Color-tunable organic light-emitting devices and their applications

Organic light-emitting devices (OLEDs), as a luminescent technology with flexible, flat light, have become a mainstream display technology for mobile equipment. Notably, color-tunable OLEDs are capable of dynamically changing the emission wavelength or color of light modulated by voltage, and they exhibit distinctive behavior compared with that in conventional OLEDs. These intriguing features have also sparked many application fields, such as smart lighting and information encryption. Here, we offer an overview of the structure and mechanism in color-tunable OLEDs, and we discuss performance parameters of devices and their prospects in smart lighting, plant growth lamps, anticounterfeiting, and visual interaction.