EH-IDTBR

CAS Number 2102510-60-9

A non-fullerene acceptor

Used to enhance the performance of organic solar cells

Specifications | Pricing and Options | MSDS | Literature and Reviews

EH-IDTBR (CAS number 2102510-60-9) is a small molecule with an indacenothiophene core capped with two benzothiadiazole-linked rhodanine groups. Same as o-IDTBR, EH-IDTBR also possesses an acceptor-acceptor–donor–acceptor-acceptor (A-A'–D–A'-A) structure and is widely used as a non-fullerene acceptor in organic/polymer solar cells. EH-IDTBR has a HOMO energy level at −5.6 eV and a LUMO at −3.9 eV, resulting in bandgap of 1.7 eV. EH-IDTBR is typically blended with the active material to create a bulk heterojunction as the active layer in solar cells. In a solar cell device of ITO/ZnO/EH-IDTBR/PffBT4T-2OD/MoO₃/Ag, EH-IDTBR has demonstrated improved stability with negligible 'burn-in' efficiency loss compared to PffBT4T-2OD:PC₇₁BM devices (PCE losses after 60 h of 0 ± 4% and −26± 8%, respectively).

With addition of EH-IDTBR (18%) as the third component to the active layer of PCE10:F8IC, the PCE is increased from 7.2% to 12.3%. This increase can be attributed to the reduced energetic disorder in hole and electron transport facilitated by EH-IDTBR.

Enhanced OPVs performance

PCE increased from 7.2% to 12.3%

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Non-fullerene acceptor

Non-fullerene acceptor in organic/polymer solar cells

Improve OPVs life-time

Negligible "burn-in" efficiency loss

Device structure: ITO/ZnO/EH-IDTBR-PffBT4T-2OD/MoO₃/Ag [3]

Thickness (nm)	V_OC(V)	J_SC (mA cm^-2)	FF (%)	PCE (%)
70nm (PffBT4T-2OD:EH-IDTBR 1:1.4)	1.08	14.6	60.0	9.5

Device structure: ITO/PEDOT:PSS/EH-IDTBR-PCE10-F8IC/DPO/Ag [5]

Thickness (nm)	V_OC(V)	J_SC (mA cm^-2)	FF (%)	PCE (%)
160-170nm(EH-IDTBR:F8IC:PCE10 1:1.4:0.3)	0.66	24.6	71.4	12.3

EH-IDTBR is available to buy online in quantities from 100 mg to 1 g (please contact us for larger orders). Larger quantities offer the best value, while smaller quantities may be more suitable for some applications. Eligible orders ship free.

General Information

CAS Number	2102510-60-9
Chemical Formula	C₇₂H₈₈N₆O₂S₈
Purity	98%
Full Name	(5Z)-3-Ethyl-2-sulfanylidene-5- [[4-[9,9,18,18-tetrakis(2-ethylhexyl)-15-[7-[(Z)-(3-ethyl-4-oxo-2-sulfanylidene-1,3-thiazolidin-5-ylidene)methyl]-2,1,3-benzothiadiazol-4-yl]-5,14-dithiapentacyclo[10.6.0.0^3,10.0^4,8.0^13,17]octadeca-1(12),2,4(8),6,10,13(17),15-heptaen-6-yl]-2,1,3-benzothiadiazol-7-yl]methylidene]-1,3-thiazolidin-4-one
Molecular Weight	1326.03 g/mol
Absorption	λ_max 642 nm (CH₂Cl₂) [2] λ_max 675 nm (film) [2]
Emission	λ_max 738 nm (CH₂Cl₂) [2] λ_max 766 nm (film) [2]
HOMO/LUMO	HOMO = −5.6 eV LUMO = −3.9 eV [1]
Melting Point	211 – 216 °C
Solubility	Chloroform, chlorobenzene
Appearance	Black powder
Synonyms	N/A
Classification / Family	NFAs, Non-fullerene acceptors, organic semiconducting materials, low band-gap small molecule, small molecular acceptor, organic photovoltaics, polymer solar cells, NF-PSCs, NLOs

Chemical Structure

eh-idtbr, 2102510-60-9 — EH-IDTBR chemical structure, CAS 2102510-60-9

Pricing

Product Code	Quantity	Price
M2413	100 mg	]] £280
M2413	250 mg	£600

MSDS Documentation

EH-IDTBR MSDS Sheet

Literature and Reviews

Mid-gap trap state-mediated dark current in organic photodiodes, O. Sandberg et al., Nat. Photonics, 17, 368–374(2023); DOI: 10.1038/s41566-023-01173-5.
Highly broadband NLO response of acceptor-donor-acceptor materials with a planar conformation, Y. Huang et al., Mater. Adv., 2, 2097(2021); DOI: 10.1039/d0ma00918k.
An efficient, "burn in" free organic solar cell employing a nonfullerene electron acceptor, H. Cha et al., Adv. Mater., 29(33), 1701156(2017); DOI: 10.1002/adma.201701156.

Increasing the ionization energy offset to increase the quantum efficiency in non-fullerene acceptor-based organic solar cells: how far can we go?, J. Gorenflot et al., Adv. Mater. Interfaces, 10, 2202515(2023); DOI: 10.1002/admi.202202515.
Energetic disorder and activation energy in efficient ternary organic solar cells with nonfullerene acceptor Eh-IDTBR as the third component, J. Lv et al., Sol. RRL, 1900403(2019); DOI: 10.1002/solr.201900403.

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