DMQA

CAS Number 19205-19-7

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

DMQA, green dopant material used in OLEDs

Used in green light photodetectors such as photo sensors and chemical sensors

N,N'-Dimethylquinacridone (DMQA) is a green dopant material used in OLEDs. Highly stable and longer-lifetime OLED devices have been achieved by using DMQA as the dopant to a double host (aminoanthracene and Alq₃). It is believed that DMQA can prevent excimer formation, thus prolonging the the lifetime of the devices.

By using DMQA as a green dopant, very high efficiency OLEDs with a luminance of greater than 88,000 cd/m2, EQE of 5.4% and current efficiency of 21.1 cd/A have been achieved. DMQA has also been used in green light photodetectors for practical applications, such as photo sensors and chemical sensors.

General Information

CAS number	19205-19-7
Chemical formula	C₂₂H₁₆N₂O₂
Molecular weight	340.37 g/mol
Absorption	λ_max 294 nm, 510 nm (in THF)
Fluorescence	λ_em 523 nm (in THF)
HOMO/LUMO	HOMO = 5.35 eV; LUMU = 3.17 eV [1]
Synonyms	N,N'-Dimethylquinacridone 5,12-Dihydro-5,12-dimethylquino[2,3-b]acridine-7,14-dione
Classification / Family	Green dopant materials, OLEDs, Photodetectors, Organic electronics

Product Details

Purity	>99% (sublimed)
Melting point	286 °C (dec.)(lit.)
Colour	Red powder/crystals

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

Chemical Structure

DMQA structure — Chemical structure of N,N'-Dimethylquinacridone (DMQA)

Device Structure(s)

Device structure	ITO/CuPc (15 nm)/NPB (60 nm)/Alq₃:0.4 wt.% DMQA (37.5 nm)/Alq (37.5 nm)/MgAg (200 nm) [2]
Colour	Green
Luminance	1,322 cd/m²
Current Efficiency	6.61 cd/A
Lifetime (T_1/2)	7,500 hours

Device structure	ITO (150 nm)/a-NPB (60 nm)/Alq₃: 1 wt.% C545T:0.75 wt.% DMQA* (30 nm)/Alq₃(30 nm)/LiF (0.8 nm)/Al (150 nm) [3]
Colour	Green
Max. EQE	6.7%
Max. Luminance	84,900 cd/m²
Max. Current Efficiency	23.4 cd/A

Device structure	(ITO)/2-TNATA (5 nm)/NPB (40 nm)/CBP:6 wt.% Ir(ppy)3:0.5 wt.% DMQA (30 nm)/Bphen (10 nm)/Alq₃ (20nm)/LiF (0.5 nm)/Al (100 nm) [4]
Colour	Green
Max. EQE	1.85
Max. Current Efficiency	7.08 cd/A
Max. Power Efficiency	4.03 lm/W

Device structure	ITO (80 nm)/NPB (40 nm)/ADN:0.6 wt.% C545T:1.2 wt.% DMQA* (30 nm)//Alq₃ (30 nm)/LiF (1 nm)/Al(100 nm) [5]
Colour	Green
Luminance @ 50 mA/cm²	4,750 cd/m²
Current Efficiency @ 50 mA/cm²	9.5 cd/A

Device structure	ITO/NPB (60nm)/ADN:Alq (9:1):0.8 wt.% DMQA (20nm)/BPhen (10nm)/Alq3 (30nm)/LiF (1nm)/Al (200nm) [6] [@20 mA/cm2: 14.7 cd/A)
Colour	Green
Current Efficiency @ 20 mA/cm²	14.7 cd/A

*For chemical structure information please refer to the cited references

Pricing

Grade	Order Code	Quantity	Price
Sublimed (>99% purity)	M971	1 g	£180
Sublimed (>99% purity)	M971	5 g	£720

MSDS Documentation

DMQA MSDS sheet

Literature and Reviews

Low dark current small molecule organic photodetectors with selective response to green light, D-S. Leem et al., Appl. Phys. Lett., 103, 043305 (2013); doi: 10.1063/1.4816502 .
Doped organic electroluminescent devices with improved stability, J. Shi et al., Appl. Phys. Lett., 70, 1665 (1997); doi: 10.1063/1.118664.
Highly efficient tris(8-hydroxyquinoline) aluminum-based organic light-emitting diodes utilized by balanced energy transfer with cosensitizing fluorescent dyes, Y. Park et al., Appl. Phys. Lett., 95, 143305 (2009); doi: 10.1063/1.3243689.
Triplet to singlet transition induced low efficiency roll-off in green phosphorescent organic light-emitting diodes, Z. Su et al., Thin Solid Films 519, 2540–2543 (2011); doi:10.1016/j.tsf.2010.12.008.

Green organic light-emitting diodes with improved stability and efficiency utilizing a wide band gap material as the host, H. Tang et al., Displays 29, 502–505 (2009); doi:10.1016/j.displa.2008.05.001.
Improved efficiency for green and red emitting electroluminescent devices using the same cohost composed of 9,10-di(2-naphthyl)anthracene and tris-(8-hydroxyquinolinato)aluminum, J. Zhu et al., Physica E 42, 158–161 (2009); doi:10.1016/j.physe.2009.09.020.