Effects of Fe-doping on the Properties of CuAlO_2

摘要

We added different amount of Fe (NO_3)_3 to the solution made of aluminum nitrate, copper nitrate and isopropanol to form gel. CuAl_(1-x)Fe_xO_2 (x = 0, 0.01, 0.03, 0.05, 0.07, 0.09) powders and films were prepared in our experiments. The films were prepared on the quartz substrates. The powders and films were annealing at 1050 °C for 5 hours in the air. The powders were detected by X-ray diffraction to represent the structure of CuAl_(1-x)Fe_xO_2. The square resistance of the films was determined by RTS-8 four-probe. The lowest square resistance is of CuAl_(0.95)Fe_(0.05)O_2 film 3.3 KΩ/□. Ultraviolet spectrophotometer (UV-3600, 230VCE) was used to measure the transmittance of the films. Fe-doping has a positive impact on the conductivity but negative impact on the transmittance.