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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/18800

Title: Photochromism and Long Persistent Luminescence in Pr^<3+>-Doped Garnet Transparent Ceramic via Ultraviolet or Blue Light Up-conversion Charging
Authors: Du, Qiping
Ueda, Jumpei
Zheng, Ruilin
Tanabe, Setsuhisa
Keywords: garnet transparent ceramic
persistent luminescence
Issue Date: 2023-01-19
Publisher: Wiley-VCH GmbH
Magazine name: Advanced Optical Materials
Volume: 11
Number: 7
Start page: 2202612
DOI: 10.1002/adom.202202612
Abstract: Multifunctional phosphors with photochromism and persistent luminescent (PersL) properties have attracted increasing interest owing to the capability of absorbing the photon energy and trapping the generated carriers via defects. However, the opacity of materials compromises the enhancement of photochromism and PersL properties; besides, the need of high energy excitation light source limits their applicability. To bridge these obstacles, we report Pr3+-doped Y3Al2Ga3O12 transparent ceramic with in-line transmittance over 80% at 1800 nm, which exhibits strong red PersL after several minutes ultraviolet (UV) light or blue light up-conversion charging. The luminance duration time can reach more than 7 h at 0.32 mcd /m2 threshold value after UV light charging. Interestingly, the phosphor also displays photochromic properties with robust fatigue resistance, i.e., the color changes from light green to red by UV/blue light illumination and is bleached at 300℃. The nature of trap centers, trapping and detrapping processes are explored based on thermoluminescence and electron spin resonance. Finally, the mechanism of photochromism and PersL are discussed by using vacuum referred binding energy diagram. This work opens new avenues for future research on multifunctional materials and brings potential applications in optical information encryption media and optical sensors.
Rights: This is the peer reviewed version of the following article: Qiping Du, Jumpei Ueda, Ruilin Zheng, and Setsuhisa Tanabe, Advanced Optical Materials, 11, 7, 2202612 (2023), which has been published in final form at https://doi.org/10.1002/adom.202202612. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wiley or by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked to Wiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof by third parties from platforms, services and websites other than Wiley Online Library must be prohibited.
URI: http://hdl.handle.net/10119/18800
Material Type: author
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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