Controllable Eu 2+ -Doped Orthophosphate Blue-/Red-Emitting Phosphors: Charge Compensation and Lattice-Strain Control

Yi Wei, Junsong Gao, Gongcheng Xing, Guogang Li, Peipei Dang, Sisi Liang, Yu Shu Huang, Chun Che Lin, Ting Shan Chan, Jun Lin

研究成果: 雜誌貢獻文章同行評審

28 引文 斯高帕斯(Scopus)


Cation-substitution-induced controllable luminescence tuning could efficiently optimize and improve the luminescence performances of novel phosphor materials for realizing high-quality lighting. As important members of the orthophosphate family, ABPO 4 (A = alkali metal Li, Na, K, Rb, Cs; B = alkali earth metal Mg, Ca, Sr, Ba) offers an abundant cation lattice environment for rare earth ions. Herein, we successfully prepared a broad-band red-emitting CsMgPO 4 :Eu 2+ phosphor with an emission peak at 628 nm (fwhm = 118 nm). A series of cation-substitution strategies are designed to adjust and enhance its luminescence performances. The corresponding mechanisms are also investigated and proposed reasonably. A charge-compensation strategy of [Eu 2+ -Si 4+ ] ↠[Cs + -P 5+ ] could dramatically enhance the quenching concentration from 0.04 to 0.30, which is attributed to the decrease of Eu 3+ . Two cation-substitution strategies of larger Ba 2+ (Sr 2+ ) ions for Mg 2+ ions could achieve superior emission adjustment of Eu 2+ ions from the red to blue (yellow) region due to local lattice distortion. Interestingly, a consecutive emission adjustment from the red to blue region by simply changing the annealed temperature is reported for the first time, and the possible emission tuning mechanism is revealed based on a local lattice-strain control. This study could serve as a guide in developing Eu 2+ -activated ABPO 4 phosphors with improving luminescence performance and controllable luminescence adjustment based on charge compensation and lattice-strain control through various cation substitutions.
頁(從 - 到)6376-6387
期刊Inorganic Chemistry
出版狀態已發佈 - 5月 6 2019

ASJC Scopus subject areas

  • 物理與理論化學
  • 無機化學


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