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Product Code M2304A1-50mg
Price £260 ex. VAT

L8-BO, non-fullerene acceptor for polymer solar cells

For high carrier generation and balanced charge transport

Specifications | Pricing and Options | MSDS | Literature and Reviews

L8-BO (CAS number 2668341-40-8) has a similar structure to the highly efficient Y6 non-fullerene acceptor with a fused thienothienopyrrolo-thienothienoindole (TTP-TTI) core. The only difference between L8-BO and Y6 is that L8-BO has two butyloctyl side chains attached to the core while Y6 has two undecyl side chains. The branched 2-butyloctyl side chains show great improvement in film while comparing with Y6 with better structural order to achieve an optimized, multi-length-scale film morphology. High carrier generation, low charge recombination rates and balanced charge transport can be expected.

High efficient non-flullerene acceptor

High efficient non-flullerene acceptor

With highly conjugated core

Improved film quanlity

Improved film quanlity

Owing to the branched butyloctyl side chain

Worldwide shipping

Worldwide shipping

Quick and reliable shipping

High purity

High purity

>99% pure

It has been reported that single-junction non-fullerene polymer solar cells with L8-BO as the acceptor and PBDB-T-2F (PM6) as the polymer has achieved photo conversion efficiency (PCE) over 18% with the following device structure.

Device structure: ITO/PEDOT:PSS/PM6:L8-BO (1:1.2)/PNDIT-F3N/Ag

Thickness (nm) VOC (V) JSC (mA cm-2) FF (%) PCE (%)
100 0.874 25.72 81.5 18.32

General Information

CAS Number 2668341-40-8
Chemical Formula C84H90F4N8O2S5
Purity >99% (1H NMR)
Full Name 2,2'-((2Z,2'Z)-((12,13-bis(2-ethylhexyl)-3,9-(2-butyloctyl)-12,13-dihydro-[1,2,5]thiadiazolo[3,4-e]thieno[2",3’':4’,5']thieno[2',3':4,5]pyrrolo[3,2-g]thieno[2',3':4,5]thieno[3,2-b]indole-2,10-diyl)bis(methanylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile
Molecular Weight 1479.98 g/mol
HOMO / LUMO HOMO = -5.68 eV, LUMO = -3.90 eV [1]
Solubility Chloroform, chlorobenzene and dichlorobenzene
Form Dark blue powder/crystal
Synonyms L8BO, L8-BO-2F
Classification / Family BTP series 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.

Chemical Structure

chemical structure L8-BO
Chemical structure of L8-BO, highly efficient non-fullerene acceptor

MSDS Documentation

L8-BO MSDS sheetL8-BO MSDS sheet


Batch Quantity Price
M2304A1 50 mg £260
M2304A1 100 mg £400
M2304A1 250 mg £800
M2304A1 500 mg £1450
M2304A1 1 g £2500
M2304A1 5 g / 10 g* Please contact us for details

*for 5 – 10 grams order quantity, the lead time is 4 – 6 weeks

Literature and Reviews

  1. Non-fullerene acceptors with branched side chains and improved molecular packing to exceed 18% efficiency in organic solar cells, C. Li et al., Nat. Energy, 6, 605–613 (2021); DOI: 10.1038/s41560-021-00820-x.
  2. High-efficiency organic solar cells with low voltage loss induced by solvent additive strategy, J. Song et al., Matter, 4 (7), 2542-2552 (2021); DOI: 10.1016/j.matt.2021.06.010.
  3. 18.77 % Efficiency Organic Solar Cells Promoted by Aqueous Solution Processed Cobalt(II) Acetate Hole Transporting Layer, H. Meng et al., Angew. Chem, 133 (41); 22728-22735 (2021); DOI: 10.1002/ange.202110550.
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