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Product Code M2339A1-100mg
Price £220 ex. VAT

BPy-OXD, excellent ETL and HBL material

Used with electron donating materials to create highly efficient OLED devices

BPy-OXD (CAS number 866117-19-3), namely 1,3-Bis[2-(2,2'-bipyridine-6-yl)-1,3,4-oxadiazo-5-yl]benzene, is a bipyridyl-substituted oxadiazole derivative with a symmetrical chemical structure of two bipyridyl oxadiazole units being attached on a benzene ring at meta-positions.

Due to the electron deficient nature of both bipyridine and oxadiazole, BPy-OXD has excellent electron accepting, electron transporting, and hole blocking abilities. It also exhibits electrical operation durability with a high glass transition temperature (Tg = 106 ℃). The electron mobility in the vacuum-deposited films of Bpy-OXD is 30 times higher than that of OXD-7.

Compared to OXD-7, which has bulky tert-butyl terminals, BPy-OXD is completely planar due to the intramolecular H---N hydrogen bonding. This leads to significantly large anisotropy of molecular orientation in the film.

BPy-OXD can also be used with electron donating materials, i.e. m-MTDATA, to form exciplexes as active emitting layer materials for highly efficient OLED devices.

General Information

CAS number 866117-19-3
Full name 1,3-Bis[2-(2,2'-bipyridine-6-yl)-1,3,4-oxadiazo-5-yl]benzene
Chemical formula C30H18N8O2
Molecular weight 522.52 g/mol
Absorption λmax 276 nm, 308 nm (in THF)
Phosphorescene λmax 348 nm (in THF)
HOMO/LUMO HOMO = 6.60 eV, LUMO = 2.90 eV [1]
Synonyms Bpy-OXDm
Classification / Family Oxadiazole derivatives, Electron transport layer, Hole blocking layer, Phosphorescent host materials, Light-emitting diodes, Organic electronics, , Sublimed materials.

Product Details

Purity Sublimed >99.0% (HPLC)
Melting point Tg = 106 ℃
Appearance White powder/crystals

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

Chemical Structure

Bpy-OXD chemical structure CAS 866117-19-3
Chemical structure of BPy-OXD, CAS 866117-19-3

Device Structure(s)

Device structure ITO/2-TNATA (10 nm)/NPB (30 nm)/TCTA (10 nm)/CBP:6 wt% Ir(ppy)3 (30 nm)/BCP (10 nm)/Bpy-OXD (30 nm)/LiF/Al [2]
Colour green light emitting device Green
Max. Current Efficiency 35.42 cd/A
Max. EQE 10.16%
Device structure ITO/2-TNATA (10 nm)/NPB (30 nm)/TCTA (10 nm)/CBP:6 wt% Ir(ppy)3 (30 nm)/Bphen (10 nm)/Bpy-OXD (30 nm)/LiF/Al [2]
Colour green light emitting device Green
Max. Current Efficiency 43.18 cd/A
Max. EQE 12.10%
Device structure ITO/2-TNATA (10 nm)/NPB (30 nm)/TCTA : 10 nm)/CBP : 6 wt% Ir(ppy)3 (20 nm)/Bpy-OXD:6 wt% Ir(ppy)3 (10 nm)/Bphen(10 nm)/Bpy-OXD (30 nm)/LiF/Al [3]
Colour green light emitting device Green
Max. Current Efficiency 56.75 cd/A
Max. EQE 15.49%

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


Grade Order Code Quantity Price
Sublimed (>99.0% purity) M2339A1 100 mg £220
Sublimed (>99.0% purity) M2339A1 250 mg £440
Sublimed (>99.0% purity) M2339A1 500 mg £740
Sublimed (>99.0% purity) M2339A1 1 g £1250

MSDS Documentation


Literature and Reviews

  1. Bipyridyl oxadiazoles as efficient and durable electron-transporting and hole-blocking molecular materials, M. Ichikawa et al., J. Mater. Chem., 16, 221-225 (2006); DOI: 10.1039/B510720B.
  2. Enhanced electroluminescence and reduced efficiency roll-off in electrophosphorescent devices using a very high electron mobility material as emitter host and electron transporter, T. Li et al., J. Phys. D: Appl. Phys. 42, 065103 (2009); DOI: 10.1088/0022-3727/42/6/065103.
  3. Reduced efficiency roll-off in phosphorescent organic light emitting diodes at ultrahigh current densities by suppression of triplet-polaron quenching, F. Zang et al., Appl. Phys. Lett. 93, 023309 (2008); DOI: 10.1063/1.2955527.
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