Fluorescence-based organic light-emitting diodes (OLEDs) are explicitly appealing due to their extended operational lifetimes, high color purity of electroluminescence, and unmatched potential for low-cost manufacturing in next-generation full-color display and lighting applications.Here, we designed N-substituted acridone-dibenzoazepine derivatives (Aze-Me-Acr and Aze-Anisyl-Acr).Twisted electron rich dibenzoazepine provides limited rotation at donor-acceptor bond.Both, Aze-Me-Acr and Aze-Anisyl-Acr show solvent polarity dependent fluorescence in a range of 490 to 525 nm at room temperature (RT), whereas at 77 K, triplet emission at around 620 nm was observed having life time of ∼435-547 ms.Both these emitters showed dual emission i.e., fluorescence and phosphorescence in powder form.Fluorescence was observed at 550 & 544 nm while phosphorescence was seen at 670 & 655 nm, resp. for Aze-Me-Acr and Aze-Anisyl-Acr.Long excited lifetimes in the range of 8 to 15 μs were found in red region (>600 nm).OLEDs with Aze-Me-Acr and Aze-Anisyl-Acr as active emitters were also fabricated which showed green (CIE: 0.28, 0.65) and yellowish green (CIE: 0.39, 0.56) electroluminescence, resp.Doped devices of Aze-Me-Acr in CBP blend resulted in high external quantum efficiency (EQE) of 12.8 %.