TADF: TRANSFORMING OLED DISPLAYS

Our highly efficient OLED materials are based on the TADF (thermally activated delayed fluorescence) technology, enabling highest OLED performance: TADF combines the advantages of phosphorescence (high efficiency) and fluorescence (lifetime). CYNORA’s materials are designed to withstand the electrical stress within the OLED and are thus ideally suited for stable and efficient blue emitters. By using them in an OLED device, the power consumption of the OLED display can be significantly reduced. The TADF technology can be used efficiently for all OLED colors red, green and blue, which has not been accomplished so far by any other technology.

TADF for OLED displays. Learn more

Advantages of TADF

Compatible with the current production processes

Higher display resolution

Reduced power consumption and longer battery operation

Metal-free materials

Patent protected materials

2x longer battery operation in portable displays  (TADF blue)

The TADF technology covers different approaches

In general, the TADF technology can be used in two different approaches: either the TADF material acts as emitter in the Self-emitting (also called the classical) TADF approach, or together with a co-emitter in the Co-emitting (also called Hyper) approach.

The classical approach has the advantage that it is rather simple since it includes only two materials in the emissive layer: a host material and the TADF emitter.

The co-emitting approach can be used, when a high color purity in the OLED display is crucial. In this system, instead of emitting from the TADF material, the energy is transferred to the co-emitter, which finally emits the light of the OLED device. In both cases, the TADF material is the key to high-efficiency as it is determining the efficiency, while co-emitter is giving the right color. The co-emitter can be chosen in such a way that it delivers the spectral requirements of the pixel. For example, fluorescent emitters can be used, which deliver a narrow spectrum resulting in a high color purity. The co-emitting TADF OLED is clearly superior to the classical fluorescent OLED, since the TADF emitter guarantees for a much higher efficiency of the device, while color purity is maintained by the fluorescent emitter.

Why efficient blue emitters?

Due to the lower efficiency of the widely used blue fluorescent emitters, today´s blue OLED pixels consume much more power than the red and green ones. Using CYNORA´s high efficiency blue emitters, the power consumption will be significantly decreased, leading to a considerably longer battery life for the consumer.

In order to gain sufficient brightness in the OLED displays, using inefficient fluorescent emitters, relatively large blue pixel areas are required. In a smartphone, which contains red, green, and blue pixels, the blue pixel makes up to ~50% of the total area. By the use of our far more efficient blue emitters, OLED panel makers could significantly reduce the size of the blue pixels. The direct result is a higher display resolution.

Therefore, high efficiency in blue OLED emitters enable a significant reduction of the overall display power consumption and higher display resolution. A highly efficient blue is the most requested material by OLED display makers.

Why a deep green color point?

CYNORA’s TADF Deep Green emitter systems will enable a much higher color purity of the green pixel when compared to state-of-the-art phosphorescent-based green emitters. This will allow a color gamut beyond DCI-P3 to be achieved, as well as broad coverage of the BT.2020 color space. The innovation will bring the OLED industry closer to reaching the new display standards for ultra-high-definition televisions (UHDTVs).