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Product Code M491-100mg
Price £330 ex. VAT

Ir(btpy)3, efficient red PhOLED

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

Tris(2-(benzo[b]thiophen-2-yl)pyridineiridium, known as Ir(btpy)3, is an efficient red phosphorescent emitter (PHOLED). It is commonly used in organic light-emitting diodes and polymer solar cells as a dopant, and in barometric pressure probes due to its sensitivity to oxygen [2].

Wang et al. demonstrated that a higher Ir(btpy)3 doping concentration is beneficial to photon harvesting in the active layer, but the interpenetrating network of P3HT:PCBM can be damaged through high-temperature annealing treatment [3].

General Information

CAS number 405289-74-9
Chemical formula C39H24IrN3S3
Molecular weight 823.08 g/mol
Absorption λmax 292, 366, 408 nm in THF
Fluorescence λem 596, 645 nm in THF
HOMO/LUMO HOMO 5.08 eV; LUMO 2.67 eV [1]
  • Tris(2-(benzo[b]thiophen-2-yl)pyridineiridium(III);
  • Tris[2-(benzo[b]thiophen-2-yl)pyridinato-C3,N]iridium(III)
  • fac-Tris[2-(benzo[b]thiophen-2-yl)pyridinato-C3,N]iridium(III)
  • fac-Ir(btpy)3, Tris(2-(benzo[b]thiophen-2-yl)pyridineiridium(III)
Classification / Family Organometallic complex, phosphorescent red emitter, phosphorescence dopant OLEDs, polymer solar cells, sublimed materials

Product Details

Purity >99.0% (sublimed)
Melting point > 300 °C
Colour Red powder

*Sublimation is a technique used to obtain ultra pure-grade chemicals. For more details about sublimation, please refer to the Sublimed Materials.

Chemical Structure

ir(btpy)3 chemical structure
Chemical Structure of Tris(2-(benzo[b]thiophen-2-yl)pyridineiridium(III) [Ir(btpy)3]


1H NMR Ir(btpy)3
1H NMR of fac-Tris[2-(benzo[b]thiophen-2-yl)pyridinato-C3,N]iridium(III) Ir(btpy)3 in CDCl3
HPLC ir(btpy)3
HPLC trace of Tris[2-(benzo[b]thiophen-2-yl)pyridinato-C3,N]iridium(III), Ir(btpy)3


Grade Order Code Quantity Price
Sublimed (>99.0% purity) M491 100 mg £330
Sublimed (>99.0% purity) M491 250 mg £660
Sublimed (>99.0% purity) M491 500 mg £1200
Sublimed (>99.0% purity) M491 1 g £2100

MSDS Documentation

Ir(btpy)3 MSDSIr(btpy)3 MSDS sheet

Literature and Reviews

  1. The Red Electroluminescence of Iridium Complex at Different Concentrations and Host Materials, W. Zhang et al., Appl. Mechanics and Mater., Ch. 2, 94-97 (2014); DIO: 10.4028/
  2. Structure–Property Relationship of Red- and Green-Emitting Iridium(III) Complexes with Respect to Their Temperature and Oxygen Sensitivity, N. Tian et al., Eur. J. Inorg. Chem. 2010, 4875–4885, DOI: 10.1002/ejic.201000610.
  3. Effect of Doping Phosphorescent Material and Annealing Treatment on the Performance of Polymer Solar Cells, Z. Wang et al., Inter. J. Photoenergy, 273586 (2013),
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