Preparation and performance of a new type of blue light-emitting material δ-Alq3

In this article, δ-Alq3 was synthesized by a novel method, which can act as a new type of blue light-emitting material. Performance of δ-Alq3 was investigated by SEM, UV–vis absorption spectra, photoluminescence (PL) spectra and electroluminescence (EL) spectra. Finally, it was concluded that grain shape of δ-Alq3 is close to column, absorption band of electron transition from HOMO orbit in phenoxide ring to LUMO orbit in pyridine ringis at 432 nm in UV–vis absorption spectra of δ-Alq3, optical band gap of δ-Alq3 is 2.71 eV, the maximum emission peak (λmax) of δ-Alq3 is at 480 nm in PL spectra, λmax of δ-Alq3 is 520 nm in EL spectra.