Order Code: M2126A1
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Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2126A1 100 mg £193.00
Sublimed (>99.0% purity) M2126A1 250 mg £387.00
Sublimed (>99.0% purity) M2126A1 500 mg £673.00
Sublimed (>99.0% purity) M2126A1 1 g £1210.00

General Information

CAS number 664374-03-2
Full name Bis(2,4-difluorophenylpyridinato)-tetrakis(1-pyrazolyl)borate iridium(III)
Chemical formula C34H24N10BF4Ir
Molecular weight 851.64 g/mol
Absorption λmax 367 nm in THF
Fluorescene λem 461 nm in DCM
HOMO/LUMO HOMO 6.10 eV, LUMO 3.10 eV [1]
Synonyms Iridium (III) bis(4',6'-difluorophenylpyridinato)tetrakis(1-pyrazolyl)borate
Classification / Family Iridium Complex, Organic electronics, TADF-OLEDs, Blue dopant materials, Blue phosphorescent OLED materials, Sublimed materials.

Product Details

Purity Sublimed: >99.0% (HPLC)
Melting point TGA: >280 °C (0.5% weight loss)
Appearance Yellow 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.


fir6 chemical structure
Chemical structure of FIr6; CAS No. 664374-03-2.



Bis(2,4-difluorophenylpyridinato)-tetrakis(1-pyrazolyl)borate iridium(III), FIr6, is commonly used as a blue emitter material for OLED devices.

In terms of colour purity and quality, FIr6 is more practical for use in full-colour display devices and lighting applications compared to the more widely-used blue phosphorescent emitter, FIrPicFIr6 shows deeper blue emissions with major vibronic peaks at 458 and 489 nm,  while FIrPic has major vibronic emission peaks at 475 and 500 nm.

Device structure ITO/TAPC (40 nm)/m-DCz-S:10 wt% FIr6 (10 nm)/TmPyPB (40 nm)/LiF (1 nm)/Al (100 nm) [2]
Colour Blue  blue
Max Current Efficiency 49.8 cd/A 
Max EQE 25.1%
Max. Power Efficiency 50.9 lm W-1
Device structure ITO/NPB (10 nm)/TCTA (20 nm)/BCPO: FIr6 (7–8%, 30 nm)/BCP (10nm)/Alq (50 nm)/LiF (1 nm)/Al (100 nm) [3]
Colour Blue  blue
Max. Luminance 28,718 cd/m2
Max. Current Efficiency 36.8 cd/A 
Max. EQE 19.8%
Max. Power Efficiency 33.1 lm W-1
Device structure ITO/ PEDOT:PSS (35 nm)/TAPC (40 nm)/Ad-Cz:5wt%FIr6 (7 nm)/Ad-Pd:10wt%FIr6 (15 nm)/TPBI (40 nm)/LiF (1 nm)/Al (100 nm) [4]
Colour Blue  blue
Max. EQE 19.0%
Max. Power Efficiency 33.0 lm W-1
Device structure ITO/PEDOT:PSS (40 nm)/ p-TAZSiTPA:FIr6 (10 wt%, 40 nm)/Tm3PyPB (5 nm)/TPBI (30 nm)/LiF (1 nm)/Al (100 nm [5]
Colour Blue  blue
Max. Current Efficiency 12.5 cd/A 
Max. EQE 6.3%
Max. Power Efficiency 6.2 lm W-1

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


Literature and Reviews

  1. Efficient, deep-blue organic electrophosphorescence by guest charge trapping, R. J. Holmes et al., Appl. Phys. Lett. 83, 3818 (2003); doi: 10.1063/1.1624639.
  2. An ideal universal host for highly efficient full-color, white phosphorescent and TADF OLEDs with a simple and unified structure, K. Gao et al., J. Mater. Chem. C, 5, 10406 (2017); DOI: 10.1039/c7tc04149g.
  3. A Highly Efficient Universal Bipolar Host for Blue, Green, and Red Phosphorescent OLEDs, H. Chou et al., Adv. Mater., 22, 2468–2471 (2010); DOI: 10.1002/adma.201000061.
  4. Pyridoindole Derivative as Electron Transporting Host Material for Efficient Deep-blue Phosphorescent Organic Light-emitting Diodes, H. Fukagawa et al., Adv. Mater., 22, 4775–4778 (2010); DOI: 10.1002/adma.201001221.
  5. Highly Efficient Deep-Blue Electrophosphorescence Enabled by Solution- Processed Bipolar Tetraarylsilane Host with Both a High Triplet Energy and a High-Lying HOMO Level, S. Gong et al., Adv. Mater., 23, 4956–4959 (2011); DOI: 10.1002/adma.201102758.
  6. High-efficiency white organic light emitting devices with three separate phosphorescent emission layers, Y. Sun et al., Appl. Phys. Lett. 91, 263503 (2007); doi: 10.1063/1.2827178.