Ir(MDQ)2(acac)

Ir(MDQ)2(acac) has a 2-methyldibenzo[f,h]quinoxaline ligand that coordinates with the iridium metal center via the formation of Ir-N and Ir-C bonds.
Ir(MDQ)2(acac) is another family member of iridium complexes, which are the most effective phosphorescent emitters employed in OLEDs. Devices based on Ir(MDQ)2(acac) emit orange-red light, with a maximum emission of 600-614 nm. OLEDs with Ir(MDQ)2(acac) as an emitting layer material give great brightness and exceedingly-high external quantum, current, and power efficiencies.
General Information
CAS number | 536755-34-7 |
Full name | Bis(2-methyldibenzo[f,h]quinoxaline)(acetylacetonate) iridium(III) |
Chemical formula | C39H29N4O2Ir |
Molecular weight | 777.89 g/mol |
Absorption | λmax 370 nm in DCM |
Fluorescence | λmax 608 nm in THF |
HOMO/LUMO | HOMO = 5.4 eV, LUMO = 2.8 eV [1] |
Classification / Family | Iridium complexes, Phosphorescent red-orange emitter, Sublimed materials, Organic electronics. |
Product Details
Purity | Sublimed |
Melting point | n/a |
Appearance | Red crystals/powder |
Chemical Structure

Device Structure(s)
Device structure | ITO/MoO3 (3 nm)/TAPC (40 nm)/Ir(MDQ)2(acac) (2 wt%):26DCzPPy (10 nm)/TmPyPB (40 nm)/LiF (1 nm)/Al (100 nm) [1] |
Colour | Red ![]() |
Max. Power Efficiency | 24.39 lm W−1 |
Max. Current Efficiency | 35.2 cd/A |
Max. EQE | 12.3% |
Device structure | ITO/MoO3 (3 nm)/TAPC (40 nm)/Ir(MDQ)2(acac) (2 wt%):TcTa (10 nm)/Ir(MDQ)2(acac) (2 wt%):26DCzPPy (10 nm)/TmPyPB (40 nm)/LiF (1 nm)/Al (100 nm) [1] |
Colour | Red ![]() |
Max. Power Efficiency | 40.19 lm W−1 |
Max. Current Efficiency | 44.76 cd/A |
Max. EQE | 15.5% |
Device structure | ITO/HAT-CN (10 nm)/TAPC (45 nm)/TCTA (10 nm)/Ir(MDQ)2(acac) (0.02 nm)/Ir(ppy)2(acac) (0.02 nm)/FIrpic (0.3 nm)/TmPyPb (40 nm)/ Liq (2 nm)/Al (120 nm) [2] |
Colour | White ![]() |
Max. Power Efficiency | 46.1 lm W−1 |
Max. Current Efficiency | 45.5 cd/A |
Max. EQE | 17.6% |
Device structure | ITO/HAT-CN (10 nm)/TAPC (45 nm)/TCTA (7 nm)/Ir(ppy)2(acac) (0.02 nm)/FIrpic (0.3 nm)/TCTA (3 nm)/ Ir(MDQ)2(acac) (0.02 nm)/TmPyPb (3 nm)/Ir(ppy)2(acac) (0.02 nm)/FIrpic (0.3 nm)/TmPyPb (37 nm)/Liq (2 nm)/Al (120 nm) [2] |
Colour | White ![]() |
Max. Power Efficiency | 43.1 lm W−1 |
Max. Current Efficiency | 44.0 cd/A |
Max. EQE | 17.2% |
Device structure | NPB (50 nm)/Ir(MDQ)2(acac):CBP(5.7%, 30 nm)/T PBI (15 nm)/Alq (35 nm) [3] |
Colour | Red ![]() |
Max. Power Efficiency | 13.7 lm W−1 |
Max. Current Efficiency | 26.2 cd/A |
Max. EQE | 12.4 |
Device structure | ITO/HAT-CN (10 nm)/SAFDPA (45 nm)/ SAFDPA:Bphen (1:1, w/w):Ir(MDQ)2(acac) (2 wt %, 20 nm)/Bphen (45 nm)/Liq (2 nm)/Al (120 nm) [4] |
Colour | Reddish Orange ![]() |
Max. Power Efficiency | 31.8 lm W−1 |
Max. Current Efficiency | 32.0 cd/A |
Max. EQE | 10.7% |
*For chemical structure information, please refer to the cited references
Pricing
Grade | Order Code | Quantity | Price |
Sublimed (>98% purity) | M2184A1 | 250 mg | £292.00 |
Sublimed (>98% purity) | M2184A1 | 500 mg | £467.00 |
Sublimed (>98% purity) | M2184A1 | 1 g | £748.00 |
MSDS Documentation
Literature and Reviews
- High performance red organic electroluminescent devices based on a trivalent iridium complex with stepwise energy levels, Y. Li et al., : RSC Adv., 6, 71282 (2016); DOI: 10.1039/c6ra16517f.
- Highly Efficient White Organic Light-Emitting Diodes with Ultrathin Emissive Layers and a Spacer-Free Structure, S. Wu et al., Sci. Rep., 6:25821 (2016); DOI: 10.1038/srep25821.
- New Iridium Complexes as Highly Efficient Orange–Red Emitters in Organic Light‐Emitting Diodes, J. Duan et al., Adv. Mater., 15 (3), 224-228 (2003); doi: 10.1002/adma.200390051.
- Highly Simplified Reddish Orange Phosphorescent Organic Light-Emitting Diodes Incorporating a Novel Carrier- and Exciton-Confining Spiro-Exciplex-Forming Host for Reduced Efficiency Roll-off, T. Xu et al., ACS Appl. Mater. Interfaces, 9, 2701−2710 (2017); DOI: 10.1021/acsami.6b13077.
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.