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	λmax 312 nm, 342 nm in THF
Fluorescence	λem 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	98.7% (sublimed)
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 for OLED devices page.

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-2 at 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	£118.00
Sublimed (>98.0% purity)	M621	500 mg	£189.00
Sublimed (>98.0% purity)	M621	1 g	£329.00

MSDS Documentation

m-MTDATA MSDS sheet

Literature and Reviews

1. 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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. 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.
8. 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.
9. 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.
10. Development of high-performance blue-violet-emitting organic electroluminescent devices, K. Okumoto et al., Appl. Phys. Lett. 79(9), 1231–1233 (2001).
11. 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.
12. High-efficiency electrophosphorescent organic light-emitting diodes with double lightemittinglayers, X. Zhou et al., Appl. Phys. Lett., 81, 4070 (2002). doi: 10.1063/1.1522495.

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To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.

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