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L8-BO, L8-BO-2F

Product Code M2304A1
Price $300.00 ex. VAT

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

For high carrier generation and balanced charge transport

L8-BO 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.

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

Chemical Structure

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

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.
  4. Branched side chains improve molecular packing of non-fullerene acceptors, N. Li et al., Sci. China Chem, 64, pages 1435–1436 (2021); DOI: 10.1007/s11426-021-1034-4.

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 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.

MSDS Documentation

L8-BO MSDS sheetL8-BO MSDS sheet


Batch Quantity Price
M2304A1 50 mg £240
M2304A1 100 mg £360
M2304A1 250 mg £720
M2304A1 500 mg £1300
M2304A1 1 g £2300
M2304A1 5 g / 10 g* Please contact us for details

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

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, pharmaceuticals, cosmetics, food or commercial applications.

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