Cp Company Present Exclusive Very Expensive Films

Cp Company Present Exclusive Very Expensive Films

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The electrical transport properties of single crystalline films of theproposals materials have been measured by the standard four-probemethod. There are some negative temperature dependence of theresistivity, in the range -70 percent to -100 percent; notice that theobtained value for the linearity coefficient eta (b) varied from -0.7 to -0.9depending on the manufacturer. It is important to notice that the filmproperties are not self-limiting, since a gradual change in the chemicaland/or physical properties from the substrates toward the systemfront is observed by extending the film thickness. These results clearlyreveal that the indium zinc oxide is an interband transitionsemi-conductor and the indium tin oxide is an intrasubbandtransition semiconductor.

The conductivity of ITO was found to decrease with annealing temperatureand doped with different amounts of SnO2 up to 5 at.%. In all thecases, the resistivity of ITO remained practically constant in the hightemperature range of 600 degrees K to 900 degrees K. The crystallinequality of the n-type ITO was in agreement with the EBSD data. From theelectronic band structure calculations, the band gaps of bothmaterials were estimated at 1.60 eV and 0.83 eV, for ITO and IZO,respectively. The electrons of the valence band are mainly composed onorbitals of In and O, while for the conduction band electron orbitals ofSn exhibit a considerable contribution. In conclusion, the ITO/IZOsystems considered were‘metallic’ with the possibility of electrical conductivity even at lowtemperatures, however n-type of the material would be required to actas a transparent electrode. d2c66b5586