D18
D18, narrow bandgap copolymer with high hole mobility
Higher degree of conjugation than DTBT
D18, also referred to as PCE18, is a narrow bandgap copolymer with a backbone alternating electron donating benzodithiophene (BDT) and electron accepting fused-ring dithienobenzothiadiazole (DTBT) units. With a larger molecular plane structure and higher degree of conjugation from the fused ring DTBT, D18 has a high hole mobility of 1.59 × 10-3 cm2 V-1 s-1.
A device efficiency of 18.22% and certified efficiency of 17.6% have been achieved using D18 as the electron donor and Y6 as an acceptor in a single junction non-fullerene polymer solar cell (NF-PSC) [1].
D18 can also be processed in non-halogenated solvents, i.e. o-xylene, please see our collection of Green Energy Materials.
Device structure: ITO/PEDOT:PSS/D18:Y6 (1:1.6)/PDIN/Ag
| Thickness (nm) | VOC (V) | JSC (mA cm-2) | FF (%) | PCE (%) |
| 103 | 0.859 | 27.7 | 76.6 | 18.22 |
Luminosyn™ D18 (PCE18)
Luminosyn™ D18 (PCE18) is now available.
High purity
D18 (PCE18) is purified via Soxhlet extraction with acetone, hexane, and chlorobenzene under an argon atmosphere
Large quantity orders
Plan your experiments with polymers from the same batch
General Information
| Full name | Poly[(2,6-(4,8-bis(5-(2-ethylhexyl-3-fluoro)thiophen-2-yl)-benzo[1,2-b:4,5-b’]dithiophene))-alt-5,5'-(5,8-bis(4-(2-butyloctyl)thiophen-2-yl)dithieno[3',2':3,4;2'',3'':5,6]benzo[1,2-c][1,2,5]thiadiazole)] |
| Synonyms | PCE18 |
| Chemical formula | (C76H92F2N2S9)n |
| CAS number | 2433725-54-1 |
| HOMO / LUMO | HOMO = -5.51 eV, LUMO = -2.77 eV [1] |
| Solubility | Chloroform, chlorobenzene and dichlorobenzene |
| Processing solvents | o-Xylene, Chloroform, chlorobenzene and dichlorobenzene |
| Classification / Family | Organic semiconducting materials, Medium bandgap polymers, Organic photovoltaics, Polymer solar cells, Perovskite solar cells, Hole-transport layer materials, NF-PSCs, All-polymer solar cells (all-PSCs). |
Chemical Structure
MSDS Documentation
D18 MSDS sheetPricing
| Batch | Quantity | Price |
| M2248A | 100 mg | £420 |
| M2248A | 250 mg | £850 |
| M2248A | 500 mg | £1450 |
| M2248A | 1 g | £2600 |
| M2248A | 5 g / 10 g* | Please contact us for details |
*for 5 - 10 grams order quantity, the lead time is 4-6 weeks.
Batch details
| Batch | Mw | Mn | PDI | Stock Info |
| M2248A1 | 74,586 | 31,378 | 2.38 | Low stock |
| M2248A2 | 63,374 | 33,204 | 1.91 | In stock |
Literature and Reviews
- 18% Efficiency organic solar cells, Q. Liu et al., Sci. Bull., 65, 272 (2020); doi: 10.1016/j.scib.2020.01.001.
- Progress of the key materials for organic solar cells, Y. Tong et al., Sci. China Chem., 63, 758–765 (2020); DOI: 10.1007/s11426-020-9726-0.
- Multi-channel exciton dissociation in D18/Y6 complexes for high-efficiency organic photovoltaics, Z. Cao et al., J. Mater. Chem. A, 8, 20408-20413 (2020); doi: 10.1039/D0TA07996K.
Characterisations
UV-Vis Absorption
Cyclic Voltammetry
The cyclic voltammograms (CV) measurements were recorded on Ossila Potentiostat by using a three-electrode system with platinum disc as the working electrode, platinum wire as the counter electrode, Ag/Ag+ electrode as the reference electrode with a scanning rate of 100 mV/s in a 0.1 M tetrabutylammonium perchlorate (Bu4NClO4) solution. The potential of Ag/Ag+ reference electrode was internally calibrated by using ferrocene/ferroncenium (Fc/Fc+) as the redox couple.
To the best of our knowledge the information provided here is accurate. However, Ossila assume no liability for the accuracy of this page. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. All products are for laboratory and research and development use only, and may not be used for any other purpose including health care, military, pharmaceuticals, cosmetics, food, or commercial applications.