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Tris(8-hydroxyquinoline)aluminum(III), commonly known as Alq3, is widely used in organic light-emitting diodes (OLEDs) as an electron-transport material (ETM) and emitting layer material (ELM) due to its high thermal stability, high quantum yield of fluorescence and high electron-transport ability.
Alq3 as the electron-transport and emitting layer material was the first efficient low molecular weight OLED reported by Tang in 1987 . Since then, metaloquinolates have become the focus of new electroluminescent materials research, with Alq3 being the most studied.
8-Hydroxyquinoline aluminum salt
λmax 259 nm (in THF)
λmax 512 nm (in THF)
HOMO / LUMO
HOMO 5.62 eV LUMO 2.85 eV
Classification / Family
Organometallic, Electron transport layer (ETL), Electron injection layer (EIL), OLED emitting layer (ELM)
Organic electroluminescent diodes, C. Tang et al., Appl. Phys. Lett. 51, 913 (1987)
High-efficiency red electroluminescence from a narrow recombination zone confinedby an organic double heterostructure, Z. Xie et al., Appl. Phys. Lett., 79, 1048 (2001); doi: 10.1063/1.1390479 .
Very low turn-on voltage and high brightness tris-(8-hydroxyquinoline) aluminumbasedorganic light-emitting diodes with a MoOx p-doping layer, G. Xie et al., Appl. Phys. Lett., 92, 093305 (2008); doi: 10.1063/1.2890490.
Efficient electrophosphorescence using a doped ambipolar conductive molecular organic thin film, C. Adachi et aL., Org. Electronics, 2(1), 37-43 (2001), doi:10.1016/S1566-1199(01)00010-6.
High efficiency white organic light-emitting devices by effectively controlling exciton recombination region, F. Guo et al., Semicond. Sci. Technol. 20, 310–313 (2005).
Highly Power Efficient Organic Light-Emitting Diodes with a p-Doping Layer, C-C. Chang et al., Appl. Phys. Lett., 89, 253504 (2006); doi: 10.1063/1.2405856.
Organic light-emitting diodes with improved hole-electron balance by using copper phthalocyanine/aromatic diamine multiple quantum wells, Y. Qiu et al., Phys. Lett., 80, 2628 (2002); Appl. doi: 10.1063/1.1468894.
Molecular Orbital Study of the First Excited State of the OLED Material Tris(8-hydroxyquinoline)aluminum(III), M. D. Halls et al., Chem. Mater., 13 (8), 2632–2640 (2001), DOI: 10.1021/cm010121d.
Organic electroluminescent devices with improved stability, S. A. Van Slyke et al., Appl. Phys. Lett. 69, 2160 (1996); http://dx.doi.org/10.1063/1.117151
Metal−Alq3 Complexes: The Nature of the Chemical Bonding, A. Curioni et al., J. Am. Chem. Soc., 121 (36), pp 8216–8220 (1999).
Enhancement of power conversion efficiency of P3HT:PCBM solar cell using solution processed Alq3 film as electron transport layer, B. Y. Kadem et al., J Mater Sci: Mater Electron 26:3976–3983 (2015), DOI 10.1007/s10854-015-2933-3.
The impurity effects on OLEDs via transient electroluminescence analysis, C.-F. Lin et al., IEEE 17-20 (2015), 10.1109/AM-FPD.2015.7173184.
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.