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  • 产品名称：英国Ossila材料BTP-eC9

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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

General Information

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]
Synonyms eC9, BTP-eC9
Chemical formula C86H94Cl4N8O2S5
Molecular weight 1573.89 g/mol
CAS number n.a.
HOMO / LUMO HOMO = -5.64 eV, LUMO = -4.05 eV [1]
Solubility Chloroform, chlorobenzene and dichlorobenzene
Form Dark blue powder/crystal
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.


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