In-Planar-Electrodes Organic Light-Emitting Devices for Smart Lighting Applications

摘要

Smart lighting systems have earned an irreplaceable position in fields such as health care, communication, and garden cultivation. Inorganic light-emitting diode (LED) illuminant, as a traditional and well-developed field, is suitable for smart lighting systems and widely researched. However, smart lighting systems with organic light-emitting device (OLED) illuminant are rare. The key issue is to fabricate an efficient OLED illuminant with tunable spectra and intensity. Here, in-planar-electrodes OLEDs (IPE-OLEDs), which could be a possible solution to OLED illuminant used in smart lighting systems, is presented. By utilizing Mg:Ag thin film to connect two regular OLEDs with novel electron transporting layer, efficient and easy-to-fabricate IPE-OLEDs with high brightness and low voltage are achieved. The working mechanism of the IPE-OLEDs is discussed. The IPE-OLEDs can be easily driven with alternating current signals to independently address each emissive sub-cell. Thus, the OLED illuminant based on IPE-OLEDs enables adjustment of color temperature and intensity. To exhibit the features of the fabricated IPE-OLEDs further, a simple but effective smart lighting system containing IPE-OLEDs and gas detector is constructed, which could be used in the mining industry.