The world's first mobile phone graphene capacitive touch screen was successfully developed
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On January 8, Jiangnan Graphene Research Institute was released. The world's first mobile phone graphene capacitive touch screen was successfully developed in Changzhou. This achievement was investigated by the Shanghai Institute of Scientific and Technical Information and Xiamen University. It was shown as the first in China, and foreign countries are still in the stage of R&D and concept machines.
The indispensable material in the working layer of the existing mobile touch screen is a ceramic material of indium tin oxide. Indium tin oxide is expensive, bulky, brittle, and toxic (comparable to the toxicity of lead). The synthesis of graphene touch screens is environmentally friendly and requires less resources. With the continuous improvement of the production process, the production cost is expected to be much lower than that of traditional indium tin oxide touch screens.
The graphene capacitive touch screen project for mobile phones jointly developed by Jiangnan Graphene Research Institute, Changzhou 2D Carbon Technology Co., Ltd., and Wuxi Rieger Optoelectronics Technology Co., Ltd. and Shenzhen Ricoh Photoelectric Sensor Technology Co., Ltd. completed graphene-based thin film The process flow debugging of the mobile phone touch screen module was successfully completed, and a prototype of a capacitive touch screen mobile phone was successfully completed. Functional tests were completed and a graphene capacitive touch screen mobile phone capable of realizing basic functions was introduced. The entire touch area of ​​the capacitive screen sensor can recognize single-finger and two-finger touches and perform line drawing actions, so as to realize single-finger gesture left-right dragging and two-finger gesture zooming and rotation.
According to Dr. Qingqing Yu of Changzhou 2D Carbon Technology Co., Ltd., compared with traditional indium tin oxide touch screens, the result is that, in addition to functional replacement, it is more important to have excellent flexibility. On the technical level, the advent of this achievement has shortened the industry's time expectation for the industrialization of graphene materials for 810 years. This year, the result can provide 100,000 touch screens for mobile phone operators, which cost 30% less than current materials.
Xue Qikun, academician of the Chinese Academy of Sciences, professor of Tsinghua University and honorary director of the Jiangnan Graphene Research Institute believes that this project has overcome the technical difficulties in the preparation of graphene films that can meet the technological requirements of touch screens for mobile phones, achieving large size, high uniformity, high conductivity, and high transparency. The continuous preparation of light graphene films; demonstrated the unique performance advantages of graphene film transparent electrode materials, good commercial value and broad market prospects; the use of graphene films broadens the future of flexible electronic display devices and flexible solar cells The commercialization of product development. (Wu Dongkang Xue Jing Bai Sai Xue reporter Ding Xiuyu)
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