​First in the World! OLED Screen That Both Emits Light and Generates Electricity Unveiled

Yes, the world's first OLED screen that both emits light and generates electricity in a single, integrated device has been unveiled. This technology was developed jointly by Japan's NHK Science & Technology Research Laboratories, Kyoto University, and Chiba University in January 2026. The related research has been published in the journal Nature Communications. Using novel MR-TADF materials, this technology achieves the dual functions of OLED for the first time------ light emission and solar power generation in a single device, marking a breakthrough in display technology.

Core Technological Breakthrough

Traditional Limitations: In the past, OLED light emission (requiring electricity) and solar power generation (converting light into electricity) were based on opposite principles, making their co-existence in a single element difficult. The research team successfully enabled a single device to switch between emission mode and power generation mode by utilizing MR-TADF (Multi-Resonance Thermally Activated Delayed Fluorescence) materials and precise energy control technology. The device functions as a normal display when powered, and in illuminated environments (e.g., outdoors), it can convert light energy into electricity for storage or direct use.

Key Performance Parameters

• Three-Primary-Color Emission: Red, green, and blue light emission has been achieved. Among these, the external quantum efficiency of the green and red light-emitting devices exceeds 8.5%.

• Narrow Spectrum Characteristic: MR-TADF materials can emit light with a narrow spectrum, specifically a Full Width at Half Maximum (FWHM) of less than 40nm, resulting in high color purity.

• Dual-Mode Switching: The same device can both emit light for display and absorb light for power generation.

• Breakthrough in Blue Emission: Blue light emission has long been a challenge in OLED technology. Its successful realization here is a landmark achievement.

Application Prospects

The core application scenarios for this technology are emergency displays and outdoor devices. For example, in environments lacking a stable power supply—such as disaster rescue sites, outdoor billboards, or wearable devices—the display screen can utilize ambient light to self-generate electricity and maintain its display, significantly enhancing device battery life. The research team stated that they will continue to improve both the light emission and power generation efficiencies in the future, with the goal of commercializing low-power-consumption display devices. The technology may also be expanded to areas with high demands for color accuracy, such as AR/VR.

Additional Note: It is important to distinguish that this "both emits light and generates electricity" technology refers to a single device possessing dual functions, not the traditional concept of a "solar-charged screen" (where the screen itself only displays and is paired with a separate solar panel). Currently, this technology is still in the laboratory stage, and further optimization of its efficiency and durability is required before mass production and application can become a reality.