Optical wavelength conversion transparent film

A coated luminous material that absorbs ultraviolet light and emits red light

Overview

　Complexes composed of the rare earth element Eu (europium) and organic molecules are materials that absorb only ultraviolet light and emit red light with high brightness and color purity, and are being developed for use in displays, lighting, and sensors. Conventional rare earth complexes have low solubility and are prone to crystallization, making them difficult to fabricate transparent molded objects or use as films directly applied to plates, etc.
　The present invention realizes a transparent, coatable optical wavelength conversion film by mixing a clarifying agent that reduces crystallinity into the rare earth complex. Furthermore, because it absorbs only ultraviolet light and transmits visible light, it can be used in applications such as agricultural films to promote plant growth.

Features・Outstandings

Product Application

・Agricultural Film
・Security
・Smart Window
・Optical wavelength conversion film for lenses, etc.

Related Works

[1] Y. Kitagawa. et al., Scientific Reports, vol.12, 17155 (2022)
DOI：10.1038/s41598-022-21427-6

IP Data

IP No.　 ： JP7621652,US12291545, CN113727850
Inventor ： KITAGAWA Yuichi, SHIMA Kaori, WADA Satoshi, HASEGAWA Yasuchika, FUSHIMI Koji
keyword ： Phosphor, Rare earth complexes, Display, Agricultural film