FREE shipping to on qualifying orders when you spend or more, processed by Ossila BV. All prices ex. VAT. Qualifying orders ship free worldwide! Fast, secure, and backed by the Ossila guarantee. It looks like you are visiting from , click to shop in or change country. Orders to the EU are processed by our EU subsidiary.

It looks like you are using an unsupported browser. You can still place orders by emailing us on info@ossila.com, but you may experience issues browsing our website. Please consider upgrading to a modern browser for better security and an improved browsing experience.


Product Code M2184A1-250mg
Price $575 ex. VAT

Quality assured

Expert support

Volume discounts

Worldwide shipping

Fast and secure


Ir(MDQ)2(acac), phosphorescent emitter employed in OLEDs

Bright and efficient orange-red light emitter


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

Ir(MDQ)2(acac) structure
Chemical structure of Ir(MDQ)2(acac)

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 red light emitting device
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 red light emitting device
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 white light emitting device
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 white light emitting device
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 red light emitting device
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 orange light emitting device
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 £460
Sublimed (>98% purity) M2184A1 500 mg £850
Sublimed (>98% purity) M2184A1 1 g £1600

MSDS Documentation

Ir(MDQ)2(acac) MSDSIr(MDQ)2(acac) MSDS sheet

Literature and Reviews

  1. 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.
  2. 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.
  3. 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.
  4. 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 information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

Return to the top