Shanghai Securities News China Securities Network News The official website of the Ministry of Science and Technology released foreign related research reports on February 21 that researchers at the University of Minnesota Twin Cities used a customized printer to completely 3D print a flexible organic light-emitting diode (OLED) display. The results were published in the journal Science Advances.
USING LAYERS OF ORGANIC MATERIALS TO CONVERT ELECTRICITY INTO LIGHT, OLED DISPLAY TECHNOLOGY CAN BE USED IN HIGH-QUALITY DIGITAL DISPLAYS, LARGE DEVICES SUCH AS TV SCREENS AND MONITORS, AS WELL AS HANDHELD ELECTRONIC DEVICES SUCH AS SMARTPHONES, AND IS POPULAR FOR ITS LIGHT WEIGHT, ENERGY SAVING, THINNESS, AND FLEXIBILITY, AND OFFERS WIDE VIEWING ANGLES AND HIGH CONTRAST RATIOS. The University of Minnesota research team had tried 3D printing OLED displays, but had difficulties in the uniformity of the luminous layer. In the new research project, they combined two different printing modes to print six device layers, enabling a fully 3D printed OLED display. Among them, the electrodes, interconnects, insulation and encapsulation are all extruded printed, while the active layer is sprayed and printed at room temperature using the same 3D printer. The display prototype is about 1.5 inches on each side and has 64 pixels. Each pixel works and displays light. Project leader Dr. Ruitao Su said that the device showed relatively stable emission in 2,000 bending cycle tests, which shows that fully 3D printed OLED can be used for soft electronics and wearable devices.
