Facile one-step synthesis and luminescent properties of red-emitting Ca2Si5N8:Eu2+ phosphors. (6th December 2017)

• Record Type: Journal Article
• Authors: Wang, Y.; Wang, Y. L.; Shao, Y. R.; Wang, M.; Zhu, Y. C.
• Is Part Of: Materials technology. Volume 32:Number 14(2017)
• Page Start: 845
• Page End: 851
• Publication Date: 2017-12-06
• Subjects: Ca2Si5N8 -- red phosphors -- luminescence; Materials -- Periodicals; Materials science -- Periodicals; Materials -- Technological innovations -- Periodicals; 620.1105
• DOI: 10.1080/10667857.2017.1342892
• Languages: English
• ISSNs: 1066-7857

Abstract

Abstract: Ca2 Si5 N8 :Eu 2+ phosphors have been synthesised in a facile one-step route using raw materials including α-Si3 N4, CaCO3, Ca(CH3 COO)2 and Eu2 O3 . Compared with the prevailing conventional methods, an inexpensive and simple method under atmospheric pressure with a relative short reaction time is achieved. The reaction process is optimised to obtain Ca2 Si5 N8 :Eu 2+ phosphors with high crystallinity and purity. The phosphors exhibit a red emission peaking at 592 nm under a blue light radiation and show a broad excitation band between 250 and 550 nm. The characteristics of broad excitation band and red emission imply a promising application in blue light-based red light-emitting diode and white light-emitting diode (LED). These results indicate a promising prospect for the efficient and economic route in preparing Ca2 Si5 N8 :Eu 2+ phosphors for LED applications.