In recent years, LED has been widely recognized in lighting and display fields due to its characteristics of energy saving, environmental protection, safety, low power consumption and high brightness. Different from the common inorganic LEDs on the market, organic light-emitting diodes (OLEDs), which have emerged in the field of small-size displays in recent years, are not limited by the manufacturing process and can produce large-size flexible devices. They have irreplaceable advantages and have been initially used in mobile phones, TVs and other electronic products, such as the curved screen mobile phones that many people are already using in daily life. At present, the efficiency, stability and manufacturing cost of OLED devices need to be further improved. This is an important step for OLED to expand its application scope.the main limiting factor.
Organic-inorganic hybrid perovskite materials have the advantages of both organic and inorganic semiconductor materials. In response to the problems of low luminous efficiency of two-dimensional perovskite materials and poor film formation and stability of three-dimensional perovskite materials, Academician Huang Wei's team creatively used solution processing methods to introduce the quantum well structure used in inorganic LEDs to improve the luminous efficiency of the device into perovskite LEDs, and developed a perovskite luminescent material with a multi-quantum well structure, which combines the advantages of high film-forming quality of two-dimensional perovskite materials and high luminous efficiency of three-dimensional perovskite materials. Using this dimensionally tunable multi-quantum well perovskite material, we have set the current world record for perovskite LED energy conversion efficiency.
According to reports, this work has opened up a new research direction for perovskite materials and their research in the field of luminescence, and is expected to achieve industrialization in the future based on further in-depth research.
ANNA