A team of researchers from ETH Zurich and Huazhong University of Science and Technology has developed a scalable fabrication technology that enables the deposition of extremely small OLED pixelspaving the way for displays with unprecedented pixel density. This technology, called “nano-OLED”, could revolutionize the world of electronic devices, offering images of surprising clarity and detail.
The developed technique is based on the creation of nano-openings on a silicon nitride film, through which OLED materials are deposited directly onto the substrate. This process allows for incredibly small pixels, in the order of 100 nanometers, the smallest ever made. The pixel density achieved is a whopping 84,000 PPI (pixels per inch), a value that far exceeds any current technology.
In addition to their small size, nano-OLEDs also feature an average external quantum efficiency (EQE) of up to 10%, which is promising for practical applications. The potential applications of this technology are numerous, ranging from mobile devices such as smartphones and tablets, to virtual and augmented reality headsets, to large-scale displays for digital signage and entertainment. The high pixel density of nano-OLEDs could lead to images with exaggerated clarity and detail, improving the user experience in various sectors.
However, despite the promising results, nano-OLED technology is still in its infancy and will require further research and refinement before it can be implemented on a large scale. Challenges such as large-scale production, long-term stability and energy efficiency will need to be addressed. However, the realization of such small OLED pixels represents a significant step towards the future of displays and this technology has the potential to revolutionize the way we interact with electronic devices.
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