摘要：SummaryPhosphors with high quantum efficiency and thermal stability are greatly desired for lighting industries. Based on the design strategy of solid solution, a series of deep-blue-emitting phosphors (Sr0.99-xBax)2P2O7:0.02Eu2+(SBxPE x = 0–0.5) are developed. Upon excitation at 350 nm, the optimized SB0.3PE phosphor shows a relatively narrow full width at half maximum (FWHM = 32.7 nm) peaking at 420 nm, which matches well with the plant absorption in blue region. Moreover, this phosphor exhibits obvious enhancement of internal quantum efficiency (IQE) (from 74% to 100%) and thermal stability (from 88% to 108% of peak intensity and from 99% to 124% of integrated area intensity at 150°C) compared with the pristine one. The white LED devices using SB0.3PE as deep-blue-emitting component show good electronic properties, indicating that SB0.3PE is promising to be used in plant growth lighting, white LEDs, and other photoelectric applications.Graphical AbstractDisplay OmittedHighlights•A novel deep-blue-emitting phosphor (Sr0.69Ba0.3)2P2O7:0.02Eu2+is reported•Near-unit internal quantum efficiency is detected in (Sr0.69Ba0.3)2P2O7:0.02Eu2•The thermal stability of (Sr0.69Ba0.3)2P2O7:0.02Eu2+is significantly enhanced•The application in WLEDs based on (Sr0.69Ba0.3)2P2O7:0.02Eu2+is demonstratedInorganic Materials; Materials Application; Optical Materials
