Enhancing photoluminescence of carbon quantum dots doped PVA films with randomly dispersed silica microspheres.

ABSTRACT: As a kind of excellent photoluminescent material, carbon quantum dots have been extensively studied in many fields, including biomedical applications and optoelectronic devices. They have been dispersed in polymer matrices to form luminescent films which can be used in LEDs, displays, sensors, etc. Owing to the total internal reflection at the flat polymer/air interfaces, a significant portion of the emitted light are trapped and dissipated. In this paper, we fabricate free standing flexible PVA films with photoluminescent carbon quantum dots embedded in them. We disperse silica microspheres at the film surfaces to couple out the total internal reflection. The effects of sphere densities and diameters on the enhancement of photoluminescence are experimentally investigated with a homemade m

SUBMITTER: Zhao X 

PROVIDER: S-EPMC7109140 | biostudies-literature | 2020 Mar

REPOSITORIES: biostudies-literature