A COMPOSITION FOR FORMING A FILM HAVING A WRINKLE STRUCTURE AND A METHOD OF FORMING THE FILM

摘要

The present invention relates to a composition for producing a film having a wrinkle structure, and a method of producing a film having a wrinkle structure. More specifically, the composition of the present invention may comprise a photocuring agent and a photoinitiator dissolved in the photocuring agent, wherein the transmission cut-off wavelength of the photocuring agent is larger than the absorbance cut-off wavelength of the photoinitiator. Accordingly, the composition of the present invention can induce the formation of a photocured thin layer at the top of the composition at the beginning of a photocuring process. Thereafter, as the photocuring process continues, the photocured thin layer contracts and creates wrinkles on the photocured thin layer already formed above it, thereby forming a film having a wrinkle structure. The wrinkle structure of the film can be controlled by the relationship between the transmission cut-off wavelength of the photocuring agent and the absorbance cut-off wavelength of the photoinitiator constituting the composition, the photocuring rate of the composition, and the thickness of a layer composed of the composition prior to the photocuring process. Such films having a wrinkle structure can increase the luminous efficiency of LEDs and OLEDs through the light scattering effect and can increase the sensing efficiency of a sensor by increasing the surface area of the film.