High-resolution and large organic Electroluminescent (EL) displays could potentially be on the way thanks to Fujifilm Corporation and imec and their jointly-developed photoresist technology for ogranic semiconductors.
Photoresist technology enables submicron patterning, allowing Fujifilm and imec to successfully demonstrate full-color organic light-emitting diodes (OLED).
Since Organic EL displays are capable of being made thin and flexible, they are commonly used for smartphones, televisions, and wearable devices.
Not only are the displays durable, they also provide superior response time and contrast ratio.
Photoresist technology for organic semiconductors was jointly developed by Fujifilm and imec back in 2013, enabling submicron patterning without damaging the organic semiconductor materials, based on photolithography capable of high-resolution patterning on large substrates.
The technology has garnered a great deal of attention since its inception due to the fact an existing i-line exposure system can be used in association with the new technology.
As a result, no further money needs to be poured into the project and it has the potential to provide a cost-effective way of manufacturing high-resolution organic semiconductor devices.
The latest achievement from Fujifilm and imec shows promise for new opportunities, as they were able to produce full-color OLEDs with the photoresist technology for organic semiconductors and successfully verified their performance.
Officially from Fujifilm:
Red, green and blue organic EL materials were patterned, each in the subpixel pitch of 20μm*6, to create full-color OLEDs. An OLED array of 40 x 40 dots at the resolution of 640ppi was realized and illuminated with UV rays to confirm that red, green and blue dots separately emitted light. The emission of red, green and blue lights was also confirmed in a test involving the application of voltage rather than illumination, confirming its correct performance.