Highly luminescent scintillating hetero-ligand MOF nanocrystals with engineered Stokes shift for photonic applications

0558985 - FZÚ 2023 RIV GB eng J - Článek v odborném periodiku
Perego, J. - Bezuidenhout, C.X. - Villa, Irene - Cova, F. - Crapanzano, R. - Frank, I. - Pagano, F. - Kratochwill, N. - Auffray, E. - Bracco, S. - Vedda, A. - Dujardin, C. - Sozzani, P. E. - Meinardi, F. - Comotti, A. - Monguzzi, A.
Highly luminescent scintillating hetero-ligand MOF nanocrystals with engineered Stokes shift for photonic applications.
Nature Communications. Roč. 13, č. 1 (2022), č. článku 3504. E-ISSN 2041-1723
GRANT EU: European Commission(XE) 101003405 - HANSOME
Institucionální podpora: RVO:68378271
Klíčová slova: molecular self-assembly * optical materials and structures * organic–inorganic nanostructures
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 16.6, rok: 2022
Způsob publikování: Open access

We obtain high efficiency luminescence with significant Stokes shift by exploiting fluorescent conjugated acene building blocks arranged in nanocrystals. Two ligands of equal molecular length and connectivity, yet complementary electronic properties, are co-assembled by zirconium oxy-hydroxy clusters, generating crystalline hetero-ligand metal-organic framework (MOF) nanocrystals. The diffusion of singlet excitons within the MOF and the matching of ligands absorption and emission properties enables an ultrafast activation of the low energy emission in the 100 ps time scale. The hybrid nanocrystals show a fluorescence quantum efficiency of ~60% and a Stokes shift as large as 750 meV (~6000 cm−1), which suppresses the emission reabsorption also in bulk devices. The fabricated prototypal nanocomposite fast scintillator shows benchmark performances which compete with those of some inorganic and organic commercial systems.
Trvalý link: https://hdl.handle.net/11104/0332503

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Highly luminescent scintillating hetero-ligand MOF nanocrystals with engineered Stokes shift for photonic applications