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

摘要

A composition for forming film having wrinkle structure and a method of forming the film are disclosed. The composition includes photo-curable agent and photoinitiator dissolved in the photo-curable agent. The cut off wavelength of light transmittance of the photo-curable agent is greater than the cut off wavelength of light absorbance of the photoinitiator. Photo-cured thin film is formed at the upper portion of composition layer at an initial time period of irradiation. By subsequent contraction, the photo-cured thin film forms wrinkles. The wrinkle structure is controlled by the relation of the cut off wavelength of light transmittance of the photo-curable agent and the cut off wavelength of light absorbance of the photoinitiator, the photo-curing rate of the composition and the thickness of the composition layer, and the photoinitiator concentration, etc., before photo-curing. The film may increase the emission efficiency of LED and OLED and the sensing effect of sensor.

主权项

1. A composition for forming a film having a wrinkle structure, comprising:
a first photo-curable agent and a first photoinitiator dissolved in the first photo-curable agent, a first cut off wavelength of light transmittance of the first photo-curable agent being greater than a first cut off wavelength of light absorbance of the first photoinitiator, the first cut off wavelength of light transmittance being the longest light wavelength of wavelengths having less than or equal to about 1.0% of light transmittance when light is irradiated to the first photo-curable agent layer with a thickness of about 1 mm, and the first cut off wavelength of light absorbance being the shortest light wavelength of wavelengths having less than or equal to about 0.05 of light absorbance when light is irradiated to a diluted solution layer, about 10 mm in thickness, of the first photoinitiator with about 1.0×10−4 mol %.