C545T, Coumarin 545T

CAS Number 155306-71-1

Dopant Materials, Green Dopant Materials, High Purity Sublimed Materials, Materials, OLED Materials, Semiconducting Molecules

MSDS

C545T, for highly-efficient OLED devices as a green-emitting dopant

High-purity (>99.0%) and available online for priority dispatch

C545T (also known as Coumarin 545T) is a family member of Coumarins.

Coumarins have been studied extensively for their applications in electronic and photonic devices. They possess high emission yield, excellent photo-stability, variable absorption range, and good solubility. As such, coumarins are widely used as fluorescence probes, charge-transfer materials, and dyes for OLEDs, OPV and laser dye applications.

C545T is commonly used for highly-efficient OLED devices as a green-emitting dopant and electron transport host material. With four methyl groups and enhanced solubility, Coumarin 545T is also used in laser dyes with increased laser conversion efficiencies at higher concentrations.

General Information

CAS number	155306-71-1
Chemical formula	C₂₆H₂₆N₂O₂S
Molecular weight	430.56 g/mol
Absorption*	λ_max 473 nm (in THF)
Fluorescence	λ_em 506 nm (in THF)
HOMO/LUMO	HOMO = 5.6 eV, LUMO = 3.0 eV [2]
Synonyms	10-(2-Benzothiazolyl)-2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1H,5H,11H-(1)benzopyropyrano(6,7-8-I,j)quinolizin-11-one, Coumarin 545T
Classification / Family	Coumarins, Electron transport-layer (ETL) materials, Green dopant materials, Organic Light-Emitting Diodes (OLEDs), Organic photovoltaics (OPV), Organic electronics, Laser dyes, Sublimed materials

* Measurable with an USB spectrometer, see our spectrometer application notes.

Product Details

Purity	>99% (sublimed*)
TGA	228°C, T_d≥ 250 ^oC (5% weight loss)
Colour	Pale yellow - Yellow powder/crystals

* Sublimation is a technique used to obtain ultra pure-grade chemicals, see sublimed materials.

Chemical Structure

Device Structure(s)

Device structure	ITO/Mg (1 nm)/Cs₂O:Bphen (11 nm)/Alq₃ (30 nm)/C545T:Alq₃ (30 nm)/NPB (60 nm)/WO₃ (5 nm)/Al [1]
Colour	Green
Max. Current Efficiency	23.7 cd/A
Max. Power Efficiency	12.4 lm W⁻¹

Device structure	Fluorocarbon coated ITO/NPB (60nm) /0.8% C545T doped TPBA (940 nm) /DBzA (20 nm) /LiF (1 nm)/Al [2]
Colour	Green
Max. Current Efficiency	29.8 cd/A
Max. Power Efficiency	32.3 lm W⁻¹
Max. EQE	9.9%

Device structure	ITO/MoO₃ (10 nm)/PEDOT:PSS (30 nm)/NPB(25 nm)/Alq₃:C545T (35 nm)/Alq₃ (35 nm)/LiF (1 nm)/Al (120 nm) [3]
Colour	Green
Max. Current Efficiency	23.4 cd/A
Max. EQE	6.31%

Device structure	ITO/MoO₃ (1 nm)/C545T-Alq3 (100 nm)/LiF (1 nm)/Al (100 nm) [4]
Colour	Green
Max. Luminance	26,750 cd/m²
Current Efficiency@100cd/m²	12.8 cd/A

Device structure	ITO/TAPC (40 nm)/ TAPC:DPTPCz:0.2 wt% C545T (30 nm)/TmPyPB (50 nm)/LiF (1 nm)/Al (100 nm) [5]
Colour	Green
Max. Current Efficiency	44.0 cd/A
Max. Power Efficiency	46.1lm W⁻¹
Max. EQE	14.5%

Pricing

Grade	Order Code	Quantity	Price
Sublimed (>99% purity)	M2094A1	500 mg	£280
Sublimed (>99% purity)	M2094A1	1 g	£440

MSDS Documentation

C545T MSDS sheet

Literature and Review

Highly efficient and stable inverted bottom-emission organic light emitting devices, T-Y. Chu et al., Appl. Phys. Lett., 89, 053503 (2006); doi: 10.1063/1.2268923.
Green fluorescent organic light-emitting device with external quantum efficiency of nearly 10%, K. Okumoto et al., Appl. Phys. Lett., 89, 063504 (2006); doi: 10.1063/1.2266452.
High-efficiency fluorescent organic light-emitting diodes with MoO3 and PEDOT:PSS composition film as a hole injection layer, H. Zhang et al., J. Mater. Chem. C, 2, 9620 (2014); DOI: 10.1039/c4tc01310g.

Efficient Single-Layer Organic Light-Emitting Diodes Based on C545T-Alq3 System, Z. Liu et al., J. Phys. Chem. C, 114, 11931–11935 (2010); DOI: 10.1021/jp101269r.
Nearly 100% Triplet Harvesting in Conventional Fluorescent Dopant-Based Organic Light-Emitting Devices Through Energy Transfer from Exciplex, X. Liu et al., Adv. Mater., 27, 2025–2030 (2015); DOI: 10.1002/adma.201500013.