In the future, the sensitivity of smart bracelets is expected to be more precise, and the screen of foldable phones will also become "bright". This is thanks to the latest research results released by Professor Pei Jian's team from the School of Chemistry and Molecular Engineering at Peking University - the world's first ultra high precision doping of organic polymer semiconductors at the sub micron level. Subsequently, the sensitivity of intelligent sensing chips is expected to improve.
The precision processing of organic semiconductors is like finding water in the desert, "Pei Jian vividly translated scientific terms. Compared with traditional inorganic semiconductors, organic semiconductors have the advantages of being light, thin, soft, low-cost, and environmentally friendly. They have already demonstrated their skills in fields such as organic photovoltaic cells and flexible sensors.
For example, the light-emitting layer of foldable screen phones and the heart rate monitoring function of smart bracelets cannot do without the support of organic semiconductors, "he said, but improving their processing accuracy has always been a challenge for researchers. To put it more bluntly, we hope to upgrade the doping technology of high-performance n-type materials, thereby significantly improving the control efficiency and conductivity of material processing
The technology he mentioned involves injecting additional free electrons through the reaction between dopants and organic semiconductors, constructing complementary circuits, and improving device performance. Over the course of 10 years, Pei Jian led his team to develop two generations of doping technologies, ultimately achieving precise and controllable doping processes in organic polymer semiconductors, with conductivity improvements of up to 9 orders of magnitude.
Team member and doctoral student Wang Xinyi said that the precision of this operation can reach within 1 micron, which is close to the cutting-edge process level of the organic integrated circuit industry. The operation process is like holding a laser pen and writing on flexible materials
This technology has been successfully applied in more than 10 typical organic polymer semiconductors, with conductivity generally increased by 6 orders of magnitude, expanding the application scenarios of organic polymer semiconductor materials. In addition, this technology is highly compatible with the lithography process of the existing semiconductor industry, which can provide key support for the construction of high-performance organic integrated circuits and has important process feasibility and industrial transformation potential.
Pei Jian said that this achievement provides key technical support for the miniaturization and high-density integration of organic integrated circuits, which is expected to promote the upgrading of flexible display resolution, help improve the sensitivity of intelligent sensing chips, and accelerate the industrialization process of organic integrated circuits.