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

0558985 - FZÚ 2023 RIV GB eng J - Journal Article
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
EU Projects: European Commission(XE) 101003405 - HANSOME
Institutional support: RVO:68378271
Keywords : molecular self-assembly * optical materials and structures * organic–inorganic nanostructures
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 16.6, year: 2022
Method of publishing: 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.
Permanent Link: https://hdl.handle.net/11104/0332503

Scientific data in ASEP :
Highly luminescent scintillating hetero-ligand MOF nanocrystals with engineered Stokes shift for photonic applications