Wang Jiming, Yuan Cuixia, Chen Shuming
Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, 518055, PR China.
Harbin Institute of Technology, Harbin, 150001, PR China.
Nat Commun. 2024 Apr 25;15(1):3512. doi: 10.1038/s41467-024-47891-4.
As an intrinsically direct current device, quantum-dot LED cannot be directly driven by household alternating current electricity. Thus, a driver circuit is required, which increases the complexity and cost. Here, by using a transparent and conductive indium-zinc-oxide as an intermediate electrode, we develop a tandem quantum-dot LED that can be operated at both negative and positive alternating current cycles with an external quantum efficiency of 20.09% and 21.15%, respectively. Furthermore, by connecting multiple tandem devices in series, the panel can be directly driven by household alternating current electricity without the need for complicated back-end circuits. Under 220 V/50 Hz driving, the red plug-and-play panel demonstrates a power efficiency of 15.70 lm W and a tunable brightness of up to 25,834 cd m. The developed plug-and-play quantum-dot LED panel could enable the production of cost-effective, compact, efficient, and stable solid-state light sources that can be directly powered by household alternating current electricity.
作为一种本质上的直流器件，量子点发光二极管无法直接由家用交流电驱动。因此，需要一个驱动电路，这增加了复杂性和成本。在此，通过使用透明导电铟锌氧化物作为中间电极，我们开发了一种串联量子点发光二极管，其在正负交流周期下均可运行，外部量子效率分别为20.09%和21.15%。此外，通过将多个串联器件串联连接，该面板可直接由家用交流电驱动，无需复杂的后端电路。在220 V/50 Hz驱动下，红色即插即用面板的功率效率为15.70 lm/W，可调亮度高达25,834 cd/m。所开发的即插即用量子点发光二极管面板能够生产出经济高效、紧凑、高效且稳定的固态光源，可直接由家用交流电供电。
