Optical absorption in full composition range of ZnCuO thin films synthesized by spray pyrolysis

Optical characterization of ZnCuO and CdCuO composite thin films prepared using equal ratio of Zn, Cd and Cu.

“…It is also clear that the absorption coefficient value of ZnCuO decreases with the increase of the wavelength and it has two district peaks at the near-ultraviolet region (at 303 nm and 368 nm) with the values of 8.17 x 10 6 m -1 and 7.99 x 10 6 m -1 , respectively. When compared to the literature, it is seen that the absorption coefficient value of the fabricated ZnCuO thin film is high [22]. Unlike that, the absorption coefficient of CdCuO composite thin films peaks at the near-ultraviolet region (376 nm) and visible region (618 nm) with values of 11.1 x 10 5 m -1 and 10.3 x 10 5 m -1 , respectively.…”

“…It is seen that the Eg value of the CdCuO thin film is higher than the value of ZnCuO and this is thought to be caused by the difference in the atomic radii of Cd and Zn [23]. Additionally, it can be stated that Eg values of ZnCuO thin films are smaller than ZnCuO produced by spray pyrolysis [22], sol-gel methods [13], electrochemically Cu doped ZnO [12] and Co doped ZnCuO thin films [24]. Besides, it is obtained that the Eg value of the CdCuO is smaller than spray synthesized Cd doped CuO thin film [17].…”

Photoactive Antimicrobial CuZnO Nanocrystals

“…This work stretches the limit of zinc content in Cu 1−x Zn x O nanostructures obtained thus far via colloidal synthesis, reaching high zinc content without phase segregation. 21,29,30 In comparison to prior works in which the CuZnO nanoalloys were either prepared as films or via a sonochemical method, 23,26,28 the colloidal approach introduced herein provides several unique attributes. First, the ability to achieve shape control of the NCs by careful adjustment of the synthesis parameters.…”

“…Thin films of Cu 1−x Zn x O were produced by spray pyrolysis technique, showing homogeneity up to x = 0.10 or above x = 0.90, and coexistence of segregated phases for any intermediate regime (0.1 < x < 0.9). 28 Sonochemical synthesis stretched that limit to x = 0.12, avoiding phase segregation. 23 Performing the sonochemical reaction in situ in the presence of cotton cloth in the solution yielded highly potent antimicrobial activity, and the mechanism of action in dark conditions was studied extensively, showcasing the benefit of the alloy approach.…”

“…However, although copper and zinc have similar molar masses and ionic radii, forming such homogeneous alloys with substantial content of copper and zinc is challenging, due to the major differences between the crystal structures of their oxides. Thin films of Cu 1– x Zn x O were produced by spray pyrolysis technique, showing homogeneity up to x = 0.10 or above x = 0.90, and coexistence of segregated phases for any intermediate regime (0.1 < x < 0.9) . Sonochemical synthesis stretched that limit to x = 0.12, avoiding phase segregation .…”