FREE shipping to on qualifying orders when you spend or more, processed by Ossila BV. All prices ex. VAT. Qualifying orders ship free worldwide! Fast, secure, and backed by the Ossila guarantee. It looks like you are visiting from , click to shop in or change country. Orders to the EU are processed by our EU subsidiary.

It looks like you are using an unsupported browser. You can still place orders by emailing us on, but you may experience issues browsing our website. Please consider upgrading to a modern browser for better security and an improved browsing experience.


CAS Number 2703920-28-7

Materials, Non-Fullerene Acceptors

Product Code M2350A1-50mg
Price £260 ex. VAT

ZY-4Cl, non-fullerene acceptor and Y6 family member

With an increased LUMO energy level, giving higher open voltage

Specifications | Pricing and Options | MSDS | Literature and Reviews

ZY-4Cl (CAS number 2703920-28-7), a modified version of BTP-4Cl-12, belongs to the Y6 non-fullerene acceptors family with a fused thienothienopyrrolo-thienothienoindole (TTP-TTI) core and 5,6-dichloro-1H-indene-1,3(2H)-dione peripheral end groups.

The replacement of the cyano groups with carbonyl groups significantly increases the LUMO energy level of ZY-4Cl due to the reduced electron-withdrawing effect of the carbonyl groups, giving higher open voltage (VOC) however sacrificing its light absorption capability in the NIR region. The modification of the structure also reduces the miscibility between the polymer donor, i.e. P3HT and ZY-4Cl, which improves the phase separation morphology of the P3HT:ZY-4Cl-based active layer for efficient charge transport with reduced charge recombination. 

ZY-4Cl can also be added as the third component in organic solar cells not only to improve the device performing efficiency but also to enhance the stability of the device. PM6:Y6-based OPV with ZY-4Cl as the additive exhibited good air stability, maintaining 94% of its initial PCE for over 1390 h (25 °C, 40% humidity).

PCE of 9.46% has been achieved for P3HT based polymer organic solar cells when ZY-4Cl was used as the non-fullerene acceptor. Further device performance improvement to PCE over 10% was observed when a volatilizable solid additive SA4 (2-(thiophen-2-ylmethylene)-1H-indene-1,3(2H)-dione) was introduced in the active layer.

High efficient non-flullerene acceptor

High efficient non-flullerene acceptor

with highly conjugated core

Reduces charge recombination

Reduces charge recombination

By improving phase separation of the donor and acceptor

Worldwide shipping for 2703920-28-7

Worldwide shipping

Quick and reliable shipping

High purity

High purity

>98% High purity

Device structure: ITO/PEDOT:PSS/P3HT:ZY-4Cl//Al

Thickness (nm) VOC (V) JSC (mA cm-2) FF (%) PCE (%)
100 0.88 16.49 65 9.46

Chemical Structure

zy-4cl chemical structure, CAS# 2703920-28-7
Chemical structure of ZY-4Cl, CAS 2703920-28-7.

General Information

CAS Number 2703920-28-7
Chemical Formula C84H102Cl4N4O4S5
Purity >98% (1HNMR)
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(methane-lylidene)))bis(5,6-dichloro-1H-indene-1,3(2H)-dione)
Molecular Weight 1533.87 g/mol
HOMO / LUMO HOMO = -5.64 eV, LUMO = -3.67 eV [1]
Solubility Chloroform, chlorobenzene
Form Dark blue to black powder/crystals
Synonyms BTP-IO-4Cl
Classification / Family NFAs, n-type non-fullerene electron acceptors, organic semiconducting materials, low band-gap small molecule, small molecular acceptor, organic photovoltaics, organic photodetectors (OPDs), polymer solar cells, NF-PSCs


Batch Quantity Price
M2350A1 50 mg £260
M2350A1 100 mg £400
M2350A1 250 mg £800
M2350A1 500 mg £1450
M2350A1 1 g £2600

MSDS Documentation


Literature and Reviews

  1. Molecular design of a non-fullerene acceptor enables a P3HT-based organic solar cell with 9.46% efficiency, Energy Environ. Sci., 13, 2864--2869 (2020); DOI: 10.1039/d0ee01763a.
  2. Thermally stable poly(3-hexylthiophene): Nonfullerene solar cells with efficiency breaking 10%, M. Gao et al., Aggreg., e190 (2022); DOI: 10.1002/agt2.190.
  3. Achieving over 10% Efficiency in Poly(3-hexylthiophene)-Based Organic Solar Cells via Solid Additives, C. Yang et al., ChemSusChem 14 (17), 3607-3613 (2021); DOI: 10.1002/cssc.202100627.
Return to the top