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National Chaio University Uses Semi-Polar Wafer Technology To Produce Micro LED Chips With Stabilized Emission Wavelength for uLEDs
April 26, 2020
Dr. Kuo Hao-Chung at Taiwan’s National Chiao Tung University in collaboration with Saphlux from the U.S., and researchers at Yale University and Xiamen University have achieved the production of full color Micro LED display with high color stability using semi polar InGaN LED and quantum dot photoresist. Their results will be published soon on Photonics Research. Dr. Kuo addressed that the team continues to focus on color conversion based on quantum dot technology which requires only blue or UV LEDs as a light source and quantum dots in different color to achieve full color display. The method not only simplifies the mass transfer process but also deliver good performance in color rendering.
Figure 1: RGB Pixel Assembly Form C-Plane Of uLEDs And QDPR
April 26, 2020
Dr. Kuo Hao-Chung at Taiwan’s National Chiao Tung University in collaboration with Saphlux from the U.S., and researchers at Yale University and Xiamen University have achieved the production of full color Micro LED display with high color stability using semi polar InGaN LED and quantum dot photoresist. Their results will be published soon on Photonics Research. Dr. Kuo addressed that the team continues to focus on color conversion based on quantum dot technology which requires only blue or UV LEDs as a light source and quantum dots in different color to achieve full color display. The method not only simplifies the mass transfer process but also deliver good performance in color rendering.
Figure 1: RGB Pixel Assembly Form C-Plane Of uLEDs And QDPR
Source: Chen et al. 2020
Blue and green colored LED chips usually change color as the operating current alters. As the brightness of display is to comply with the environment, the colors presented by the display may shift. The team used semi-polar wafer technology to produce Micro LED chips with stabilized emission wavelength and tackled the issue of wavelength shift and color shift. In the research, quantum dot photoresist was adopted to manufacture color pixels. The approach can largely reduce the difficulty of mass transfer process as it does not need to transfer RGB chips separately. The team developed a full color Micro LED array with high color stability which can be applied to patterning large-area device.