Challenge to improve the brightness of persistent room temperature phosphorescence for high-resolution autofluorescence-free imaging

Shuzo Hirata

doi:10.1117/12.3017334

19 June 2024 Challenge to improve the brightness of persistent room temperature phosphorescence for high-resolution autofluorescence-free imaging

Shuzo Hirata

Author Affiliations +

Proceedings Volume PC13013, Organic Electronics and Photonics: Fundamentals and Devices IV; PC130130D (2024) https://doi.org/10.1117/12.3017334
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

The persistent emission that remains after excitation light irradiation is stopped enables high-contrast imaging without relying on surrounding autofluorescence. However, the luminance of common persistent emitting materials hardly increases even when the excitation light intensity increases. Therefore, persistent emission has not been utilized for high-resolution imaging. Here we introduce approaches to obtain high-resolution afterglow information using persistent room temperature phosphorescence (RTP). In order to obtain the high-resolution afterglow information, it is necessary to improve the RTP yield and suppress the saturation of RTP brightness under strong light excitation. We explain the molecular designs to enhance the RTP yield using unique dynamic quantum chemical calculations. For the suppression of the RTP brightness with excitation irradiance, Forster resonance energy transfer to the accumulated triplet excitons in strong excitation is discussed. Finally, afterglow emission from the individual nanoparticles of materials showing bright persistent RTP was demonstrated in an atmospheric and aqueous solution environment.

Conference Presentation

Citation Download Citation

Shuzo Hirata "Challenge to improve the brightness of persistent room temperature phosphorescence for high-resolution autofluorescence-free imaging", Proc. SPIE PC13013, Organic Electronics and Photonics: Fundamentals and Devices IV, PC130130D (19 June 2024); https://doi.org/10.1117/12.3017334

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KEYWORDS

Biological imaging

Autofluorescence

Phosphorescence

Quantum information

Atmospheric particles

Quantum efficiency

Quantum light

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