Chemical and physical changes of tris(8-hydroxyquinoline)aluminum (Alq3), which is commonly used as electron transporting materials and green-emitting materials in organic light emitting diodes (OLEDs), occurring during long-term thermal stability tes...
Chemical and physical changes of tris(8-hydroxyquinoline)aluminum (Alq3), which is commonly used as electron transporting materials and green-emitting materials in organic light emitting diodes (OLEDs), occurring during long-term thermal stability test under high-vacuum and thermal stress was investigated. To test for thermal stability of the Alq3 molecule under vacuum over time, its temperature was maintained at its conventional evaporation temperature(573K). after a total test time of around 15 hours, crystalline phase and photoluminescence of tested materials, and electroluminescence and lifetime of devices fabricated from them were characterized using X-ray diffractometer, infrared spectroscopy, PL spectrometer, and spectrophotometer.