The main components are 90% In2O3 and 10% SnO2. The ITO conductive film is an indium tin oxide film

Indium tin oxide filmIt is a transparent and colorless thin film of indium tin oxide, usually with two performance indicators: resistivity and transmittance. It is transparent and colorless when in the form of a thin film. When in block state, it appears yellow to gray.

The main characteristics of indium tin oxide are its combination of electrical conductivity and optical transparency. However, the thickness of the film has a significant impact on conductivity, so it needs to be controlled during the preparation process.

The conductive principle of ITO conductive film,ITO filmIt is an indium tin oxide film, mainly composed of 90% In2O3 and 10% SnO2. Its crystal structure is cubic iron manganese ore structure, which is a semiconductor material that can directly transition to a wide bandgap. The main component of ITO conductive film, In2O3, does not form an ideal chemical ratio structure during the formation process. The crystal structure lacks oxygen atoms, resulting in excess free electrons. Therefore, ITO film has a certain degree of conductivity.

How to improve the conductivity of ITO conductive film? If you want to improve the conductivity of ITO film, you can use expensive cations such as Sn doped in the In2O3 lattice to replace the position of In ^ 3. The concentration of free conductive electrons increases accordingly, thereby improving the conductivity of indium oxide and enhancing the conductivity of ITO film. It should be noted that in the ITO film layer, Sn usually exists in the form of Sn ^ 2 or Sn ^ 4. Since In is trivalent in In2O3, the presence of Sn ^ 4 creates an electron conduction band, while the presence of Sn ^ 2 reduces the electron density in the conduction band.

The process and method of preparing PDLC optical switches using phase separation technology with flexible ITO conductive film, single component UV optical curing adhesive NOA65, and biphenylcyanamide nematic liquid crystal mixture E7 at different ratios were described. The test results and analysis of the electro-optical characteristics were presented, and the optimal ratio was obtained with a threshold voltage of 12.6 V, a transmittance of 87.6%, and a contrast of 71.8.