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In Situ Purification of Organic Materials for Organic Light-Emitting Device Fabrication

A simple, direct route to purify, as-deposited, materials for the fabrication of organic light emitting devices (OLEDs) is reported. In situ purification of 8-tris-hydroxyquinoline aluminum (Alq3) can lead to devices with electroluminescence characteristics comparable to those of devices made with materials pre-purified via traditional separation processes such as recrystallization or vacuum sublimation.