Organic Light Emitting Diode Based On Flexible Color Conversion Substrate

Organic Light Emitting Diode(OLED)has many advantages such as light and thin,wide color gamut,good image quality,fast response speed,low reach,wide viewing angle,and flexibility.It has breakthrough application potential in many electronic device fields.Research in the field of lighting sources has attracted widespread attention.White Organic Emitting Diode(WOLED)has shown potential in the fields of flat panel display technology,full-color display and lighting applications due to its high brightness,high efficiency,low loss,large area,and surface emission characteristics.In terms of application prospects,a variety of methods for preparing WOLEDs have been reported,which are different from the above complicated manufacturing processes and poor color stability.Another method for preparing WOLEDs is to combine blue OLED with a color conversion layer(Color conversion layer,CCL).The CCL is rotated to the opposite side of the blue OLED to absorb some blue light and convert it down to red light,and then the red light and unconverted blue light are combined into white light.This down-conversion scheme is based on its simple manufacturing process and has a great potential in the field of lighting.Moreover,the optical characteristics of the device can be easily tuned without significantly changing its electrical properties.With CCL-based OLEDs,chromaticity-stable light sources have been implemented,and RGB full-color displays have been achieved.This article selects FIrpic as the blue emitter in the blue OLED unit,and connects Y3Al5O12:Ce3+ as CCL for spin coating.The UV-curable photopolymer NOA63 utilizes a flexible substrate.The new CCL shows that it has a height comparable to that of the conventional CCL.The fabrication process of the entire device structure is very simple,which greatly reduces the fabrication cost.