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Product Code M2248A2-100mg
Price £460 ex. VAT

D18, narrow bandgap copolymer with high hole mobility

Higher degree of conjugation than DTBT

Specifications | Pricing and Options | MSDS | Literature and Reviews

D18 (CAS number 2433725-54-1), 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.

Narrow bandgap copolymer

Narrow bandgap copolymer

For high efficient OPV applications



High purity, batch-specific GPC data, available larger batch orders and higher molecular weight

Worldwide shipping for 2433725-54-1

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Green energy material

Green energy materials

Processable in non-halogenated solvents

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

CAS Number 2433725-54-1
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)]
Chemical Formula (C76H92F2N2S9)n
HOMO / LUMO HOMO = -5.51 eV, LUMO = -2.77 eV [1]
Solubility Chloroform, chlorobenzene and dichlorobenzene
Processing Solvents  Chloroform, chlorobenzene and dichlorobenzene
Synonyms PCE18
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


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).

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.


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

MSDS Documentation

D18 MSDSD18 MSDS Sheet

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.
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