Source: Global Semiconductor Watch Collation

According to China Optics Valley news, Zhang Jianbing from Hubei Optics Valley Laboratory, the School of Integrated Circuits of Huazhong University of Science and Technology, and the Optoelectronic Devices and 3D Integration Team recently collaborated with Guangna Jiayyuan (Guangzhou) Technology Co., LTD., to develop a high-performance quantum dot photoresist (QD-PR) with blue light conversion efficiency of 44.6% (green) and 45.0% (red). The lithography accuracy reaches 1um, and the performance indicators are the industry leading level.

China Optics Valley news said that in 2023 colloidal quantum dots won the Nobel Prize, because of the wide and narrow luminous half peak, adjustable color, high efficiency, small particle size and other excellent performance, is an ideal choice for fluorescent materials with blue micro-LED. The quantum dot color conversion layer needs to be pixelated to cooperate with the blue micro-LED array, and there are two main schemes to achieve quantum dot pixelation: inkjet printing and lithography. In contrast, the lithography accuracy is higher and the obtained quantum dot pixels are smaller, which is more suitable for AR and VR applications with high PPI.

It is understood that based on high-performance quantum dot photoresist, the research team achieved high-precision quantum dot pixels. In addition, these quantum dot color conversion pixels also showed excellent stability, retaining 92.5% (red) and 93.4% (green) of the original luminous performance after 120 hours of heating at 75 ° C in the air.