Journal of Inorganic Materials ›› 2016, Vol. 31 ›› Issue (6): 652-660.doi: 10.15541/jim20150597

• Orginal Article • Previous Articles     Next Articles

Role of Fluxes in the Synthesis and Luminescence Properties of Ba3Si6O12N2:Eu2+ Oxynitride Phosphors by Microwave Sintering

Bin HAN1,2, Yi-Fei WANG2(), Qian LIU3, Qing HUANG2()   

  1. 1. Institute of Materials, Shanghai University, Shanghai 200072, China
    2. Engineering Laboratory of Specialty Fibers and Nuclear Energy Materials, Ningbo Institute of Materials Engineering and Technology, Chinese Academy of Sciences, Ningbo 315201, China
    3. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
  • Received:2015-12-01 Online:2016-06-20 Published:2016-05-19
  • About author:HAN Bin(1991–), male, candidate of Master degree. E-mail: hanbin@nimte.ac.cn
  • Supported by:
    Zhejiang Provincial Natural Science Foundation of China (R12E020005, LQ14E020007);Natural Science Foundation of Ningbo (2013A610027);State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Chinese Academy of Sciences (SKL201307SIC);Research Fund for the Postdoctoral Advanced Program of Zhejiang Province (BSH1301022);Ningbo International Cooperation (2015D10009)

Abstract:

Eu2+ activated Ba3Si6O12N2 oxynitride green phosphors were synthesized by microwave sintering method with the aid of fluxes, namely BaCl2, H3BO3, KF, and NH4F. We employed a combination of X-ray diffraction, photoluminescence spectra and scanning electron microscopy measurements, in conjunction with detailed quantum efficiency (QE), life time and thermal quenching studies of luminescence properties to understand the origins of the improved luminescence properties. The results showed that the photoluminescence intensity of the phosphors was increased obviously by using varied fluxes and the intensity rise was recorded in order of fluxes as following: H3BO3 > KF > BaCl2 > no flux > NH4F. The maximum emission intensity of the Ba3Si6O12N2:Eu2+ phosphor was achieved at containing 1.0wt% H3BO3, due to the high crystallinity, narrow particle-size distribution and smooth surface, which showed low thermal quenching, shorter life time and increased external quantum efficiency, compared with that of the sample with other fluxes or without flux.

Key words: oxynitride phosphor, flux, microwave sintering, quantum efficiency

CLC Number: 

  • TQ174