m-MTDATA

CAS Number 124729-98-2

MSDS

m-MTDATA, effective HIL material to lower driving voltage of OLED devices

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Overview | Specifications | Pricing and Options | MSDS | Literature and Reviews

With its very low solid-state ionisation potential and good-quality amorphous film, 4,4',4''-Tris[phenyl(m-tolyl)amino]triphenylamine, m-MTDATA acts as an effective material for the hole-injection buffer layer (HIL) that facilitates hole injection from the ITO electrode to the hole transporting layer (HTL). This potentially lowers the driving voltage of the OLED devices.

F4-TCNQ, a strong electron acceptor, is always used together with m-MTDATA as a p-doping material to improve the conductivity of the HTL buffering layer. Typical structure of the device (or part of the device) is ITO/p-doped m-MTDATA/HTL/etc.

General Information

CAS number	124729-98-2
Chemical formula	C₅₇H₄₈N₄
Molecular weight	789.02 g/mol
Absorption	λ_max 312 nm, 342 nm in THF
Fluorescence	λ_em 425 nm in THF
HOMO/LUMO	HOMO 5.1 eV, LUMO 2.0 eV [1]
Synonyms	4,4',4''-Tris[(3-methylphenyl)phenylamino]triphenylamine
Classification / Family	Triphenylamine derivatives, Hole-injection materials, Hole transporting materials, Light-emitting diodes, Organic electronics

Product Details

Purity	Sublimed* >99.0% (HPLC)
Melting point	210 °C
Appearance	Yellow/white powder

*Sublimation is a technique used to obtain ultra pure-grade chemicals. For more details about sublimation, please refer to the Sublimed Materials.

Chemical Structure

Device Structure(s)

Device structure	ITO/MoOx (2 nm)/m-MTDATA: MoOx (30 nm, 15 wt.%)/m-MTDATA (10 nm)/Ir(ppz)₃(10 nm)/CBP:PO-01* (3 nm, 6 wt.%)/Ir(ppz)₃ (1 nm)/DBFDPOPhCz*:FIrpic (10 nm,10 wt.%)/Bphen (36 nm)/LiF (1 nm)/Al [3]
Colour	White
Max. EQE	12.2%
Max. Current Efficiency	42.4 cd/A
Max. Power Efficiency	47.6 lm W⁻¹

Device structure	ITO/[F4-TCNQ(x nm)/m-MTDATA(y nm)]_n/NPB/Alq₃/Bphen/Cs₂CO₃/Al [4]
Colour	Green
Max. Luminance	23,500 cd/m²
Max. Current Efficiency	7.0 cd/A
Max. Power Efficiency	4.46 lm W⁻¹

Device structure	ITO/PEDOT:PSS(40nm)/m-MTDATA:Ir(Flpy-CF₃)₃(40nm)/TmPyPB(55nm)/LiF(0.5nm)/Al(100nm) [5]
Colour	Yellow
Max. EQE	25.2%
Max. Luminance	43,085 cd/m²
Max. Current Efficiency	74.3 cd/A
Max. Power Efficiency	97.2 lm W⁻¹

Device structure	ITO/PEDOT:PSS/m-MTDATA (20 nm)/m-MTDATA:3TPYMB (60 nm)/3TPYMB (10 nm)/LiF (0.8 nm)/ Al (100 nm) [6]
Colour	Red
Max. Luminance	17,100cd/m²
Max. Current Efficiency	36.79 cd/A

Device structure	ITO (80 nm)/m-MTDATA (20 nm)/NPB (20 nm)/[ADN:Alq₃ (4:1)]:1wt.% DCJTB:0.2wt.%C545T/Alq3 (30 nm)/LiF (1 nm)/Al (100 nm) [7]
Colour	Red
Max. Luminance	11,600 cd/m²
Max. Current Efficiency	3.6 cd/A

Device structure	ITO/m-MTDATA*:F4-TCNQ (100 nm)/TPD (5 nm)/Alq₃ (20 nm) /BPhen (10 nm)/ Bphen:Li (30 nm)/LiF (1 nm)/Al (100 nm) [8]
Colour	Green
Max. Luminance	10,000 cd/m² at 5.2 V
Max. Current Efficiency	5.27 cd/A

Device structure	ITO/m-MTDATA (30 nm)/NPB (20 nm)/TPBI:4 wt% Ir(ppy)₃:2 wt%Ir(piq)₂(acac) (30 nm)/Alq₃(20 nm)/LiF/Al [9]
Colour	White
Max. Luminance	33,012 cd/m²
Current Efficiency@100 cd/m²	15.3 cd/A
Max. Powder Efficiency	10.7 lm W⁻¹

Device structure	ITO/m-MTDATA/TPD/F-TBB*/Alq₃/MgAg [10]
Colour	Blue
Max EQE	1.4%
Maximum luminance	3960 cd m^-2at 15.0 V

*For chemical structure information please refer to the cited references.

Pricing

Grade	Order Code	Quantity	Price
Sublimed (>98.0% purity)	M621	250 mg	£155
Sublimed (>98.0% purity)	M621	500 mg	£250
Sublimed (>98.0% purity)	M621	1 g	£420

MSDS Documentation

m-MTDATA MSDS sheet

Literature and Reviews

Nanoscale transport of charge-transfer states in organic donor–acceptor blends, P. B. Deotare et al., Nat. Mater., 14, 1130-1135 (2015). DOI: 10.1038/NMAT4424.
Photophysical Investigation of the Thermally Activated Delayed Emission from Films of m-MTDATA:PBD Exciplex, D. Graves et al., Adv. Funct. Mater., 24, 2343–2351 (2014). DOI: 10.1002/adfm.201303389.
Highly efficient and color-stable white organic light-emitting diode based on a novel blue phosphorescent host, Q. Wu et al., Syn. Metals 187, 160– 164 (2014). http://dx.doi.org/10.1016/j.synthmet.2013.11.010.

Effect of type-II quantumwell of m-MTDATA/a-NPD on the performance of green organic light-emitting diodes, J. Yang et al., Microelectronics J.l40, 63–65 (2009). doi:10.1016/j.mejo.2008.08.004.
Solution-Processed Phosphorescent Organic LightEmitting Diodes with Ultralow Driving Voltage and Very High Power Efficiency, S. Wang et al., Sci. Report, 5:12487 (2015); DOI: 10.1038/srep12487.
Exciplex emission and decay of co-deposited 4,4′,4″-tris[3-methylphenyl(phenyl)amino]triphenylamine:tris-[3-(3-pyridyl)mesityl]borane organic light-emitting devices with different electron transporting layer thicknesses, Q Huang et al., Appl. Phys. Lett. 104, 161112 (2014); http://dx.doi.org/10.1063/1.4870492.
Red organic light-emitting diodes with high efficiency, low driving voltage and saturated red color realized via two step energy transfer based on ADN and Alq3 co-host system, K. Haq et al., Curr. Appl. Phys., 9, 257-262 (2009); doi:10.1016/j.cap.2008.02.005.
Low-voltage organic electroluminescent devices using pin structures, J. Huang et al., Appl. Phys. Lett. 80, 139 (2002); http://dx.doi.org/10.1063/1.143211.
High-efficiency electrophosphorescent white organic light-emitting devices with a double-doped emissive layer, W. Xie et al., Semicond. Sci. Technol. 20, 326–329 (2005); doi:10.1088/0268-1242/20/3/013.
Development of high-performance blue-violet-emitting organic electroluminescent devices, K. Okumoto et al., Appl. Phys. Lett. 79(9), 1231–1233 (2001).
Highly efficient flexible organic light-emitting devices utilizing F4-TCNQ/m-MTDATA multiple quantumwell structures, X. Wu et al., J. Luminescence 132, 1261–1264 (2012). doi:10.1016/j.jlumin.2011.12.084.
High-efficiency electrophosphorescent organic light-emitting diodes with double lightemitting
layers, X. Zhou et al., Appl. Phys. Lett., 81, 4070 (2002). doi: 10.1063/1.1522495.