In-situ fabrication of a novel anisotropic PC-matrix light-scattering materials containing spindle-shaped core-shell particles

Abstract

Polycarbonate (PC)/Poly(styrene-co-acrylonitrile) (SAN)-organic silica bead (OSB) anisotropic light-scattering materials containing novel spindle-shaped core-shell particles through simple, low-cost hot stretching methods are prepared in situ , which have excellent and easily tunable optical properties. The effects of OSB particle size, OSB mass fraction and stretching ratio on the morphology of the spindle-shaped core-shell particles and the scattering properties of PC/SAN-OSB composites were studied in detail. The results show that smaller particle size OSB and smaller draw ratio are more conducive to the production of spindle-shaped core-shell particles. And because of the multiple scattering effects of the spindle-shaped core-shell particles, they have a significant compensation effect on the pattern short-axis light-scattering range of the PC anisotropic materials while ensuring that the pattern long-axis direction light-scattering range is not impaired.

Effective Optical Diffuser Based on Interfacial Hydrogen-Bonding Polymer Complexation

“…Transmittance (T) and haze (H) are basic parameters used to describe the performance of optical diffusers. 12 The third parameter, diffusion efficiency (E), is introduced for the better discussion of the performance of the optical diffuser. Figure 1 gives the definitions of T, H, and E. T is the intensity ratio of the total light propagating through the optical diffuser to light source.…”

“…Transmittance ( T ) and haze ( H ) are basic parameters used to describe the performance of optical diffusers . The third parameter, diffusion efficiency ( E ), is introduced for the better discussion of the performance of the optical diffuser.…”

“…I 3 is the intensity of atmosphere scattering, which is a very small value. I 4 is the scattering intensity (+2.5° to +90° and −2.5 to −90°) of the diffuser …”

“…Optical diffuser is used to scatter/diffuse the light for various optoelectronic applications, such as liquid crystal display, light-emitting diodes, solar cells, and photodetectors. − An optical diffuser realizes photo management through positive utilization of light scattering. Microspheres (solid, core–shell or hollow), − nanofibers (cellulose nanofiber, cellulose nanocrystal, or devirite), , microvoids, wrinkles, micropyramids, and microlenses − have been introduced on the surface or in the bulk matrix as scattering units to produce effective optical diffusion.…”

Toward Perfect Optical Diffusers: Dielectric Huygens’ Metasurfaces with Critical Positional Disorder

“…The need for efficient and ultrathin optical diffusers becomes particularly more pressing with the continuous replacement of conventional light bulbs by flat light sources. Conventional optical diffusers are bulky [8,24,[40][41][42][43] and lack the capability to be integrated into flat photonic devices. [44][45][46] Metasurfaces, consisting of designed optical nanoparticles arranged in a planar fashion, can overcome this limitation and enable optical devices with a subwavelength thickness.…”