Understanding and tuning blue-to-near-infrared photon cutting by the Tm³⁺/Yb³⁺ couple.

ABSTRACT: Lanthanide-based photon-cutting phosphors absorb high-energy photons and 'cut' them into multiple smaller excitation quanta. These quanta are subsequently emitted, resulting in photon-conversion efficiencies exceeding unity. The photon-cutting process relies on energy transfer between optically active lanthanide ions doped in the phosphor. However, it is not always easy to determine, let alone predict, which energy-transfer mechanisms are operative in a particular phosphor. This makes the identification and design of new promising photon-cutting phosphors difficult. Here we unravel the possibility of using the Tm³⁺/Yb³⁺ lanthanide couple for photon cutting. We compare the performance of this couple in four different host materials. Cooperative energy transfer from Tm<

SUBMITTER: Yu D 

PROVIDER: S-EPMC7305182 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature