It is difficult to assemble graphene directly onto large-area substrates , but Stanford University's research team claims that they have successfully developed a low-cost, solution-based spin-coating distribution. Technology that can be used to make graphene transparent electrodes for O LED displays.
According to US researchers, indium tin oxide (ITO) graphene is expected to be a cheaper, thinner, and faster alternative to rare and expensive graphene. ITO is generally used as a transparent electrode for OLED displays. Once graphene is used as a substitute, the problem of ITO shortage can be avoided and the development of soft display technology can be smoother.
Junbo Wu, a Ph.D. candidate who conducted the above research with Peter Peumans, a professor of electrical and electrical engineering at Stanford University, said: "We have developed electrodes with a thickness of only a few nanometers, which gives display engineers greater freedom in product design;" The research team is currently trying to omit the vacuum annealing steps they currently use to improve the conductivity of the material on quartz substrates, so that graphene electrodes can be fabricated on soft plastic substrates at low temperatures.
The current OLED display uses inorganic ITO to make transparent electrodes for switching pixels. However, this material is expensive, and because it is also used in the process of LCD flat panel display, the supply is often insufficient. The researchers said that if they switch to graphene, the cost is less than one percent of ITO. In addition, graphene has higher electron mobility and can make electrodes thinner, more transparent, and more conductive. Therefore, an ultra-thin flexible OLED display can be produced.
According to US researchers, indium tin oxide (ITO) graphene is expected to be a cheaper, thinner, and faster alternative to rare and expensive graphene. ITO is generally used as a transparent electrode for OLED displays. Once graphene is used as a substitute, the problem of ITO shortage can be avoided and the development of soft display technology can be smoother.
Junbo Wu, a Ph.D. candidate who conducted the above research with Peter Peumans, a professor of electrical and electrical engineering at Stanford University, said: "We have developed electrodes with a thickness of only a few nanometers, which gives display engineers greater freedom in product design;" The research team is currently trying to omit the vacuum annealing steps they currently use to improve the conductivity of the material on quartz substrates, so that graphene electrodes can be fabricated on soft plastic substrates at low temperatures.
The current OLED display uses inorganic ITO to make transparent electrodes for switching pixels. However, this material is expensive, and because it is also used in the process of LCD flat panel display, the supply is often insufficient. The researchers said that if they switch to graphene, the cost is less than one percent of ITO. In addition, graphene has higher electron mobility and can make electrodes thinner, more transparent, and more conductive. Therefore, an ultra-thin flexible OLED display can be produced.
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