南工大突破钙钛矿LED效率瓶颈 外量子效率达45.5%

Core Insights - The research team from Nanjing University of Technology has made significant advancements in the field of perovskite light-emitting diodes (LEDs), achieving a world record external quantum efficiency of 45.5% for stacked perovskite LED devices [1][2] - The study highlights the growing demand for high-quality, low-cost, and flexible display and lighting products, positioning perovskite materials as a global research focus due to their advantages over traditional semiconductor materials [1] Group 1 - The team has developed a unique TCTA/MoOx/HATCN/SnO2 interlayer structure that facilitates efficient charge injection while protecting the underlying perovskite light-emitting layer, addressing structural damage issues during the stacking process [2] - The introduction of an interlayer photon recycling strategy allows for effective absorption and re-emission of photons between stacked layers, significantly enhancing light extraction efficiency [2] - The new device maintains a high efficiency of 34.5% at a current density of 100 mA/cm², demonstrating superior performance compared to single-junction devices and traditional stacked organic LEDs [2] Group 2 - Stacked perovskite LEDs exhibit unique advantages such as low operating voltage, high brightness, and high color purity, marking a crucial step towards commercialization [2] - The advancements in perovskite LED technology indicate a potential shift in the lighting and display industry, as these devices approach the efficiency levels of commercial organic LEDs while offering additional benefits [1][2]