Bis(1-phenylisoquinoline)(acetylacetonate)iridium(III), Ir(piq)₂(acac) is widely used as an efficient phosphorescent red emitter dopant material in PhOLED devices. It was reported that the piq ligand can partially suppress the triplet-triplet annihilation and show short phosphorescent lifetime [2].

General Information

CAS number	435294-03-4
Chemical formula	C35H27IrN2O2
Molecular weight	699.82 g/mol
Absorption	λmax 302 nm in THF
Phosphorescence	λem  633 nm in THF
HOMO/LUMO	HOMO = 5.0 eV, LUMO = 3.0 eV [1]
Synonyms	(piq)2Ir(acac) Bis(1-phenylisoquinoline)(acetylacetonate)iridium(III)
Classification / Family	Organometallic complex, Phosphorescent red emitter, Red dopant, OLED and PLED materials, Sublimed materials

Product Details

Purity	>99.5% (sublimed) >99.0% (unsublimed)
Melting point	366-370 °C (lit.)
Appearance	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 for OLED devices page.

Chemical Structure

Device Structure(s)

Device structure	ITO/m-MTDATA (30 nm)/NPB (20 nm)/TPBI:4 wt% Ir(ppy)3:2 wt% Ir(piq)2(acac) (30 nm)/ Alq3(20 nm)/LiF/Al [3]
Colour	White
Max. Luminance	33,012 cd/m2
Current Efficiency@100  cd/m2	15.3 cd/A
Max. Powder Efficiency	10.7 lm W−1

Device structure	ITO/DNTPD* (60 nm)/NPB (20 nm)/mCP (10 nm)/mCP:FIrpic (25 nm)/CBP:Ir(piq)2acac (5 nm)/BCP (5 nm)/Alq3 (20 nm)/LiF (1 nm)/Al (200 nm) [4]
Colour	White
EQE@500 cd/m2	8.2 %
Current Efficiency@500  cd/m2	12.7 lm W−1

Device structure	ITO/NPB (20 nm)/TCTA (10 nm)/BIQS*:(piq)2Ir(acac) ( 4 wt%, 30 nm)/BCP (15 nm)/Alq3 (50 nm)/LiF (1 nm)/Al (100 nm) [6]
Colour	Red
Max. Luminance	60,138 cd/m2
Max. EQE	23.7
Max. Current Efficiency	28.6 cd/A
Max. Power Efficiency	24.2 lm W−1

Device structure	ITO/NPB/anthracene/TPBI:11% Irppy3:0.5% Ir(piq)2(acac)/Mg:Ag [7]
Colour	White
Max. Luminance	6,398 cd/m2
Max. Current Efficiency	6.4 cd/A

Device structure	ITO/MoO3(1nm)/CBP(20nm)/CBP:Ir(piq)2(acac) (3 wt.%,4 nm)/CBP: Ir(DMP)3(5 wt.%,4 nm)/CBP:Ir(ppy)2(acac)(7 wt.%,5 nm)/CBP(3 nm)/Bepp2:BCzVBi(50wt.%,40nm)/Bepp2(20nm)/LiF(1nm)/Al(100nm) [8]
Colour	White
Max. Current Efficiency	26.4 cd/A
Max. Power Efficiency	24.8 lm W−1

Device structure	ITO/NPB/CBP:3 wt%TBPe:1 wt%rubrene/Zn(BTZ)2:5 wt% Ir(piq)2(acac)/Zn(BTZ)2/Mg:Ag [9]
Colour	White
Max. EQE	2.4%
Max. Luminance	23,000 cd/m2

*For chemical structure information please refer to the cited references.

Characterisation

Pricing

Grade	Order Code	Quantity	Price
Unsublimed (>99.0% purity)	M672	250 mg	£227.00
Sublimed (>99.5% purity)	M671	250 mg	£390.00

MSDS Documentation

Ir(piq)2(acac) MSDS sheet

Literature and Reviews

1. Multilayer organic electrophosphorescent white light-emitting diodes without exciton-blocking layer,G. Lei et al., Appl. Phys. Lett. 88, 103508 (2006); http://dx.doi.org/10.1063/1.2185255.
2. Yellow and Red Electrophosphors Based on Linkage Isomers of Phenylisoquinolinyliridium Complexes: Distinct Differences in Photophysical and Electroluminescence Properties, C-L. Li et al.,  Adv. Funct. Mater. 15, 387-395 (2005); DOI: 10.1002/adfm.200305100.
3. High-efficiency electrophosphorescent white organic light-emitting devices with a double-doped emissive layer, W. Xie et al., Semicond. Sci. Technol. 20, 326–329 (2005); doi:10.1088/0268-1242/20/3/013.
4. Improved color stability in white phosphorescent organic light-emitting diodes using charge confining structure without interlayer, S-H. Kim et al., Appl. Phys. Lett. 91, 123509 (2007); http://dx.doi.org/10.1063/1.2786853.
5. A white organic light-emitting diode with ultra-high color rendering index, high efficiency, and extremely low efficiency roll-off, N. Sun et al., Appl. Phys. Lett. 105, 013303 (2014); http://dx.doi.org/10.1063/1.4890217.
6. Host and Dopant Materials for Idealized Deep-Red Organic Electrophosphorescence Devices, C-H. Fan et al., Adv. Mater., 23, 2981–2985 (2011); DOI: 10.1002/adma.201100610.
7. Full-Wavelength White Organic Light Emitting Diodes with Blue Fluorescence and Phosphorescent Iridium Complexes, J. Li et al., J. Electrochem. Soc. 2006 volume 153, issue 11, H195-H197; doi: 10.1149/1.2335968
8. A multi-zoned white organic light-emitting diode with high CRI and low color temperature,  T. Zhang et al., Sci. Reports, 6:20517; DOI: 10.1038/srep20517.
9. Influence of Dopant Concentration on Electroluminescent Performance of Organic White-Light-Emitting Device with Double-Emissive-Layered Structure, M. Wu et al., Chin. Phys. Lett., 25, 294-297 (2008).

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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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