P‐167: UV Light Influence to OLED Filler Encapsulation

Organic light‐emitting diodes (OLEDs) have been regarded as one of the most promising technologies for future displays, and efficient encapsidation technology is the key to improve lifetime of OLED devices. Herein, we explore the injitience of different Ultraviolet (UV) lamps (High pressure mercury UV lamp (hereinafter abbreviated as mercury UV lamp) and Light Emitting Diode (LED) UV lamp) on OLED encapsulation filler curing efficiency and probe into the inherent causes. The results show that mercury UV lamp presents a higher filler curing efficiency than LED UV lamp, attributing to its wider light spectrum. Unfortunately, the short wavelength below 325 nm in mercury UV lamp light can cause fast deterioration for filler film. Obviously, this discovery has important guiding effect in optimized design of encapsulation process.