Flexible transparent displays based on core/shell upconversion nanophosphor-incorporated polymer waveguides.

ABSTRACT: Core/shell (C/S)-structured upconversion nanophosphor (UCNP)-incorporated polymer waveguide-based flexible transparent displays are demonstrated. Bright green- and blue-emitting Li(Gd,Y)F₄:Yb,Er and Li(Gd,Y)F₄:Yb,Tm UCNPs are synthesized via solution chemical route. Their upconversion luminescence (UCL) intensities are enhanced by the formation of C/S structure with LiYF₄ shell. The Li(Gd,Y)F₄:Yb,Er/LiYF₄ and Li(Gd,Y)F₄:Yb,Tm/LiYF₄ C/S UCNPs exhibit 3.3 and 2.0 times higher UCL intensities than core counterparts, respectively. In addition, NaGdF₄:Yb,Tm/NaGdF₄:Eu C/S UCNPs are synthesized and they show red emission via energy transfer and migration of Yb³⁺ → Tm³⁺ → Gd

SUBMITTER: Park BJ 

PROVIDER: S-EPMC5377360 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature