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

Product Details

*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

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
Max. Current Efficiency	17.5 cd/A
Max. EQE	10.6%
Max. Power Efficiency	6.42 lm W−1

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
Max. EQE	11.45%
Max. Current Efficiency	23.04 cd/A
Max. Power Efficiency	8.04 lm W−1

Device structure	ITO/PEDOT:PSS/NPB/mCP/FPt*(1.5 nm)/OXD-7/CsF/Al [8]
Colour	White
Max. EQE	17.5%
Max. Power Efficiency	45 lm W−1

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
Max. EQE	8.7%
Max. Current Efficiency	19.1 cd/A
Max. Power Efficiency	6.6 lm W−1

Device structure	ITO/PEDOT:PSS/ PVK :OXD-7:Ir(mppy)3 (60:40:4, w/w)/TrOH*/Al [10]
Colour	Green
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
Max. Luminance	42,000
Max. EQE	15.4%
Max. Current Efficiency	30 cd/A
Max. Power Efficiency	12.5 lm W−1

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
Max. EQE	19.6%
Max. Current Efficiency	33.6 cd/A
Max. Power Efficiency	10.6 lm W−1

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

Characterisation

Pricing

MSDS Documentation

OXD-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.
4. Highly efficient solution processed blue organic electrophosphorescence with 14lm∕W luminous efficacy, M. K. Mathai et al., Appl. Phys. Lett. 88, 243512 (2006); http://dx.doi.org/10.1063/1.2212060.
5. Efficient solution-processed small-molecule single emitting layer electrophosphorescent white light-emitting diodes, L. Hou et al., Org. Electronics, 11 (8), 1344-1350 (2010), doi:10.1016/j.orgel.2010.05.015.
6. High efficiency, solution-processed, red phosphorescent organic light-emitting diodes from a polymer doped with iridium complexes, M. Song et al., Org. Electronics, 10 (7), 1412–1415 (2009), doi:10.1016/j.orgel.2009.07.012.
7. Single emissive layer white phosphorescent organic light-emitting diodes based on solution-processed iridium complexes, W. Cho et al., Dyes and Pigments, 108, 115-120 (2014), doi:10.1016/j.dyepig.2014.04.033.
8. Efficient organic light-emitting devices with platinum-complex emissive layer, X. Yang et al., Appl. Phys. Lett., 98, 033302 (2011); doi: 10.1063/1.3541447.
9. Cyclometalated Ir(III) Complexes for High-Efficiency SolutionProcessable Blue PhOLEDs, V. Kozhevnikov et al., Chem. Mater., 25, 2352−2358 (2013); dx.doi.org/10.1021/cm4010773.
10. Efficient phosphorescent polymer light-emitting devices using a conjugated starburst macromolecule as a cathode interlayer, X. Zhang et al., RSC Adv., 6, 10326 (2016); DOI: 10.1039/c5ra19156d.
11. Water-Soluble Lacunary Polyoxometalates with Excellent Electron Mobilities and Hole Blocking Capabilities for High Efficiency Fluorescent and Phosphorescent Organic Light Emitting Diodes, M. Tountas et al., Adv. Funct. Mater. 2016; DOI: 10.1002/adfm.201504832.
12. New sulfone-based electron-transport materials with high triplet energy for highly efficient blue phosphorescent organic light-emitting diodes, S. Jeon et al., J. Mater. Chem. C, 2, 10129-10137 (2014); DOI: 10.1039/C4TC01474J.

To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.