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Product Code M2339A1
Price $250.00 ex. VAT

BPy-OXD, excellent ETL and HBL material

Used with electron donating materials to create highly efficient OLED devices

BPy-OXD, 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 for OLED devices page.

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 £200
Sublimed (>99.0% purity) M2339A1 250 mg £400
Sublimed (>99.0% purity) M2339A1 500 mg £680
Sublimed (>99.0% purity) M2339A1 1 g £1150

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.
  4. Enhancement of electron transport by horizontal molecular orientation of oxadiazole planar molecules in organic amorphous films, D. Yokoyama et al., Appl. Phys. Lett. 95, 243303 (2009); DOI: 10.1063/1.3274135.
  5. Molecular orientation in small-molecule organic light-emitting diodes, D Yokoyama, J. Mater. Chem., 21, 19187 (2011); DOI: 10.1039/c1jm13417e.
  6. Many Exciplex Systems Exhibit Organic Long-Persistent Luminescence, N. Nishimura et al., Adv. Funct. Mater., 30 (22), 2000795 (2020); DOI: 10.1002/adfm.202000795.

To the best of our knowledge the information provided here is accurate. However, Ossila assume no liability for the accuracy of this page. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. All products are for laboratory and research and development use only, and may not be used for any other purpose including health care, pharmaceuticals, cosmetics, food or commercial applications.

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