Related Experiment Video
Updated: May 8, 2025
High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis
Published on: September 22, 2017
Self-recoverable broadband near infrared mechanoluminescence from BaGa12O19:Cr3+ using a multi-site occupation
Xuesong Wang1, Yao Xiao1, Puxian Xiong2
1School of Materials Science and Engineering, Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou, 510640, China. qianqi@scut.edu.cn.
Abstract:
Near infrared mechanoluminescence (NIR-ML) materials have attracted the attention of researchers due to their unique advantages, such as high resistance to bright-field interference and higher penetration depth into biological tissues. However, the reported NIR-ML materials are mainly rare-ion-activated narrow-band emitters. In this work, we report a NIR-ML material of BaGa12O19:Cr3+ by a solid state reaction method. Broad NIR ML (650-1000 nm) is observed at lower force loads (12 N), which is based on the Cr3+ ion's multi-lattice site occupation. After heat treatment at 573 K for 20 min, BaGa12O19:Cr3+ still maintains 84.4% of its ML intensity. Furthermore, the ML intensity of BaGa12O19:Cr3+ is also significantly improved after UV pre-irradiation. Due to the defective piezoelectric photonic effect, BaGa12O19:Cr3+ has great self-recoverable properties even in the absence of UV and sunlight irradiation. Finally, the ML penetration rate of BaGa12O19:Cr3+ has reached as high as 66.97% in biological tissues, which suggests potential prospects for biostress detection towards bio-imaging applications.
