Preparation and Photophysical Characterization of New Anthracene‐ and Tetracene‐Doped Acenaphthene Luminophores

ABSTRACT The photophysical characterization of acenaphthene (Acnp)‐doped luminophores has been carried out. The host Acnp acts as a donor while carefully selected dopants, anthracene (AN) and tetracene (TN), act as acceptors. The doping of minimal quantities of AN entirely quenches the weak violet fluorescence of Acnp, resulting in the production of AN‐like emission in the doped Acnp matrix. The addition of the second guest, TN, not only quenches the AN‐like emission but also acts as a wavelength shifter. The tricomponent AN and TN‐doped Acnp luminophores emit in the green region. The TN monomeric emission has been achieved in the Acnp matrix. The shifting of the emission from the blue to the green region is mainly attributed to the‐two step excitation energy transfer (EET) process. The time‐resolved fluorescence study has also been carried out to establish the energetic interactions between donors and acceptors. The prepared luminophores were further characterized by XRD, scanning electron microscopy (SEM), TGA, and cyclic voltammetry (CV) to study their structural parameters, surface morphology, thermal stability, and electrical properties, respectively. The prepared novel Acnp luminophores exhibit two‐step EET from the host Acnp to AN and then to TN in the Acnp matrix. Due to their good emissive and electrochemical properties, they can be used in emissive layers of optoelectronic and organic light‐emitting devices.