DMQA
CAS Number 19205-19-7
Fluorescent Dopant Materials, Green Dopant Materials, Dopant Materials, TADF Materials,
DMQA, green dopant material used in OLEDs
Used in green light photodetectors such as photo sensors and chemical sensors, 5,12-Dihydro-5,12-dimethylquino[2,3-b]acridine-7,14-dione, CAS No. 19205-19-7, Sublimed ≥99.0%
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] |
| Synonyms |
|
| Classification / Family | Green dopant materials, OLEDs, Photodetectors, Organic electronics |
Product Details
| Purity | >99% (sublimed) |
|---|---|
| Melting point | 286 °C (dec.)(lit.) |
| Color | 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
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] |
|---|---|
| Color | Green 
|
| 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] |
|---|---|
| Color | 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] |
|---|---|
| Color | 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] |
|---|---|
| Color | 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) |
|---|---|
| Color | Green
|
| Current Efficiency @ 20 mA/cm2 | 14.7 cd/A |
*For chemical structure information please refer to the cited references
MSDS Documentation
DMQA MSDS sheetLiterature 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.