Fabrication and photoluminescence characteristics of novel red-emitting Ba2LuNbO6:Eu3+ double-perovskite phosphors on near UV WLEDs

Haihong Guo, Ting Wang, Bitao Liu, Wei Gao, Liang Xiu, Zhenzhen Cui, Hao Zhang, Qianrui Ma, Shaoqing Wang, Ziyang Li, Longchao Guo, Guilong Yan, Siufung Yu, Xue Yu, Xuhui Xu, Jianbei Qiu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Red emitting phosphors play a significant role in accelerating the improvement of illumination quality for white light emitting diodes (WLEDs). In this work, by using solid-state reaction method, an efficient novel Ba2LuNbO6:Eu3+ phosphor with double-perovskite structure was successfully prepared. Here, a series of Ba2LuNbO6:Eu3+ red phosphors can be efficiently pumped by the near-ultraviolet (UV) light and then present high-brightness at orange emission (598 nm, 5D07F1) and red emission (610 nm, 5D07F2). The ratio values of 610 to 598 nm in Ba2LuNbO6:Eu3+ phosphors exceed 1 when the content of Eu3+ is larger than 0.4 mol, because the occupation of Eu3+ ions is changed from Lu3+ ions with symmetric sites to Ba2+ ions with asymmetric sites. Besides, the optimized concentration of Eu3+ at the 5D07F2 transitions is obtained when x = 1, indicating that there is non-concentration quenching in Ba2LuNbO6:Eu3+ phosphors. Moreover, the CIE chromaticity coordinates of Ba2LuNbO6:Eu3+ was calculated to be (0.587, 0.361), the color purity was calculated to be 72.26% and internal quenching efficiency (IQE) was measured to be 67%. Finally, the thermal stability of Ba2LuNbO6:Eu3+ phosphors was also studied. Our work demonstrates that the novel double-perovskite red-emitting Ba2LuNbO6:Eu3+ phosphors are prospective red emitting elements for WLEDs applications.

Original languageEnglish
JournalJournal of Rare Earths
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • BaLuNbO:Eu phosphors
  • Double-perovskite
  • Non-concentration quenching
  • Rare earths
  • Red emitting

ASJC Scopus subject areas

  • Chemistry(all)
  • Geochemistry and Petrology

Fingerprint

Dive into the research topics of 'Fabrication and photoluminescence characteristics of novel red-emitting Ba2LuNbO6:Eu3+ double-perovskite phosphors on near UV WLEDs'. Together they form a unique fingerprint.

Cite this