IEICO-4F, IOTIC-4F

CAS Number 2089044-02-8

IEICO-4F, low band-gap, low energy loss non-fullerene acceptor

Used in high performance organic solar cells and panchromatic organic photodetectors

IEICO-4F (or IOTIC-4F), CAS number 2089044-02-8, is a low band-gap and low energy-loss non-fullerene acceptor showing an A-D-A type structure with extra thiophenes as spacers between the acceptor and donor units. The structure has an electron-donating fused five-member-ring indaceno[1,2-b:5,6-b′]dithiophene (IDT) core, terminated by two electron-withdrawing units, 2-(5,6-difluoro-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile (IC-2F). IEICO-4F extends into the near infrared (NIR) region with maximum absorption around 860 nm, 200 nm red-shifted compared to ITIC.

IEICO-4F or IEICO-4Cl can also be used in high performance panchromatic organic photodetectors (OPDS). OPD device based on P3HT:IEICO-4F:PC71BM exhibited a high detectivity (D*) of 1.35 × 10¹² Jones at 805 nm.

By incorporating a small molecule donor BIT-4F-T, combining the merits of complementary absorption of the visible light region (400 - 600 nm) to the polymer donor PTB7-Th and non-fullerene acceptor IEICO-4F, PTB7-Th:BIT-4F-T:IEICO-4F ternary organic solar cells showed improved efficiencies, reaching up to a PCE of 14.0%.

High efficient non-flullerene acceptor

with highly conjugated core

Wide absorption range into near infrared region

Maximum absorption around 860 nm

Worldwide shipping

Quick and reliable shipping

High purity

>99% High purity

Device structure: ITO/ZnO (~35 nm)/PTB7-Th:BIT-4F-T:IEICO-4F (0.9:0.1:1, 10% BIT-4F-T) and (~150 nm)/MoOx (~7 nm)/Ag (~100 nm)

Thickness (nm)	V_OC(V)	J_SC(mA cm^-2)	FF (%)	PCE(%)
150	0.723	27.30	70.9	14.0

Chemical Structure

IEICO-4F NFA — Chemical structure of IEICO-4F

Literature and Reviews

Spectral Engineering of Semitransparent Polymer Solar Cells for Greenhouse Applications, H. Shi et al., Adv. Energy Mater., 1803438 (2018); DOI: 10.1002/aenm.201803438.
Dual Sensitizer and Processing-Aid Behavior of Donor Enables Efficient Ternary Organic Solar, Cells, X. Song et al., Joule 3, 846–857(2019); doi: 10.1016/j.joule.2019.01.009.
A Near-Infrared Photoactive Morphology Modifier Leads to Significant Current Improvement and Energy Loss Mitigation for Ternary Organic Solar Cells, L. Zhan et al., Adv. Sci., 5, 1800755 (2018); DOI: 10.1002/advs.201800755.
High Efficient Near-infrared and Semitransparent Polymer Solar Cells Based on an Ultra-Narrow Bandgap Nonfullerene Acceptor, J. Chen et al., J. Mater. Chem. A, 7, 3745-3751 (2019); doi: 10.1039/C8TA11484F.

General Information

CAS Number	2089044-02-8
Chemical Formula	C₁₁₄H₁₁₄F₄N₄O₄S₄
Purity	>99% (¹HNMR)
Full Name	2,2'-((2Z,2'Z)-(((4,4,9,9-tetrakis(4-hexylphenyl)-4,9-dihydro-sindaceno[1,2-b:5,6-b']dithiophene-2,7-diyl)bis(4-((2-ethylhexyl)oxy)thiophene-5,2-diyl))bis(methanylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1- diylidene))dimalononitrile
Molecular Weight	1808.40 g/mol
Absorption	λ_max 865 nm (Film), NIR absorption
HOMO / LUMO	HOMO = -5.44 eV, LUMO = -4.19 eV [1]
Solubility	Chloroform, chlorobenzene
Form	Dark blue powder/crystals
Synonyms	2,2'- [[4,4,9,9-Tetrakis(4-hexylphenyl)-4,9-dihydro-s-indaceno[1,2-b:5,6-b']dithiophene-2,7-diyl]bis]] [[4-[(2-ethylhexyl)oxy]-5,2-thiophenediyl]methylidyne(5,6-difluoro-3-oxo-1H-indene-2,1(3H)-diylidene) ]]bis[propanedinitrile], IOTIC-4F
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.