Efficient Visible Light Charging for Rare Earth-Free Persistent Phosphor

作者：Yang, Huanxin; Zhao, Weiren^*; Song, Enhai; Hu, Kaige; Zhang, Hongshi; Yun, Rui; Huang, Hao; Zhong, Jiyou; Li, Yang^*; Li, Xiyan^*

来源：Advanced Optical Materials, 2022, 10(9): 2102496.

DOI：10.1002/adom.202102496

• afterglow color shift
• broadband emission
• Mn
• (2+)
• orange afterglow
• visible light storage

Persistent phosphor, as an eco-friendly energy storage material, usually needs high-energy photonic rays in the storage process, such as ultraviolet (UV) light, X-ray, or even gamma-ray. This strict requirement for light source which is harmful to human health greatly limits the popularity of persistent phosphors in the daily life. Here, a novel broadband orange persistent emissive phosphor LiGaO2:1%Mn2+ (LGOM) is reported which supports efficient wide band excitation from UV to green light. The afterglow excited by 470 nm light even reaches approximate to 80% as intensity as UV excitation. The afterglow of LGOM excited by common blue lamp (450-460 nm) can be pictured by the smart phones for more than 48 h. The mechanism of visible light storage is discussed through the thermal-luminescence measurements. In addition, interestingly, its persistent emissive color can shift from orange-yellow to orange-red after ceasing the excitation source. This unique broadband orange afterglow phosphor which supports efficient wide range visible-light excitation, afterglow color shift, and long-lasting luminescence is expected to have potential applications in the fields of emergency direction, anticounterfeiting, decoration design, etc.

• 单位
  南开大学; y; 广东工业大学; 广州医学院