Ferroelectric thin films present a powerful platform for next-generation computing and memory applications. However, domain morphology and dynamics in buried ferroelectric stacks have remained underex...

Lanthanide-doped nanoparticles (LnNPs) are promising for advanced photonic applications due to their unique optical properties. However, their practical implementation is hindered by surface quenching and weak absorption. Surface passivation through core–shell architectures is effective in mitigating quenching. However, it creates a fundamental trade-off by impeding molecular sensitization via energy transfer (ET) in the organic–inorganic hybrid systems. Here, we investigate this trade-off by fabricating core–shell LnNPs with precisely controlled shell thicknesses ranging from 0.8 to 3.0 nm. Surface passivation yields enhancements in 290-fold upconversion intensity and 25-fold downshifting intensity. Using 9-anthracenecarboxylic acid, we demonstrate that ET efficiency exhibits a nonmonotonic dependence on the shell thickness, with optimal performance achieved at a shell thickness of ∼0.8 nm. Through steady-state and time-resolved spectroscopic studies, we elucidate the complex ET dynamics. Our findings reveal the optimal shell thickness and answer whether no shell is the best in this nanohybrid system.

Single photon sources are fundamental for applications in quantum computing, secure communication, and sensing, as they enable the generation of individual photons and ensure strict control over photo...

Room-temperature circularly polarized single-photon sources are crucial for quantum information and photonic technologies. Here we integrated europium (Eu3+)-doped organic complexes with chiral plasmo...

Polymer nanocomposites, consisting of a polymer matrix and nanoparticles, are key materials in modern soft matter science. Because their macroscopic properties are closely linked to nanoscale dynamics...

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Optical properties of the lead halide perovskite nanocrystals are controlled by confined excitons and a rich spectrum of confined acoustic and optical phonons. We study experimentally and theoreticall...