Green Energy Materials, Materials, Non-Fullerene Acceptors, Organic Conductors
BTP-4Cl-12 (CAS number 2447642-41-1), also known as Y7-BO or BO-4Cl, belongs to the highly efficient non-fullerene acceptor Y6 family. The only difference between BTP-4Cl-12 and Y7 is that BTP-4Cl-12 has larger butyloctyl alkyl chains that are attached to the pyrrole rings while Y7 has ethylhexyl alkyl chains at the clove of the U-shaped structure. Also, BTP-4Cl-12 has greater solubility so it has great advantage for solution processability and mass device production with environmentally benign solvents as active layer materials for organic polymer solar cells.
By the method of delayed processing using non-halogenated solvent toluene, optimized nano-fibril like morphology of PM6:BTP-4Cl-12 can be achieved with more efficient charge separation and transport and outstanding device performance efficiency of 17.33% in PCE.
Device structure: (ITO)/PEDOT:PSS/PM6:BTP-4Cl-12:BV/PFN-Br/Al. [1]
| Thickness (nm) | VOC (V) | JSC (mA cm-2) | FF (%) | PCE (%) |
| 110 nm | 0.855 | 26.10 | 77.70 | 17.33 |
| CAS Number | 2447642-41-1 |
|---|---|
| Chemical Formula | C90H102Cl4N8O2S5 |
| Purity | >99% (1H NMR) |
| Full Name | 2,2'-((2Z,2'Z)-((12,13-bis(2-butyloctyl)-3,9-diundecyl-12,13-dihydro-[1,2,5]thiadiazolo[3,4-e]thieno[2",3’':4’,5']thieno[2',3':4,5]pyrrolo[3,2-g]thieno[2',3':4,5]thieno[3,2-b]indole-2,10-diyl)bis(methanylylidene))bis(5,6-dichloro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile |
| Molecular Weight | 1629.96 g/mol |
| Absorption | λmax 836 nm (in film) |
| HOMO / LUMO | HOMO = -5.66 eV, LUMO = -4.09 eV; Eg = 1.39 eV [1] |
| Solubility | Chloroform, chlorobenzene |
| Form | Dark blue powder/crystals |
| Synonyms | BO-4Cl, BTP-BO-4Cl, Y6-BO-4Cl, Y7-BO |
| Classification / Family | 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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