P‐8.4: A Novel Non‐barrier‐film Quantum Dot Diffusion Plate in Backlight System

Abstract

Compared with traditional LED backlight source, the quantum dot‐based backlight module has recently attracted extensive interest owing to their wider color gamut. Generally, quantum dots are sensitive to the external environment, and quantum dots in current commercial quantum dot film are usually protected by two barrier film layers to isolate the influence of external factors such as water and oxygen. In this report, a new quantum dot plate strategy was developed by a three‐layer co‐extrusion method without the use of any expensive barrier film. Quantum dots were homogeneous embedded in the polymeric matrix of the middle layer, and the upper and lower layer act as protective layers to avoid the destruction of external environment to quantum dots. Reliability tests demonstrate that this non‐barrier‐film quantum dot plate shows satisfactory stability comparable to the high‐barrier‐material‐based quantum dot films under conditions of blue‐LED irradiation, high temperature and high humidity.