Unveiling photoluminescent response of Ce-doped CaCu3Ti4O12: An experimental-theoretical approach br

CaCu3Ti4O12: x% Ce (x = 0.00, 0.25, 0.50, 0.75, and 1.00) ceramic composites were prepared via solid-state reaction. Theoretical atomistic simulations were combined with experimental techniques to uncover Ce effects in the (micro)structure and photoluminescence of CaCu3Ti4O12-based ceramics. Application of perovskites ceramics in optoelectronics have been limited by their specific, narrow emission range, which compromise operational efficiency, pushing for the development of novel perovskite-emissive materials. This study results confirm that Ce ions are incorporated at Ca sites within the CaCu3Ti4O12 lattice, inducing point metal and oxygen vacancies in the optical bandgap region. Shallow-level defects (V-Ca/V-O ) were as-sociated with broadband violet-blue photoluminescent (PL) emissions. Better color rendering may be a direct consequence of crystalline field splitting/wider PL emission. Furthermore, results demonstrate that PL on CaCu3Ti4O12: Ce system intensity can be modulated by structural defects, making it promising for applications in optoelectronics. (C) 2022 Published by Elsevier B.V.

Automated summary

This study investigates the effects of Ce on the (micro)structure and photoluminescence of CaCu3Ti4O12 ceramics. Ce ions are found to be incorporated into the lattice, inducing point defects and oxygen vacancies in the optical bandgap region, resulting in broadband violet-blue photoluminescence.