The polycrystalline copper oxide (CuO) thin films have been produced using method of spin coating onto the soda lime glass (SLG) as well as substrate of p-type Si (1 0 0) wafers at 500 ºC in furnace. The obtained undoped and Cr doped thin films of CuO have been comprehensively characterized via X-ray diffraction (XRD), ultraviolet-vis (UV-vis) spectroscopy, the current-voltage (I-V) and capacitance-voltage (C-V) characteristics for providing information on quality of the crystalline nature, change in energy band gap and electrical properties, respectively. Structural analysis results which obtained from XRD data demonstrate that CuO films conjunction with Cr doping indicated that all thin films have monoclinic polycrystalline nature, with two main peaks ( 002) and ( 111) with dhkl about 2.52 and 2.32 Å, respectively. The transmittance and energy band gap value of undoped and Cr doped thin films of CuO ranging in varying concentration ratio have been determined in the wavelength region of 300 to 1100 nm. UV-vis spectrum analysis results indicate that both transmittance value and energy band gap of the CuO films is changed with increasing Cr doping ratio in CuO solution at room temperature. The I-V and C-V characteristic of Cr:CuO/p-Si diodes were associated with the CuO/p-Si diodes. It is seen that doping of Cr had a significant change onv the obtained devices' performance. Thus, the Cr:CuO/p-Si diodes generated by 1% Cr doping using spin coating method had the highest light sensitivity compared with those of the other diodes.

Plasmonic metal nanoparticles (NPs), such as Ag, Au, Cu NPs, attract great interest due to their notable applications in biological, and chemical sensing. Researchers have studied the plasmonic metal NPs which have exceptional optical properties in a large spectral region. Metal NPs form a unique surface plasmon resonance (SPR) peak that is in the electromagnetic spectrum's visible part. The peak of SPR firmly depends on the NP's size, shape, dielectric constant, and medium that the particle is in. Light interacts with nanoparticles that are smaller than the wavelength of incident light in localized surface resonance. That leads Localised Surface Plasmon Resonance (LSPR) in which an oscillating local plasma around the NP with a certain frequency form. The LSPR detection is the most common method for wavelength shift measurement. Since analyte absorption causes a significant change on the value of local dielectric constant, the LSPR peak shifts. It is known that biological molecules such as proteins and antibodies can sensitively be detected while they affect the local dielectric environment. Therefore, Ag or Au based metal NPs can be used as a sensor with the help of LSPR wavelength shift technique. Among the metal NPs, Ag has a relatively higher refractive index sensitivity. Moreover, Ag NPs generate measurements that are more precise since they have a shaper LSPR peak. In our work, we produce plasmonic Ag NPs with various sizes and spherical shapes by making use of the Pulsed Laser Deposition (PLD) mechanism. Subsequently, we have investigate the LSPR peaks of these NPs via the UV-Vis spectroscopy. Additionally, biosensor properties of plasmonic Ag NPs are investigated by binding Protein A molecules to surface of the NPs. It is significant to mention here that we obtain an LSPR wavelength shift, which has a value around 100 nm/RIU.

The polycrystalline copper oxide (CuO) thin films have been produced using method of spin coating onto the soda lime glass (SLG) as well as substrate of p-type Si (1 0 0) wafers at 500 ºC in furnace. The obtained undoped and Cr doped thin films of CuO have been comprehensively characterized via X-ray diffraction (XRD), ultraviolet–vis (UV–vis) spectroscopy, the current–voltage ( I – V ) and capacitance–voltage ( C – V ) characteristics for providing information on quality of the crystalline nature, change in energy band gap and electrical properties, respectively. Structural analysis results which obtained from XRD data demonstrate that CuO films conjunction with Cr doping indicated that all thin films have monoclinic polycrystalline nature, with two main peaks (002) and (111) with d hkl about 2.52 and 2.32 Å, respectively. The transmittance and energy band gap value of undoped and Cr doped thin films of CuO ranging in varying concentration ratio have been determined in the wavelength region of 300 to 1100 nm. UV–vis spectrum analysis results indicate that both transmittance value and energy band gap of the CuO films is changed with increasing Cr doping ratio in CuO solution at room temperature. The I–V and C–V characteristic of Cr:CuO/p-Si diodes were associated with the CuO/p-Si diodes. It is seen that doping of Cr had a significant change onv the obtained devices’ performance. Thus, the Cr:CuO/p-Si diodes generated by 1% Cr doping using spin coating method had the highest light sensitivity compared with those of the other diodes.

In recent years, copper(II) oxide (CuO) thin films have attracted great interest from researchers due to their unique physical and chemical properties. In this study, silver (Ag) doped copper oxide thin films were produced on glass substrate by applying rotational coating technique at various additive ratios. Structural, morphological and optical properties of thin films prepared due to different silver doping were investigated using X-ray diffraction (XRD), scanning electron microscope (SEM) and UV-vis, respectively. XRD patterns of Ag-doped CuO films showed that all thin films were tenorite structured with polycrystalline nature. For the most prominent orientations, stress, interplanetary distance, crystal size and dislocation density were calculated using X-ray diffraction analysis. The highest crystal size value (111) belongs to the unadulterated CuO film for its preferential orientation, and it can be said to have high quality crystallinity. SEM measurement shows the presence of homogeneously dispersed nanostructure particles on the thin film surfaces, with very little agglomeration on the film surfaces. The result of SEM images is similar to the atomic force microscope (AFM). With the FEI Quanta 250 FEG scanning electron microscope with EDX coupling, the layer thickness of the films is around 460 nm. In addition, the optical properties of the obtained samples were analyzed in terms of band gap measurements, absorption and transmittance values using UV-vis. Ultraviolet-visible measurements of thin films show that the transmittance and absorption values of CuO thin film at room temperature change as a result of Ag doping. Likewise, the energy band gap changed with increasing Ag doping ratio.

Copper (II) oxide (CuO) has attained significant attention from researchers because of its unique chemical and physical properties. Ag-doped CuO thin films have been produced on the soda glass substrate (SLG) by spin coating technique at different doping ratios. Structural, morphological, and optical properties of thin films produced depending on altered silver ratios have been examined through X-ray diffraction (XRD) spectroscopy, scanning electron microscopy (SEM), and UV-vis absorption spectroscopy, respectively. Band gaps of prepared undoped and 1% Ag-doped CuO thin films have been measured as 1.90eV and 1.63eV, respectively. Ag/undoped CuO and Ag-doped CuO/ZnO/AZO solar cells have been modelled, and their photovoltaic parameters have also been calculated using the SCAPS-1D simulation program. This work aims to investigate the photovoltaic parameters that would improve the efficiency of a solar cell. The effect of Ag atoms on the efficiency of CuO solar cells has been investigated depending on the acceptor density (Na), the interface defect density (Nt), and the operating temperature. Ag-doped CuO solar cells have shown the highest efficiency for Nt=1010 cm-3 and Na=6, 5x1016 cm-3 values. It has been well observed that as the operating temperature increases, the solar cells’ power conversion efficiency decreases. The highest charge generation rates in the undoped and Ag-doped solar cells have been determined as 1.49×1022 1/cm3.s and 1.51×1025 1/cm3.s, respectively. All the results, either theoretical or experimental, have been presented in this work and have been compared for a conclusion that has been made in detail.