Visionox Implements 4th-Generation OLED Technology Using pTSF Mechanism

Visionox announced at SID 2025 International Display Week that it has successfully demonstrated the commercialization potential of pTSF (Phosphor-assisted Thermally Activated Delayed Fluorescence Sensitized Fluorescence), a fourth-generation OLED technology. This technology is part of hyperfluorescence OLED technology, the fourth generation of OLED technology, and has been attracting attention as a key technology for the next-generation OLED display industry, as it simultaneously satisfies high color reproduction, high efficiency, and long life.

The research team developed green OLED devices with an ultra-wide color gamut that not only exceeds the DCI-P3 standard but also meets the requirements of AdobeRGB and BT.2020. In particular, the newly developed pTSF-based hyperfluorescence OLED device achieved high color purity with CIEx < 0.21 and FWHM (wavelength width) of 21-27 nm and reported up to 12% efficiency improvement and 20% lifetime improvement compared to existing commercial phosphorescence OLEDs.

The pTSF mechanism combines the excellent color purity of fluorescent emitters, the 100% exciton utilization of TADF hosts, and efficient energy transfer from phosphorescent assistant dopants, resulting in a more precise and stable emission system compared to traditional OLED structures. In addition, by optimizing the material deposition process for the G6 mass production line, material usage was reduced by over 10% without compromising quality.

Two prototype products—Product A and Product B—utilizing the pTSF technology were also developed. Compared to existing Visionox OLED products, Product A and B showed 12% and 6% lower power consumption, respectively, while achieving over 99.5% coverage of both DCI-P3 and AdobeRGB color gamuts. Furthermore, both maintained comparable reliability in high temperature and high humidity endurance tests.

A Visionox representative stated, “This milestone marks a pivotal step toward the commercialization of hyperfluorescence OLEDs. Starting with green, we aim to expand pTSF architecture to red and blue devices as well, ultimately achieving full BT.2020 color gamut coverage in next-generation OLED displays.”

The research was presented with sample demonstrations at SID 2025, and was conducted in collaboration with the Department of Chemistry at Tsinghua University, supported by China’s National Key R&D Program.

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