Ultra-wideband-responsive photon conversion through co-sensitization in lanthanide nanocrystals.

ABSTRACT: Distinctive upconversion or downshifting of lanthanide nanocrystals holds promise for biomedical and photonic applications. However, either process requires high-energy lasers at discrete wavelengths for excitation. Here we demonstrate that co-sensitization can break this limitation with ultrawide excitation bands. We achieve co-sensitization by employing Nd³⁺ and Ho³⁺ as the co-sensitizers with complementary absorptions from the ultraviolet to infrared region. Symmetric penta-layer core-shell nanostructure enables tunable fluorescence in the visible and the second near-infrared window when incorporating different activators (Er³⁺, Ho³⁺, Pr³⁺, and Tm³⁺). Transient spectra confirm the directional energy transfer from sensitiz

SUBMITTER: Jiang Z 

PROVIDER: S-EPMC9929054 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature