Green Energy Materials, Materials, Non-Fullerene Acceptors, Organic Conductors
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 |
| 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 |
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