimethylbenzene (TMB), chlorobenzene|
|Classification / Family||Benzothiadiazole, Fluorinated benzothiadiazole, Heterocyclic five-membered ring, Organic semiconducting materials, Low band gap polymers, Organic photovoltaics, All polymer solar cells, NFA-polymer solar cells|
Compared to PffBT4T-2OD (PCE11), PffBT4T-C9C13 has larger side chains which help promote better solubility and film morphology. When using PffBT4T-C9C13 as a polymer donor and PC71BM as electron acceptor (with trimethylbenzene (TMB) as host solvent), a higher device performance of 11.7% was achieved .
Due to its broader absorption of the solar spectrum in the visible light region (with an absorption edge at about 800 nm), PffBT4T-C9C13 is also ideal for use as a donor material for all-polymer solar cells and NFA-polymer solar cells
Additionally, its higher solubility means that PffBT4T-C9C13 can be processed with non-halogenated solvents. There are great opportunities with this polymer for inkjet printing on an industrial scale - an environment-friendly approach for alternative renewable energy.
Literature and Reviews
Towards a bright future: polymer solar cells with power conversion
efficiencies over 10%, Z Hu et al., Sci. China Chem, 60 (5), 571-582 (2017); doi: 10.1007/s11426-016-0424-9.
- Efficient organic solar cells processed from hydrocarbon solvents, J. Zhao et al, Nat. Energy 1, 15027 (2016); doi:10.1038/nenergy.2015.27.