FREE shipping to on qualifying orders when you spend or more. All prices ex. VAT.


Product Code M2301A1
Price $413.00 ex. VAT

eC9-2Cl for devices with efficiencies approaching 19%

Sister compound to BTP-eC9, available from £330

eC9-2Cl is another highly efficient non-fullerene acceptor that belongs to the Y6 acceptors family. With a fused thienothienopyrrolo-thienothienoindole (TTP-TTI) core, eC9-2Cl is a sister compound to BTP-eC9 with two less chlorine atoms on the peripheral benzene end groups. Comparing to BTP-eC9, the absorption of eC9-2Cl is blue shifted for about 20 nm at its maximum absorption with elevated HOMO/LUMO energy levels.

Device efficiency approaching 19% (certified value of 18.7%) has been achieved by using PBQx-TF as the polymer donor and eC9-2Cl and F-BTA3 as a mixed electron acceptors in single junction organic photovoltaic cells.

Device structure: ITO/PEDOT:PSS/PBQx-TF:eC9-2Cl:F-BTA3 (1:1.2:0.2)/PNDIT-F3N-Br/Al

Thickness (nm) VOC (V) JSC (mA cm-2) FF (%) PCE (%)
100 0.879 26.7 80.9 19.0

Chemical Structure

eC9-2Cl chemical structure, non-fullerene acceptors
Chemical structure of eC9-2Cl, non-fullerene acceptor

Literature and Reviews

  1. Single-Junction Organic Photovoltaic Cell with 19% Efficiency, Y Cui et al., Adv. Mater., 2102420 (2021); DOI: 10.1002/adma.202102420..
  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 N/A
Chemical Formula C86H96Cl2N8O2S5
Purity ≥98% (1H NMR)
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(2 or 3-chloro-3-oxo-1H-indene-2,1(3H)-diylidene) ]]bis[propanedinitrile]
Molecular Weight 1504.96 g/mol
HOMO / LUMO HOMO = -5.57 eV, LUMO = -3.74 eV [1]
Solubility Chloroform, chlorobenzene and dichlorobenzene
Form Dark blue powder/crystal
Synonyms BTP-eC9-2Cl, eC9-Cl
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

eC9-2Cl MSDS SheeteC9-2Cl MSDS sheet


Batch Quantity Price
M2301A1 100 mg £330
M2301A1 250 mg £660
M2301A1 500 mg £1150
M2301A1 1 g £2100
M2301A1 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.

Return to the top