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Product Code M971-1g
Price £180 ex. VAT

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 λmax 294 nm, 510 nm (in THF)
Fluorescence λem 523 nm (in THF)
HOMO/LUMO HOMO = 5.35 eV; LUMU = 3.17 eV [1]
  • 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 green light emitting device
Luminance 1,322 cd/m2
Current Efficiency 6.61 cd/A
Lifetime (T1/2) 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 green light emitting device
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 green light emitting device
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 green light emitting device
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 green light emitting device
Current Efficiency @ 20 mA/cm2 14.7 cd/A

*For chemical structure information please refer to the cited references


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

MSDS Documentation


Literature and Reviews

  1. 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 .
  2. Doped organic electroluminescent devices with improved stability, J. Shi et al., Appl. Phys. Lett., 70, 1665 (1997); doi: 10.1063/1.118664.
  3. 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.
  4. 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.
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