Acta Chimica Sinica ›› 2023, Vol. 81 ›› Issue (7): 771-776.DOI: 10.6023/A23050209 Previous Articles     Next Articles



陈慧敏a,*(), 王龙a, 张盼c, 白西林a, 周国君b,*()   

  1. a 山西师范大学 物理与信息工程学院 太原 030031
    b 山西师范大学 化学与材料科学学院 太原 030031
    c 南开大学 物理科学学院 天津 300071
  • 投稿日期:2023-05-06 发布日期:2023-05-31
  • 基金资助:
    国家自然科学基金(52202177); 山西省基础研究计划(202103021223262); 山西省基础研究计划(20210302124054); 及山西师范大学自然科学基金(JCYJ2022015)

Investigation on Photoluminescence and Mechanoluminescence of Single Tb3+-doped Intense Green Phosphor

Huimin Chena(), Long Wanga, Pan Zhangc, Xilin Baia, Guojun Zhoub()   

  1. a College of Physics and Information Engineering, Shanxi Normal University, Taiyuan 030031
    b College of Chemistry and Material Science, Shanxi Normal University, Taiyuan 030031
    c School of Physics, Nankai University, Tianjin 300071
  • Received:2023-05-06 Published:2023-05-31
  • Contact: *E-mail:;
  • Supported by:
    National Natural Science Foundation of China(52202177); Fundamental Research Program of Shanxi Province(202103021223262); Fundamental Research Program of Shanxi Province(20210302124054); Natural Science Foundation of Shanxi Normal University(JCYJ2022015)

Mechanoluminescent (ML) materials can directly convert mechanical energy into optical energy and play a significant role in stress monitoring, anti-counterfeiting, etc. However, most of green ML materials need to be synthesized under high temperature and reducing atmosphere, which makes the development of green ML materials urgent. Rare earth ion Tb3+ is regarded as one of the most potential activators in green phosphor materials. In this work, novel single Tb3+-doped β-KMg(PO3)3 green phosphors were synthesized via high temperature solid state method. The structure was characterized via X-ray diffraction (XRD) and scanning electron microscope (SEM). The photoluminescent (PL) properties were studied by excitation and emission spectra. It shows strong f-f transition excitation peaks in the UV region with a high quantum yield of 90.74%. The color coordinate of β-KMg(PO3)3:Tb3+ is close to that of commercial green phosphor, resulting from the 5D4-7FJ (J=6, 5, 4, 3) transition emission of Tb3+. Tb3+ occupies Mg2+ sites, and the defects caused by charge difference are verified by thermoluminescence (TL). The existence of multiple trap levels makes the phosphors possess excellent thermal stability. More importantly, β-KMg(PO3)3:Tb3+ exhibits outstanding ML properties. The trap levels formed by the defects play a significant role in the process of ML. Under the stimulation of mechanical stress, the electrons and holes in the trap levels are released to the excited states and ground states of Tb3+ respectively, and the 5D3-7FJ (J=6, 5, 4) and 5D4-7FJ (J=6, 5, 4, 3) transitions of Tb3+ are realized. Both the powders and the polydimethylsiloxane (PDMS) composite materials show excellent PL and ML properties. The high sensitivity to stress is attributed to the flexible structural framework of β-KMg(PO3)3, which is easy to generate high strain energy. The materials have promising application prospect in solid state lighting, display and stress sensing.

Key words: rare earth ion Tb3+, β-KMg(PO3)3, photoluminescence, mechanoluminescence, defect