A strategy for developing near infrared long-persistent phosphors: taking MAlO3:Mn4+,Ge4+ (M = La, Gd) as an example

Yang Li; Yi-Yang Li; Kaniyarakkal Sharafudeen; Guo-Ping Dong; Shi-Feng Zhou; Zhi-Jun Ma; Ming-Ying Peng; Jian-Rong Qiu

doi:10.1039/C3TC32075H

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A strategy for developing near infrared long-persistent phosphors: taking MAlO₃:Mn⁴⁺,Ge⁴⁺ (M = La, Gd) as an example†

Yang Li,^a Yi-Yang Li,^a Kaniyarakkal Sharafudeen,^a Guo-Ping Dong,^a Shi-Feng Zhou,^a Zhi-Jun Ma,^a Ming-Ying Peng^a and Jian-Rong Qiu*^a

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* Corresponding authors

^a State Key Laboratory of Luminescent Materials and Devices, Institute of Optical Communication Materials, School of Materials Science and Technology, South China University of Technology, Guangzhou 510640, China
E-mail: qjr@scut.edu.cn

Abstract

A wide variety of activation ions have been used as near infrared (NIR) luminescent centres. However, when it comes to persistent luminescence, the numbers of known activators are relatively low. Here, we propose a holistic design concept for NIR long persistent phosphors, and successfully fabricate a series of novel Mn⁴⁺-doped MAlO₃ (M = La, Gd) persistent phosphors with the emission maximum around 730 nm. By drilling down into the details of defect types and trap depths, an improvement of persistent time over 20 h is realized by co-doping Ge⁴⁺/Mn⁴⁺. The obtained imaging of deep tissues reveals that the new luminescent indicators will open the possibility of advanced optical imaging, with high resolution and weak light disturbance, for factual assessment of the structural and functional processes in cells, tissue and other complex systems.

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Article information

DOI: https://doi.org/10.1039/C3TC32075H
Article type: Paper
Submitted: 19 Oct 2013
Accepted: 09 Dec 2013
First published: 12 Dec 2013

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J. Mater. Chem. C, 2014,2, 2019-2027

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A strategy for developing near infrared long-persistent phosphors: taking MAlO₃:Mn⁴⁺,Ge⁴⁺ (M = La, Gd) as an example

Y. Li, Y. Li, K. Sharafudeen, G. Dong, S. Zhou, Z. Ma, M. Peng and J. Qiu, J. Mater. Chem. C, 2014, 2, 2019 DOI: 10.1039/C3TC32075H

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Journal of Materials Chemistry C