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Green Energy Materials, Non-Fullerene Acceptors

Product Code M2249A1-100mg
Price $450 ex. VAT

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BTP-eC9, Y series n-type non-fullerene acceptor with NIR absorption

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BTP-eC9 is a family member of the Y series of n-type non-fullerene semiconducting acceptors. It has been proven that these NFAs can achieve high device performance in non-fullerene polymer solar cells (NF-PSCs).

With a fused thienothienopyrrolo-thienothienoindole (TTP-TTI) core, BTP-eC9 is a modified version of Y7 but with better solubility. Comparing to Y6, chlorination at the peripheral end-groups can efficiently lower HOMO/LUMO energy levels. C–Cl bond also has a large dipole moment, expanding the absorption range further to near infrared (NIR) region.

A device efficiency approaching 18% has been reported using BTP-eC9 as the electron acceptor and PBDB-T-2F (PM6) as electron donor in single junction organic photovoltaic cells.

Device structure: ITO/PEDOT:PSS/PBDB-T-2F:BTP-eC9 (1:1.2)/PFN-Br/Al

Thickness (nm) VOC (V) JSC (mA cm-2) FF (%) PCE (%)
100 0.839 26.2 81.1 17.8

Chemical Structure

BTP-eC9 chemical structure
Chemical structure of BTP-eC9

Literature and Reviews

  1. Single-Junction Organic Photovoltaic Cells with Approaching 18% Efficiency, Y. Cui et al., Adv. Mater., 32 (19), 1908205 (2020); DOI: 10.1002/adma.201908205.
  2. Self-assembled Monolayer Enables Hole Transport Layer-Free Organic Solar Cells with18% Efficiency and Improved Operational Stability, Y. Lin et al., ACS Energy Lett., 5, 9, 2935–2944 (2020); DOI: 10.1021/acsenergylett.0c01421.
  3. Chlorination: An Effective Strategy for High-Performance. Organic Solar Cells, Q. Zhao et al., Adv. Sci., 7, 2000509 (2020); DOI: 10.1002/advs.202000509.

General Information

CAS Number 2598965-39-8
Chemical Formula C86H94Cl4N8O2S5
Full Name 2,2'- [[12,13-Bis(2-butyloctyl)-12,13-dihydro-3,9-dinonylbisthieno[2'',3'':4',5']thieno[2',3':4,5]pyrrolo[3,2-e:2',3'-g][2,1,3]benzothiadiazole-2,10-diyl]bis[methylidyne(5,6-chloro-3-oxo-1H-indene-2,1(3H)-diylidene) ]]bis[propanedinitrile]
Molecular Weight 1573.89 g/mol
HOMO / LUMO HOMO = -5.64 eV, LUMO = -4.05 eV [1]
Solubility Chloroform, chlorobenzene and dichlorobenzene
Form Dark blue powder/crystal
Synonyms eC9, BTP-eC9
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

BTP-eC9 MSDS SheetBTP-eC9 MSDS sheet


Batch Quantity Price
M2249A1 100 mg £360
M2249A1 250 mg £720
M2249A1 500 mg £1250
M2249A1 1 g £2300
M2249A1 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. 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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