CaY2Si2S8:Ce3+: a novel green-emitting thiosilicate phosphor for white light-emitting diodes
作者： Szu-Ping Lee , Chien-Hao Huang , Teng-Ming Chen
DOI: 10.1039/C4TC01572J
关键词:
摘要: A novel green-emitting Ce3+-doped CaY2Si2S8 thiosilicate phosphor was synthesized by using solid-state methods in a sealed silica ampoule. This compound could be excited over broad range from UV to blue light (400–450 nm) and generated broadband emission peaking at ∼495 nm, with quantum efficiency of ∼57%, which is promising for lighting applications. Temperature-dependent optical measurements CaY2Si2S8:Ce3+ 25 225 °C were performed. In addition, white LED device fabricated the commercially-available red-emitting CaAlSiN3:Eu2+ pumped 450 nm chip. The CRI value CCT measured 91–95 3800–8600 K, respectively, showing potential preparation, spectroscopic characterization, efficiency, decay lifetime, thermal stability, related data are also presented.
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