Poelman, Dirk

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Ghent University Academic Bibliography

(Workshop topic - choose from list) (do not use this space)Persistent luminescent materials for medical imagingDirk Poelman11Ghent University, BelgiumPersistent luminescent materials or glow-in-the-dark compounds have been known for centuries [1], but due to theirlimited performance in terms of total light output, they were never used for large scale applications. It is only since1996 [2], when SrAl2O4:Eu,Dy was introduced as a new persistent phosphor, that a leap forward in both brightness anddecay time was achieved. This paper has initiated substantial research, which has led to an entire family of materials,showing an appreciable afterglow for more than 24 hours [3,4].These developments have opened up a whole new series of applications, ranging from emergency illumination, dec-oration and toys to medical imaging. For the latter application, materials are needed with deep red to near infraredemission, which falls in the transparency window of biological tissues. This, together with the need for red emittersfor indicating emergency situations, has led to an interest in long wavelength persistent luminescence.For most dopants which can be used for efficient energy storage and persistent luminescence, the dominant emissionwavelength is strongly dependent on the local surroundings of the dopant ions in the polycrystalline host compound.Eu2+ is by far the most common dopant for both photoluminescence (for example for wavelength conversion forwhite LEDs) and for persistent luminescence [3]. However, there are only very few hosts known, notably a number ofternary and quaternary nitrides, that allow to shift the Eu2+ emission to the deep red. This presentation will discussthese possible hosts for long-wavelength emission from Eu2+, and give an overview of alternative dopants which havebeen successfully used for (infra)red emission.In addition, the potential of persistent luminescent materials for a number of other applications, such as mechanolu-minescence and energy storage for 24h solar cells, will be discussed.Submitting author: D. R., Poelman, Ghent University, Faculty of Sciences, Department of Solid State Sciences,LumiLab research group, Krijgslaan 281/S1, B-9000 Gent, BELGIUM, Tel: +32-9-264-4367;E-mail: dirk.poelman “at” ugent.beReferences[1] M. Lastusaari, T. Laamanen, M. Malkamki, K.O. Eskola, A. Kotlov, S. Carlson, E. Welter, H.F. Brito, M. Bet-tinelli, H. Jungner and J. Hls, Eur. J. Mineral., 24, 885890 (2012).[2] T. Matsuzawa, Y. Aoki, N. Takeuchi and Y.A. Murayama, J. Electrochem. Soc., 143, 26702673 (1996).[3] K. Van den Eeckhout, P.F. Smet and D. Poelman, Materials, 3, 2536-2566 (2010).[4] K. Van den Eeckhout, D. Poelman and P.F. Smet, Materials, 6, 2789-2818 (2013).

Persistent luminescent materials for medical imaging

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Persistent luminescent materials for medical imaging

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Ghent University Academic Bibliography