Science News: 2021 Nat. Nanotechnol., how 2-D materials improve the performance of micro-LED?

　　Nature Nanotechnology (IF 39.213) recently published the first international research on combining two-dimensional semiconductor TFT materials with Micro-LED new technology, providing a new method for the development of Micro-LED display technology in the future.

　　Micro-LED is a high-density display array technology formed by micron-sized LEDs as light-emitting units and assembled with drive modules. Compared with current technologies such as LCD and OLED, Micro-LED has cross-age advantages in brightness, resolution, energy consumption, service life, response speed, and thermal stability. However, the industrialization of Micro-LED still faces many challenges, such as the difficulty in matching the drive requirements and size of high-density display units, the cost and yield rate of Mass Transfer technology, and the difficulty in meeting the development of high-resolution displays.

　　In this research, the author used the back end of line (BEOL) process to integrate large-area MoS₂ thin-film transistors (TFT) and nitride micro-light-emitting diodes (LED), and developed a non-mass transfer low-temperature three-dimensional structural integration technology, which had excellent electrical performance and uniformity. After analyzing driving capability, response time, energy consumption and modulation scheme, the author found that MoS₂ TFT had high resolution and high brightness characteristics and realized a 32 × 32 array 1270 PPI microdisplay. The results of this research can satisfy cross-domain applications such as micro-display, vehicle-mounted display, and visible light communication in the future. Due to the unparalleled device performance in terms of atomic limit and low-temperature heterogeneity, two-dimensional materials have unlimited potential in future electronic products.