Tuning electroluminescence performance in Pr-doped piezoelectric bulk ceramics and composites

Alternating current electroluminescence (ACEL) shows great potential in lighting, display and intelligent skin. Herein, the ACEL properties of Pr3+-doped Ba0·85Ca0·15Ti0·90Zr0·10O3 ceramic its PDMS-based composite have been investigated. Intense red EL emission was obtained sample whereas blue Pr3+ observed for first time counterpart. The should be attributed to impact hot electrons driven by large piezoelectric electric field. Owing cross-relaxations through 4f5d levels Pr-to-metal charge transfer state, 3PJ emissions were completely quenched, thus leading an enhancement emission. However, external E field induced a local deformation particles embedded PDMS matrix, which turn caused bending CB then downwards shift from CB. Hence hindered, composites. results would attract attention functional materials studies expand our understanding such facile structure oxide devices facilitate their use integral part flexible device systems.