FBR molecule, NFA which reduces the tendency of crystallization
Used to achieve one of the highest open voltages for polymer organic solar cells
Specifications | Pricing and Options | MSDS | Literature and Reviews
FBR (CAS number 1644381-95-2) having a similar AA-D-AA type structure to IDFBR, contains electron-donating alkylated fluorene as the core, flanked by electron withdrawing benzothiadiazole (BT) and 3-ethylrhodanine units on the periphery terminals.
FBR reduces the tendency of crystallization and helps to prevent the formation of large crystalline domains in the BHJ donor/acceptor blend composition leading to better device performance efficiency and longer life-times.
Comparing to PC71BM, FBR has a relatively high lowest unoccupied molecular orbital (LUMO) which in theory should give a higher open voltage (Voc). This is indeed the case for polymer organic solar cells with PffBT4T-2DT as the polymer donor and FBR as the electron acceptor, yielding a device performance efficiency over 7.8% with an open voltage of 1.12 eV. This is one of the highest achieved open voltages for polymer organic solar cells.
Device structure: ITO/ZnO/PffBT4T-2DT:FBR/MoOx/Ag [1]
| Thickness (nm) | VOC (V) | JSC (mA cm-2) | FF (%) | PCE (%) |
| 120 | 1.12 | 11.5 | 61 | 7.8 |
General Information
| CAS Number | 1644381-95-2 |
|---|---|
| Chemical Formula | C53H56N6O2S6 |
| Purity | >98% (1H NMR) |
| Full Name | 5,5′-[(9,9-Dioctyl-9H-fluorene-2,7-diyl)bis(2,1,3-benzothiadiazole-7,4-diylmethylidyne)]bis[3-ethyl-2-thioxo-4-thiazolidinone] |
| Molecular Weight | 1001.44 g/mol |
| Absorption* | λmax 510 nm (Film) |
| HOMO / LUMO | HOMO = -5.83 eV, LUMO = -3.75 eV [1] |
| Solubility | Chloroform, chlorobenzene |
| Form | Red powder/crystals |
| Synonyms | (5Z,5'Z)-5,5'-((7,7'-(9,9-dioctyl-9H-fluorene-2,7-diyl)bis(benzo[c][1,2,5]thiadiazole-7,4-diyl))bis(methanylylidene))bis(3-ethyl-2-thioxothiazolidin-4-one) |
| Classification / Family | NFAs, n-type non-fullerene electron acceptors, Organic semiconducting materials, Low band-gap small molecule, Small molecular acceptor, Organic photovoltaics, Polymer solar cells, NF-PSCs. |
*Measurable with the Ossila USB Spectrometer, see more on Spectrometers and Spectroscopy Accessories.
Chemical Structure
Pricing
| Batch | Quantity | Price |
|---|---|---|
| M2242A1 | 100 mg | £270 |
| M2242A1 | 250 mg | £540 |
| M2242A1 | 500 mg | £960 |
| M2242A1 | 1 g | £1760 |
MSDS Documentation
FBR MSDS SheetLiterature and Reviews
- Reduced voltage losses yield 10% efficient fullerene free organic solar cells with >1 V open circuit voltages, D. Baran et al., Energy Environ. Sci., 9, 3783--3793 (2016); DOI: 10.1039/c6ee02598f.
- A Rhodanine Flanked Nonfullerene Acceptor for Solution-Processed Organic Photovoltaics, S. Holliday et al., J. Am. Chem. Soc., 137, 2, 898–904 (2015); doi: 10.1021/ja5110602.
- Critical review of the molecular design progress in non-fullerene electron acceptors towards commercially viable organic solar cells, A. Wadsworth et al., Chem. Soc. Rev., 48, 1596 (2019); DOI: 10.1039/c7cs00892a.
Related Products
Non-Fullerene Acceptors
Non-fullerene acceptors (NFAs) are a promising alternative to fullerene-based electron acceptors.
Semiconducting Polymers
Semiconducting polymers for bulk heterojunction, OPV, OLED, OFET and perovskite interfaces and solar cell research.
Organic Conductors
Organic conductors are an environmentally friendly alternative to traditional inorganic conductors.