Novel Cyan-Green-Emitting Bi³⁺-Doped BaScO₂F, R⁺ (R = Na, K, Rb) Perovskite Used for Achieving Full-Visible-Spectrum LED Lighting

Cyan-emitting phosphors are important for near-ultraviolet (NUV) light-emitting diodes (LEDs) to gain high-quality white lighting. In the present work, a Bi3+-doped BaScO2F, R+ (R = Na, K, Rb) perovskite, which emits 506 nm cyan-green light under 360 or 415 nm excitation, is obtained via a high-temperature solid-state method for the first time. The obtained perovskite shows improved photoluminescence and thermal stability due to the charge...