Minnesota Researchers develop First Fully 3D Printed OLED Display

3 Mins read
3D Printed OLED Display
Above: The fully 3D printed flexible organic light-emitting diode (OLED) display prototype is about 1.5 inches on each side and has 64 pixels/Image Source: McAlpine Group, University of Minnesota

Researchers at the University of Minnesota Twin Cities used a customized printer to create a fully 3D printed OLED display in a ground-breaking new study. The discovery could lead to low-cost a flexible organic light-emitting diode (OLED) display that can be mass-produced at home using 3D printers rather than by technicians in expensive microfabrication facilities in the future.

Science Advances, a peer-reviewed scientific journal published by the American Association for the Advancement of Science, published the findings (AAAS).

The technology behind OLED displays is based on the conversion of electricity into light via an organic material layer. OLEDs are high-quality digital displays that can be made flexible and used in both large-scale devices like television screens and monitors and handheld electronics like smartphones. OLED displays have grown in popularity due to their light weight, low power consumption, thin and flexible design, and wide viewing angle and high contrast ratio.

“OLED displays are usually produced in big, expensive, ultra-clean fabrication facilities. We wanted to see if we could basically condense all of that down and print an OLED display on our table-top 3D printer, which was custom built and costs about the same as a Tesla Model S.”

3D Printed OLED Displays

Above: 3D printing of OLED displays in action/Video Source: University of Minnesota Twin Cities

The team had previously attempted to created 3D printed OLED displays, but they were frustrated by the uniformity of the light-emitting layers. Other groups used spin-coating or thermal evaporation to deposit certain components and create functional devices in addition to partially printing displays.

The University of Minnesota research team combined two different modes of printing in this new study to print the six device layers, resulting in a fully 3D printed OLED display. The electrodes, interconnects, insulation, and encapsulation were all extrusion printed, while the active layers were spray printed at room temperature on the same 3D printer. The display prototype had 64 pixels on each side and measured about 1.5 inches on each side. Every pixel was functional and displayed light.

“I thought I would get something, but maybe not a fully working display. But then it turns out all the pixels were working, and I can display the text I designed. My first reaction was ‘It is real!’ I was not able to sleep, the whole night.”

– Ruitao Su, the first author of the study

Su said the 3D-printed display was also flexible and could be packaged in an encapsulating material, which could make it useful for a wide variety of applications.

“The device exhibited a relatively stable emission over the 2,000 bending cycles, suggesting that fully 3D printed OLEDs can potentially be used for important applications in soft electronics and wearable devices,” Su said.

The next step, according to the researchers, is to 3D print OLED displays with higher resolution and improved brightness.

McAlpine added, “The nice part about our research is that the manufacturing is all built in, so we’re not talking 20 years out with some ‘pie in the sky’ vision. This is something that we actually manufactured in the lab, and it is not hard to imagine that you could translate this to printing all kinds of displays ourselves at home or on the go within just a few years, on a small portable printer.”

In addition to McAlpine and Su, the research team included Xia Ouyang, a postdoctoral researcher at the University of Minnesota, Sung Hyun Park, who is now a senior researcher at the Korea Institute of Industrial Technology, and Song Ih Ahn, an assistant professor of mechanical engineering at Pusan National University in Korea.

The research was primarily supported by the National Institutes of Health’s National Institute of Biomedical Imaging and Bioengineering (Award No. 1DP2EB020537), with additional funding provided by The Boeing Company and the Minnesota Discovery, Research, and InnoVation Economy (MnDRIVE) Initiative through the State of Minnesota. Parts of this research were carried out at the Minnesota Nano Center, which is funded by the National Science Foundation via the National Nano Coordinated Infrastructure Network (NNCI).

The research paper titled “3D printed flexible organic light-emitting diode displays,” has been published in Science Advances.

About Manufactur3D Magazine: Manufactur3D is an online magazine on 3D Printing. Visit our Global News page for more updates on Global 3D Printing News. To stay up-to-date about the latest happenings in the 3D printing world, like us on Facebook or follow us on LinkedIn and Twitter.

1999 posts

About author
Manufactur3D is an Indian Online 3D Printing Media Platform that reports on the latest news, insights and analysis from the Indian and the Global 3D Printing Industry.
Related posts

AMGTA's new Research shows the Environmental Benefits of Material Jetting in Fashion Footwear

2 Mins read
The AMGTA has released the findings of a life-cycle inventory (LCI) study on the environmental benefits of 3D material jetting in fashion footwear.

New York bill proposes a Criminal background check to buy a 3D Printer

3 Mins read
A new bill in the New York Senate proposes a criminal background check to buy a 3D printer. Step taken to curb 3D Printed guns or ghost guns

New Process for 3D Printing Glass Microstructures at Low Temperature with Fast Curing

3 Mins read
Georgia Tech researchers has developed a new method for 3D printing glass lenses and other structures that could be used in medical devices and