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Product Code M2231A1-100mg
Price £260 ex. VAT

Ir(dpm)PQ2, orange to red phosphorescent emitter

High-purity (>99.0%) and available online for priority dispatch

Bis(2-phenylquinoline)(2,2,6,6-tetramethylheptane-3,5-dionate)iridium(III) - Ir(dpm)PQ2, also known as Ir(PQ)2(tmd) is an orange to red phosphorescent emitter. The ligand 2,2,6,6-tetramethylheptane-3,5-dionate corrdinated to the iridium centre is sterically hindered with two bulky tert-butyl groups at both ends.

Ir(dpm)PQ2 is often either used in pure red as a single emitting layer material or in white emitting highly efficient OLED devices for its low lying triplet energy state and greater stability, preventing triplet-triplet annihilation thus leading to higher device efficiencies.

General Information

CAS number 713079-03-9
Full name Bis(2-phenylquinoline)(2,2,6,6-tetramethylheptane-3,5-dionate)iridium(III)
Chemical formula C41H39N2O2Ir
Molecular weight 783.98 g/mol
Absorption* λmax 333 nm in DCM
Fluorescence λem 595 nm in DCM
HOMO/LUMO HOMO 5.10 eV, LUMO 3.10 eV [1]
Synonyms PQ2Ir(dpm), PQ2Ir, Ir(PQ)2(tmd), Bis[2-(2-quinolinyl)phenyl](2,2,6,6-tetramethyl-3,5-heptanedionato)iridium
Classification / Family Iridium Complex, Organic electronics, TADF-OLEDs, Orange to red phosphorescent dopant materials, Sublimed materials.

* Measurable with an optical spectrometer, see our spectrometer application notes.

Product Details

Purity Sublimed* >99.0% (HPLC)
Melting point TGA >290 °C (0.5% weight loss)
Appearance Red powder/crystals

* Sublimation is a technique used to obtain ultra pure-grade chemicals, see sublimed materials.

Chemical Structure

Chemical structure of Ir(dpm)PQ2 (CAS 713079-03-9)
Chemical structure of Ir(dpm)PQ2, CAS No. 713079-03-9

Device Structure(s)

Device structure ITO/HATCN (5 nm)/NPB (40 nm)/TCTA (5 nm)/BBPI (6 nm)/CBP (3 nm)/CBP:8 wt% Ir(PPy)3 (10 nm)/CBP (3 nm)/BBPI:1.0 wt% PQ2Ir (8 nm)/TPBi (40 nm)/LiF (1 nm)/Al [1]
Colour White white light emitting device
Max Current Efficiency 71.4 cd/A 
Max EQE 33.5%
Max. Power Efficiency 61.5 lm W-1
Device structure ITO (130 nm)/TAPC (40 nm)/TCTA (5 nm)/PQ2Ir(dpm) 2 wt % doped CBP (1 nm)/Ir(ppy)3 6 wt % doped CBP (1 nm)/Ir(dbfmi)* 10 wt % doped PO9 (10 nm)/B3PyPB (50 nm)/LiF (0.5 nm)/Al (100 nm) [2]
Colour White white light emitting device
Max. Current Efficiency 53.7 cd/A 
Max. EQE 23.3%
Max. Power Efficiency 55.2 lm W-1
Device structure ITO/HATCN (10 nm)/NPB (30 nm)/HTM (10 nm)/6 wt% PQ2Ir:BCzPh:SF2-TRZ (25 nm)/T2T (10 nm)/NBPhen (40 nm)/LiF (1 nm)/Al (100 nm), [3]
Colour Red red light emitting device
Max. Current Efficiency 33.6 cd/A 
Max. EQE 19.8%
*For chemical structure information, please refer to the cited references.

MSDS Documentation

Ir(dpm)PQ2 MSDSIr(dpm)PQ2 MSDS sheet


Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2231A1 100 mg £260
Sublimed (>99.0% purity) M2231A1 250 mg £520
Sublimed (>99.0% purity) M2231A1 500 mg £950
Sublimed (>99.0% purity) M2231A1 1 g £1600

Literature and Reviews

  1. Highly efficient single- and multi-emission-layer fluorescent/phosphorescent hybrid white organic light-emitting diodes with ~20% external quantum efficiency, X. Li et al., J. Mater. Chem. C, 3, 9233 (2015); DOI: 10.1039/c5tc02050f.
  2. High-Efficiency Blue and White Organic Light-Emitting Devices Incorporating a Blue Iridium Carbene Complex, H. Sasabe et al., Adv. Mater., 22, 5003–5007 (2010); DOI: 10.1002/adma.201002254.
  3. Predicting Operational Stability for Organic Light-Emitting Diodes with Exciplex Cohosts, Z. Wang et al., Adv. Sci., 6, 1802246 (2019); DOI: 10.1002/advs.201802246.
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