Journal of Inorganic Materials ›› 2016, Vol. 31 ›› Issue (10): 1058-1062.DOI: 10.15541/jim20160104

• Orginal Article • Previous Articles     Next Articles

Preparation and Modified Upconversion Luminescence In NaGd(WO4)2:Yb3+/Tm3+ Inverse Opal Photonic Crystals

WANG Yun-Feng, SONG Jin-Fan, TANG Xiao-Yan, HU Dong-Mei   

  1. (School of Electronic and Electrical Engineering, Nanyang Institute Of Technology, Nanyang 473061, China)
  • Received:2016-02-26 Revised:2016-06-13 Published:2016-10-20 Online:2016-09-23
  • About author:WANG Yun-Feng. E-mail: wyf900222@163.com
  • Supported by:
    Key Research Foundation of The Higher Education Institutions of Henan Province (16A510008)

Abstract:

Photonic crystal (PC) possesses long-scale periodicity and has been widely applied in modifying visible and near-infrared photonic band gap. One of the extraordinary properties of the PCs is the modulation on spontaneous emission of embedded luminescence centers. In this study, three-dimensional NaGd (WO4)2:Yb3+/Tm3+ inverse opal photonic crystals (IOPC) with highly oridered periodic structure were prepared by self-assembly method using PMMA as template. The modulation effect of PC on emission spectra and dynamics of Tm3+ ions were systemically studied. In NaGd (WO4)2:Yb3+/Tm3+ inverse opal photonic crystals, due to unique cavity structure and photonic band gap effect, the emission line of 1G4-3H6 transition decreases by ~45% and the spontaneous radiation rate is suppressed by ~30%. Meanwhile, the up-conversion local thermal effect is largely suppressed. This experimental analysis indicates that the IOPC structure is an effective device for improving efficiency of up-conversion luminescence.

Key words: rare earth doping, NaGd(WO4)2, photonic crystal, spontaneous emission, modification

CLC Number: