A red-light-chargeable near infrared MgGeO3:Mn2+, Yb3+ persistent phosphor for bioimaging and optical information storage applications. Issue 24 (8th November 2021)

• Record Type: Journal Article
• Authors: Wang, Weili; Yan, Shao; Liang, Yanjie; Chen, Dongxun; Wang, Fang; Liu, Jingwei; Zhang, Yi; Sun, Kangning; Tang, Dongqi
• Is Part Of: Inorganic chemistry frontiers. Volume 8:Issue 24(2021)
• Page Start: 5149
• Page End: 5157
• Publication Date: 2021-11-08
• Subjects: Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d1qi01158h
• Languages: English
• ISSNs: 2052-1553

Abstract

Abstract : An NIR-emitting MgGeO3 :Mn 2+, Yb 3+ persistent phosphor chargeable with red light has been developed. The features of red-light charging and NIR persistent luminescence make this phosphor hold great potential for biomedical imaging and optical data storage. Abstract : Near-infrared (NIR) persistent phosphors have attracted extensive research interest owing to their distinct wavelength features and self-sustained luminescence properties. However, the high-energy ultraviolet light that is consistently used to charge these phosphors has compromised some promising applications, especially for biomedical imaging. Herein, we have successfully utilized long-wavelength 635 nm red-light to achieve intense NIR persistent luminescence in a MgGeO3 :Mn 2+, Yb 3+ phosphor. Seconds to minutes of 635 nm red-light charging can result in long-lasting NIR afterglow at around 680 nm for longer than 12 h. The photon trapping and detrapping processes in the MgGeO3 :Mn 2+, Yb 3+ phosphor were investigated in detail by varying the 635 nm red laser output power and the excitation duration, which indicate that a two-photon upconversion charging process is responsible for NIR persistent luminescence upon red-light illumination. The red-light-charging capability and self-sustained NIR luminescence properties make this material perfectly suited to applications across a wide number of fields, such as acting as ideal optical probes for deep-tissue bio-imaging and developing optical data storage technology for information security systems.