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

Ir(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.

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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.

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