Article
Chemistry, Physical
Anupama Chanda, Shalik Ram Joshi, V. R. Akshay, Shikha Varma, Jai Singh, M. Vasundhara, Prashant Shukla
Summary: The investigation focused on the effects of multilayers and cobalt (Co) doping on the structural and optical properties of TiO2 thin films. The findings showed that Co-doped TiO2 multilayered films exhibited enhanced values of refractive index, transmittance, and blue emission, making them promising for optical device applications.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Saima Afroz Siddiqui, Deshun Hong, John E. Pearson, Axel Hoffmann
Summary: Antiferromagnetic oxides have attracted attention due to their potential for manipulation of Neel vectors electrically and optically, as well as their fast spin dynamics and long spin diffusion length. This study successfully deposited Cr2O3 and α-Fe2O3 on A-plane sapphire substrates using sputtering deposition, identifying optimized conditions for epitaxial films with low surface roughness and confirming their antiferromagnetic properties. The developed deposition method will be important for studying magnon transport in these epitaxial antiferromagnetic thin films.
Article
Optics
Manohar Singh, Anit K. Ambedkar, Shrestha Tyagi, Virendra Kumar, Prashant Yadav, Ashwani Kumar, Yogendra K. Gautam, Beer Pal Singh
Summary: In this study, pure ZnO and Cu-doped ZnO thin films were deposited on a glass substrate using reactive co-sputtering. The structural, morphological, and optical properties of the thin films were characterized. The results showed that Cu doping modified the crystal structure, surface morphology, and optical properties of ZnO thin films. These findings are important for the research and applications of Cu-doped ZnO thin films.
Article
Chemistry, Multidisciplinary
Krishna Chandra Dubey, Anam Zaidi, Ram Raseele Awasthi
Summary: In this research, Zn1-xAlxO thin films with varying proportions of Al were prepared and characterized for their crystal structure, morphology, and humidity-sensing properties. The results showed that increasing the Al-doping concentration led to larger crystallite sizes, changes in surface morphology, and improved humidity sensing performance.
Article
Optics
Manale Battas, El Mustapha El Jald, Ibrahima Soumahoro, Mohammed Regragui, Azzam Belayachi, Lahoucine Atourki, Mohammed Abd-Lefdil
Summary: This study investigated the structural and optical properties of sprayed Zn1-xFexO (ZFO) thin films through experimental characterizations and theoretical calculations. The substitution of Zn2+ ions by iron ions in ZFO films was confirmed, leading to a noticeable redshift in the emission peak. The scalar scattering theory within the Rayleigh scattering formula was used to calculate the simulated haze factor, showing a strong correlation between crystalline quality, surface morphology, and optical properties.
Article
Chemistry, Physical
Chenlin Wang, MinJu Ying, Jie Lian, MingYang Wei, Qingfen Jiang, Zhen Xu, Yu Zhang, Yueming Wang
Summary: In this work, ion implantation of Mn and As ions into ZnO films significantly altered their optical properties, leading to changes in refractive index and extinction coefficient. The presence of Mn ions also introduced a halfmetallic property to the ZnO films, resulting in gentler variations in optical characteristics. These findings suggest new possibilities for the design and optimization of optoelectronic devices utilizing ZnO thin films with semi-metallic properties.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Zhong-Ying Feng, Xiao-Li Duan, Wen-Jing Yang, Xiao-Wei Wang, Li-Chen Chai, Zun-Guang Guo, Yan Yang
Summary: The structural, electronic, magnetic and optical properties of substitutionally doped CoS2 by B, C, Si and Al atoms were investigated. The materials show metallic or half metallic character, making them suitable for spintronic applications. They also exhibit enhanced absorption coefficient for purple and ultraviolet light, showing potential for optoelectronic applications in ultraviolet absorption.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Bhubesh Chander Joshi, Aadarsh Kumar Chaudhri
Summary: In this study, Cu-doped ZnO thin films were prepared using the sol-gel method. The doping concentration was found to affect the crystallite size, band gap, and conductivity of the films. The doped films showed p-type conductivity initially but degraded with time. Ambient-exposed films converted to n-type, while vacuum-placed films maintained p-type behavior. It is suggested that if these films are well prepared, protected, and properly passivated, they can be used for optoelectronics devices.
Article
Chemistry, Multidisciplinary
Victor V. Petrov, Irina O. Ignatieva, Maria G. Volkova, Irina A. Gulyaeva, Ilya V. Pankov, Ekaterina M. Bayan
Summary: Transparent Al-doped ZnO films were synthesized by solid-phase pyrolysis and characterized by XRD, SEM, and TEM. The films exhibit wurtzite structure and have a uniform distribution of nanoparticles. The introduction of 1% Al results in a narrowed band gap and improved response time to radiation.
Article
Nanoscience & Nanotechnology
Camila Ianhez-Pereira, Ariano De Giovanni Rodrigues, Marcio Peron Franco de Godoy
Summary: This study investigated the infrared optical emission of Er3+ doped ZnO hosts, using spray pyrolysis during thin film growth. Different molarity conditions affected the growth of the films and their optical properties. The infrared emissions were influenced by the Stark effect, which was dependent on synthesis parameters.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Ceramics
Aziz Nfissi, Mounir Belhajji, Abdelhak Chouiekh, Abdelilah Rjeb, Abdelfettah Barhdadi, Salaheddine Sayouri, Yahya Ababou
Summary: Cadmium oxide (CdO) thin films were successfully deposited on glass substrates by the sol-gel spin coating method. The effects of the annealing temperature and Zirconium (Zr) doping on the physical properties of the CdO thin films were investigated. It was found that 550 °C is the optimal annealing temperature with a good crystallinity for the CdO thin films. Then, by using this temperature, different Zr doping concentrations (0, 1, 3, 5 and 7%) were prepared at the same experimental conditions. The X-ray diffraction (XRD) patterns of all the as-prepared thin films showed a polycrystalline nature with a face centered cubic (FCC) structure and that Zr incorporated the sites of Cadmium (Cd) up to 3% concentration, while the excess Zr doping (x > 3%) aggregated at the grain boundaries of the CdO lattice. Scanning electron microscopy (SEM) analysis revealed homogeneous and dense grains distribution with a film thickness of 30 μm. The optical study showed an increase in optical transmittance of CdO with Zr doping up to 3% and then a decrease onwards within the same wavelength region. The optical band gap values increased from 2.41 to 2.67 eV with increasing Zr doping which was explained by the Burstein-Moss effect. The minimum electrical resistivity (5.32 x 10(-1) Ω·cm) was obtained for the film coated with 3% Zr using the four-probe method.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Gharieb A. Ali, M. Emam-Ismail, M. El-Hagary, E. R. Shaaban, S. H. Moustafa, M. Amer, H. Shaban
Summary: A series of Zn1-xCuxO nanocrystalline films were deposited on a silica substrate using e-beam evaporation technology, where Cu doping was found to improve the optical energy band gap and other optical properties of the films. The research findings suggest that Cu doped ZnO films have great potential for optoelectronic device applications due to the tunability of various optical parameters with increasing Cu doping levels.
Article
Materials Science, Multidisciplinary
Seval Aksoy Pehlivanoglu, Ozgur Polat
Summary: ZnO and Ir-doped ZnO thin films were fabricated by sol-gel spin coating technique. The structures and properties of the films were investigated. The addition of Ir increased the volume of the unit cell, atomic packing fraction, and grain size of the thin films. Optical bandgap decreased with Ir substitution. The transmittance and optical dielectric properties were also affected by Ir doping.
Article
Optics
Mohd Shkir, Aslam Khan, Mohd Imran, M. Ajmal Khan, Rayees Ahmad Zargar, Thamraa Alshahrani, K. Deva Arun Kumar, P. Mohanraj, Kamlesh Chandekar, S. AlFaify
Summary: In this study, different Neodymium contents loaded cobalt oxide nanostructured thin films were fabricated using facile spray pyrolysis method, and their structural, optical, and electrical properties were investigated.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Metallurgy & Metallurgical Engineering
Emine Guneri, Johnson Henry, Fatma Gode, Nilgun Kalaycioglu Ozpozan
Summary: Pure ZnO and Mn-doped ZnO thin films were prepared by chemical bath deposition method with various Mn doping concentrations. The structural, morphological, and optical properties of the films were analyzed using different techniques. XRD analysis revealed hexagonal structured ZnO in all films, with a peak shift observed in Mn-doped films. The crystallite size increased with Mn doping. The surface morphology of Mn-doped films exhibited irregularly shaped agglomerated particles. The transmittance spectra showed higher transmittance in the visible region, which decreased with Mn doping, indicating increased optical absorption. The band gap of Mn-doped films decreased with Mn doping. Mn-doped films exhibited higher optical and electrical conductivity in the UV region.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2023)
Article
Materials Science, Multidisciplinary
E. M. M. Ibrahim, A. Z. Mahmoud, L. Galal, Y. El Sayed, E. R. Shaaban
Summary: The structural and optical properties of Zn1-xCoxO nanocrystalline films were studied, indicating an increase in refractive index with more Co doping. The calculation of optical energy gap suggests a direct transition for the Zn1-xCoxO film.
JOURNAL OF OVONIC RESEARCH
(2021)
