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Product Code M451-250mg
Price £180 ex. VAT

OXD-7, high efficiency ETL material

With PVK, good solubility and film morphology


1,3-bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazo-5-yl]benzene (OXD-7) is a well known electron-transporting material due to the electron-accepting property of the oxadiazole units. Together with poly(9-vinylcarbazole) (PVK, electron donating), OXD-7 (electron withdrawing) is the most widely used hybrid-type host due to its good solubility and film morphology by the bulky tert-butyl units.

OXD-7 has also been used as an ultraviolet emitter, with MoO3 as hole injection and buffer material showing relatively high external quantum efficiency [1].

General Information


CAS number 138372-67-5
Chemical formula C30H30N4O2
Molecular weight 478.58 g/mol
Absorption λmax 292 (THF)
Fluorescence λem 347 nm (THF)
HOMO/LUMO HOMO = 6.5 eV, LUMO = 3.0 eV
Synonyms
  • 1,3-Bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazo-5-yl]benzene
  • 1,3-Bis[5-(4-tert-butylphenyl)-2-[1,3,4]oxadiazolyl]benzene
Classification / Family

Electron-injection materials, Electron transporting materials, Phosphorescent host materials, Organic light-emitting diodes, Organic electronics

Product Details


Purity > 99.0% (sublimed)
Melting point 241 °C (lit.)
Colour 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


OXD-7 chemical structure
Chemical Structure of 1,3-bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazo-5-yl]benzene (OXD-7)

Device Structure(s)


Device structure ITO/PEDOT:PSS/PVK:OXD-7:TPD:(Et-Cvz-PhQ)2Ir(pic)*/OXD-7 (20 nm)/Ba (3 nm)/Al (100 nm) [6]
Colour Red red light emitting device
Max. Current Efficiency 17.5 cd/A
Max. EQE 10.6%
Max. Power Efficiency 6.42 lm W1

Device structure

ITO/PEDOT:PSS(40 nm)/mCP:PVK:OXD-7(33:33:22 wt%):
(dfpmpy)2Ir(pic-N-O):(F4PPQ)2Ir(pic-N-O):
(EO2- Cz-PhQ)2Ir(acac)*(12:0.25:0.15 wt%)
(50-60 nm)/TmPyPB(20 nm)/LiF(1 nm)/Al(150 nm) [7]
Colour White white light emitting device
Max. EQE

11.45%

Max. Current Efficiency 23.04 cd/A
Max. Power Efficiency 8.04 lm W1
Device structure ITO/PEDOT:PSS/NPB/mCP/FPt*(1.5 nm)/OXD-7/CsF/Al [8]
Colour White white light emitting device
Max. EQE 17.5%
Max. Power Efficiency 45 lm W1
Device structure ITO/ PEDOT:PSS 1.5 (75 nm)/PVK:OXD-7:complex 5 (100:37:8 w/w) (80 nm)/Ba (4 nm)/Al (100 nm) [9]
Colour Blue blue light emitting device
Max. EQE 8.7%
Max. Current Efficiency 19.1 cd/A
Max. Power Efficiency 6.6 lm W1
Device structure ITO/PEDOT:PSS/ PVK :OXD-7:Ir(mppy)3 (60:40:4, w/w)/TrOH*/Al [10]
Colour Green green light emitting device
Max. Luminance 18,050
Max. EQE 6.7%
Max. Current Efficiency 23.4 cd/A
Device structure ITO/MoOx/PVK:OXD-7:FIrpic (70:30:10/B1Mo/Al [11]
Colour Blue blue light emitting device
Max. Luminance 42,000
Max. EQE 15.4%
Max. Current Efficiency 30 cd/A
Max. Power Efficiency 12.5 lm W1
Device structure ITO/PEDOT:PSS/PVK:OXD-7:FIrpic (60:40:10 w/w, 70 nm)/SPDP* (15 nm) LiF (1 nm)/Al (100 nm) [12]
Colour Blue blue light emitting device
Max. EQE 19.6%
Max. Current Efficiency 33.6 cd/A
Max. Power Efficiency 10.6 lm W1

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

Characterisation


1H NMR oxd-7
11H NMR of 1,3-bis[2-(4-tert-butylphenyl)-1,3,4-oxadiazo-5-yl]benzene (OXD-7) in CDCl3

Pricing


Grade Order Code Quantity Price
Sublimed (>99% purity) M451 250 mg £180
Sublimed (>99% purity) M451 500 mg £320
Sublimed (>99% purity) M451 1 g
£500

MSDS Documentation


OXD-7 MSDSOXD-7 MSDS sheet

Literature and Reviews


  1. <Highly efficient ultraviolet organic light-emitting diodes and interface study using impedance spectroscopy, Q. Zhang et al., Electron Optics, 126 (18), 1595-1597 (2015).
  2. Small Molecule Host Materials for Solution Processed Phosphorescent Organic Light-Emitting Diodes, K. Yook et al., Adv. Mater., 26, 4218–4233 (2014).
  3. High power efficiency solution-processed double-layer blue phosphorescent organic light-emitting diode by controlling charge transport at the emissive layer and heterojunction, K. Yeoh et al., Phys. Status Solidi RRL 7, No. 6, 421–424 (2013) / DOI 10.1002/pssr.201307089.
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