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 (%)|
|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 |
|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.|
|M2249A1||5 g / 10 g*||Please contact us for details|
*for 5 - 10 grams order quantity, the lead time is 4-6 weeks.
Literature and Reviews
- Single-Junction Organic Photovoltaic Cells with Approaching 18% Efficiency, Y. Cui et al., Adv. Mater., 32 (19), 1908205 (2020); DOI: 10.1002/adma.201908205.
- 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.
- Chlorination: An Effective Strategy for High-Performance. Organic Solar Cells, Q. Zhao et al., Adv. Sci., 7, 2000509 (2020); DOI: 10.1002/advs.202000509.
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