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Product Code M2248A2-100mg
Price $575 ex. VAT

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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

d18, pce18, CAS# 2433725-54-1
Chemical structure of D18 (PCE18), CAS No. 2433725-54-1

MSDS Documentation

D18 MSDSD18 MSDS sheet


Batch Quantity Price
M2248A 100 mg £460
M2248A 250 mg £950
M2248A 500 mg £1600
M2248A 1 g £2900
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 Discontinued
M2248A2 63,374 33,204 1.91 In stock

Literature and Reviews

  1. 18% Efficiency organic solar cells, Q. Liu et al., Sci. Bull., 65, 272 (2020); doi: 10.1016/j.scib.2020.01.001.
  2. 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.
  3. 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.


UV-Vis Absorption

polymer d18 uv-vis absorption in film
UV-Vis absorption of of D18 in film (as-cast film from chlorobenzene on glass) and its solubility in o-xylene at 8 mg/ml.

Cyclic Voltammetry

polymer d18 cyclic voltammetry in film and its solubility in o-xylene
Cyclic voltammograms of the D18 film on platinum electrode in 0.1M Bu4NClO4 in acetonitrile at a scan rate of 100 mV s−1.

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/Agelectrode 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. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. 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.

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