BTP-eC9

CAS Number 2598965-39-8

Green Energy Materials, Non-Fullerene Acceptors, Organic Conductors

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BTP-eC9, Y series n-type non-fullerene acceptor with NIR absorption

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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.

High efficient non-flullerene acceptor

With highly conjugated core

Expanded absorption range

large dipole moment induced by chloride substituents

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Green energy materials

Processable in non-halogenated solvents

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)	V_OC(V)	J_SC (mA cm^-2)	FF (%)	PCE (%)
100	0.839	26.2	81.1	17.8

Chemical Structure

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.

General Information

CAS Number	2598965-39-8
Chemical Formula	C₈₆H₉₄Cl₄N₈O₂S₅
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 [1]
Solubility	Chloroform, chlorobenzene and dichlorobenzene
Form	Dark blue powder/crystal
Synonyms	eC9, BTP-eC9
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

BTP-eC9 MSDS sheet

Pricing

Batch	Quantity	Price
M2249A1	100 mg	£360
M2249A1	250 mg	£720
M2249A1	500 mg	£1250
M2249A1	1 g	£2300
M2249A1	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. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.