FREE shipping to on qualifying orders when you spend or more, processed by Ossila BV. All prices ex. VAT. Qualifying orders ship free worldwide! Fast, secure, and backed by the Ossila guarantee. It looks like you are visiting from , click to shop in or change country. Orders to the EU are processed by our EU subsidiary.

It looks like you are using an unsupported browser. You can still place orders by emailing us on, but you may experience issues browsing our website. Please consider upgrading to a modern browser for better security and an improved browsing experience.

Product Code M381-5g
Price $263 ex. VAT

Alq3, effective electron-transport material for OLEDs

High thermal stability and quantum yield of fluorescence

Tris(8-hydroxyquinoline)aluminum(III), commonly known as Alq3 (CAS number 2085-33-8), 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.

Ossila's Alq3 was used in the high-impact paper (IF 30.85)

Alq3 from Ossila was used in the high-impact paper (IF 30.85), Engineering Band-Type Alignment in CsPbBr3 Perovskite-Based Artificial Multiple Quantum Wells, K. Lee et al., Adv. Mater., 33 (17), 2005166 (2021); DOI: 10.1002/adma.202005166.

Alq3 as the electron-transport and emitting layer material was the first efficient low molecular weight OLED reported by Tang in 1987 [1]. Since then, metaloquinolates have become the focus of new electroluminescent materials research, with Alq3 being the most studied.

General Information

Full name Tris(8-hydroxyquinoline)aluminum
  • Alq3 
  • 8-Hydroxyquinoline aluminum salt
  • Aluminum 8-hydroxyquinolinate
  • Aluminum oxinate
  • Tris(8-hydroxyquinolinato)aluminum
CAS number 2085-33-8 
Molecular formula C27H18AlN3O3
Molecular weight 459.43 g/mol
Absorption λmax 259 nm (in THF)
Fluorescence 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)

Product Details

Purity >99% (sublimed)
Melting point 415.4 °C (DSC onset)
Appearance Yellow-greenish powder

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

Chemical Structure

Chemical structure of Alq3
Chemical structure of tris-(8-hydroxyquinoline)aluminum (Alq3)

Device Structure(s)

Device structure ITO/ NPB(60 nm)/Alq3:DCM(7nm)/BCP(12 nm)/ Alq3(36nm)/ MgAg(200 nm) [2]
Colour Red red light emitting device
Max. Luminance 1, 000 cd/m2
Max. Current Efficiency 5.66 cd/A 
Device structure  ITO/m-MTDATA:MoOx (3:1, 15 nm)/m-MTDATA (30 nm)/NPB (5 nm)/Alq3 (50 nm)/BPhen (10 nm)/LiF (1 nm)/Al (100 nm) [3]
Colour Green green light emitting device
Max. Luminance 42,090 cd/m2 
Max. Current Efficiency 4.77 cd/A
Max. Power Efficiency 3.5 lm W1
Device structure  ITO/α-NPD* (50 nm)/7%-Ir(ppy)3:CBP (20 nm)/BCP (10 nm)/Alq3 (40 nm)/Mg–Ag (100 nm)/Ag (20 nm) [4]
Colour Green green light emitting device
Max EQE (12.0±0.6)%
Max. Powder Efficiency (45±2) lm W1
Device structure ITO/NPB (30 nm)/NPB: DCJTB: C545T* (10 nm)/NPB (4 nm)/DNA (8 nm)/(BCP) (9 nm)/Alq3 (30 nm)/LiF (1 nm)/Al (100 nm) [5]
Colour White white light emitting device
Max. Luminance  13,600 cd/m2
Max. Current Efficiency 12.3 cd/A
Max. Power Efficiency 4.4 lm W1
Device structure ITO/2-TNATA:33% WO3 (100 nm)/NPB (10 nm)/Alq3 (30 nm)/Bphen (20 nm)/BPhen: 2% Cs (10 nm)/Al (150 nm) [6]
Colour Green green light emitting device
Operating Voltage for 100 cd/m2 3.1 V
Current Efficiency for 20 mA/cm2 4.4 cd/A
Power Efficiency for 20 mA/cm2 3.3 lm W1
Device structure ITO/CuPc(6.0 nm)/[NPB*(3.8 nm)/CuPc (1.5 nm)]4/NPB (15.0 nm)/Alq3 (60.0 nm)/Mg:Ag/Ag [7]
Colour Green green light emitting device
Max. Luminance 15,000 cd/m2
Max. Current Efficiency 10.8 cd/A

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

When fabricating devices, processing and handling materials in a glove box helps maintain their purity and maintain efficiency by avoiding contamination from particulates, moisture, and airborne impurities.



DSC trace of Tris-(8-hydroxyquinoline)aluminum (Alq3)


Grade Order Code Quantity Price
Sublimed (>99% purity) M381 5 g £210
Sublimed (>99% purity) M381 10 g £340

MSDS Documentation

Alq3 MSDSAlq3 MSDS sheet

Literature and Reviews

  1. Organic electroluminescent diodes, C. Tang et al., Appl. Phys. Lett. 51, 913 (1987)
  2. 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 .
  3. 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.
Return to the top