Journal of Ovonic Research最新文献_第5页

Influence of bath temperature and deposition time on hardness and magnetisation of electrodeposited Nickel Manganese Tungsten thin films 镀液温度和沉积时间对电沉积镍锰钨薄膜硬度和磁化性能的影响

IF 1 4区材料科学

Journal of Ovonic Research Pub Date : 2023-04-01 DOI: 10.15251/jor.2023.192.231

P. Kirthika, N. Thangaraj, P. Anitha

引用次数: 0

Structural, optical and electrical properties of sulphide based heterojunction thin film 硫化物基异质结薄膜的结构、光学和电学性质

IF 1 4区材料科学

Journal of Ovonic Research Pub Date : 2023-04-01 DOI: 10.15251/jor.2023.192.207

E. Obot, C. Augustine, R. Chikwenze, S. Amadi, P. Okpani, P. Kalu, B. J. Robert, O. Nwoke, A.E. Igweoke, R. O. Okoro

{"title":"Structural, optical and electrical properties of sulphide based heterojunction thin film","authors":"E. Obot, C. Augustine, R. Chikwenze, S. Amadi, P. Okpani, P. Kalu, B. J. Robert, O. Nwoke, A.E. Igweoke, R. O. Okoro","doi":"10.15251/jor.2023.192.207","DOIUrl":"https://doi.org/10.15251/jor.2023.192.207","url":null,"abstract":"This contribution presents structural, optical and electrical properties of PbS/CdS thin films at different annealing temperatures. The XRD analysis reveal the existence of three different crystalline phases, i.e., the beta-CdS, hawleyite-CdS and greenockite-alpha-CdS phases within the CdS-shell of PbS/CdS core shell thin film. The dislocation density and microstrain decreased with annealing temperatures indicating a decrease in lattice imperfections and formation of high quality film and it can be attributed to the increase in grain size of the film with increase in annealing temperatures. Optical studies placed the band gaps at 1.25eV-1.75eV. About the same magnitude were found from electrical conductivity test. The samples exhibited high conductivity with increasing annealing temperatures which resulted to the bumping of electrons from the valence band to the conduction band. The high absorbance suggest that the film could be coated on collectors to enhance solar energy collection. The achieved band gaps placed the PbS/CdS fabricated with the presented method as a good material for solar photovoltaic applications.","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49082069","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of reduced graphene oxide hybridization on ZnO nanoparticles sensitivity to NO2 gas: A DFT study 还原氧化石墨烯杂化对ZnO纳米粒子对NO2气体敏感性的影响:DFT研究

IF 1 4区材料科学

Journal of Ovonic Research Pub Date : 2023-03-01 DOI: 10.15251/jor.2023.192.153

M. A. Abdulsattar, M. Hussein, M. Kahaly

引用次数: 0

Analysis of a-Si:H/SiGe heterostructure solar cell a-Si:H/SiGe异质结构太阳能电池分析

IF 1 4区材料科学

Journal of Ovonic Research Pub Date : 2023-03-01 DOI: 10.15251/jor.2023.192.165

L. Ayat, A. Idda

引用次数: 0

Effect of silver-doping on the structural, topography and optical CdSe thin films 银掺杂对CdSe薄膜结构、形貌及光学性能的影响

IF 1 4区材料科学

Journal of Ovonic Research Pub Date : 2023-03-01 DOI: 10.15251/jor.2023.192.187

R. I. Jasim, E. H. Hadi, S. Chiad, N. Habubi, M. Jadan, J. Addasi

引用次数: 0

Effects of inorganic MnO2 and ZnO nanofillers on the structural investigations and dielectric behaviour of PVA polymeric materials 无机MnO2和ZnO纳米填料对PVA聚合物结构研究和介电性能的影响

IF 1 4区材料科学

Journal of Ovonic Research Pub Date : 2023-03-01 DOI: 10.15251/jor.2023.192.175

B. M. Alotaibi, H. Al-Yousef, A. Atta, F. Taher

引用次数: 0

Correlation between optical and shielding properties of phosphate glasses with alkaline oxide and their application 碱性氧化物磷酸盐玻璃光学性能与屏蔽性能的相关性及其应用

IF 1 4区材料科学

Journal of Ovonic Research Pub Date : 2023-03-01 DOI: 10.15251/jor.2023.192.141

K. I. Hussein, M. Alqahtani, A. Almarhaby, R. S. Alayyash, E. Elshiekh

{"title":"Correlation between optical and shielding properties of phosphate glasses with alkaline oxide and their application","authors":"K. I. Hussein, M. Alqahtani, A. Almarhaby, R. S. Alayyash, E. Elshiekh","doi":"10.15251/jor.2023.192.141","DOIUrl":"https://doi.org/10.15251/jor.2023.192.141","url":null,"abstract":"In numerous tissue engineering and dental applications, bioactive glasses are utilized. These glasses have unique characteristics that make them attractive candidates for a variety of applications. A new bioactive glass system with the structure of 45P2O5 − 20CaO − 15CaCL2 − 8KF − (10 − x) Li2O − (x) TiO2 was developed in this study, with x = 2, 6, and 8 mol%. For usage in radiation protective applications, it was evaluated. By using an ultraviolet–visible spectrophotometer, we were able to measure the absorbance (Abs) and transmittance (T %) in the range of wavelengths 190–2500 nm. Furthermore, the optical energy gap of the produced glasses was determined. Using the MIKE software, the mass attenuation coefficients (MAC) of the bioactive glasses under investigation were calculated for energies ranging from 15 to 200 keV. The 𝐿𝐿𝐿𝐿𝐿𝐿, 𝑍𝑍𝑒𝑒𝑒𝑒𝑒𝑒, 𝑁𝑁𝑒𝑒𝑒𝑒𝑒𝑒, 𝐻𝐻𝐻𝐻𝐻𝐻, 𝑇𝑇𝑇𝑇𝑇𝑇, 𝑎𝑎𝑎𝑎𝑎𝑎 𝑀𝑀𝑀𝑀𝑀𝑀 (Linear attenuation coefficient, effective atomic number, effective electron density, half value layer, tenth value layer, and mean free path) of the bioactive glasses were calculated. According to the findings, the addition of titanium dioxide (TiO2) as well as the metal oxide such as Li2O to bioactive glasses generates significant differences in the attenuation characteristics of bioactive glasses. The results indicate that the PCKLT3( 𝑇𝑇𝑇𝑇𝑇𝑇2= 8mol%) bioactive-glass sample had the best attenuation among other samples.","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43483987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study the effect of Ni doping on structural, optical and electrical properties of Zn1-xNixO thin films deposited by spray pyrolysis technique 研究了Ni掺杂对喷雾热解法制备Zn1-xNixO薄膜结构、光学和电学性能的影响

IF 1 4区材料科学

Journal of Ovonic Research Pub Date : 2023-03-01 DOI: 10.15251/jor.2023.192.197

C. Zaouche, L. Dahbi, S. Benramache, A. Harouache, Y. Derouiche, M. Kharroubi, H. A. Haslouk, M. A. A. Banalhag, H. M. Alkhojah

{"title":"Study the effect of Ni doping on structural, optical and electrical properties of Zn1-xNixO thin films deposited by spray pyrolysis technique","authors":"C. Zaouche, L. Dahbi, S. Benramache, A. Harouache, Y. Derouiche, M. Kharroubi, H. A. Haslouk, M. A. A. Banalhag, H. M. Alkhojah","doi":"10.15251/jor.2023.192.197","DOIUrl":"https://doi.org/10.15251/jor.2023.192.197","url":null,"abstract":"The effect of Ni doping on structural, optical and electrical properties of deposited Zn1-xNixO thin films on glass substrate by spray pyrolysis technique has been studied. The main objective of this research is to study the change of the physical and optical properties of Zn1-xNixO thin films that are fabricant to semiconductor with different doping levels x. These levels are 0 at.%, 2 at.%, 4 at.%, 8 at.% and 12 at.%. The transmission spectra show that the Zn1-xNixO thin films have a good optical transparency in the visible region from 88 to 95%. The optical gap energy of the Zn1-xNixO thin films varied between 3.25 and 3.35 eV. The urbach energy varied between 65 and 230 meV. However, the Zn0.88Ni0.12O thin films have many defects with maximum value of urbach energy. The Zn0.88Ni0.12O thin films have minimum value of optical gap energy. The Zn0.88Ni0.12O thin films have maximum value of the electrical conductivity which is 9.40 (Ω.cm)-1 . The average electrical conductivity of our films is about (7.52 (Ω.cm)-1 ). XRD patterns of the Zn1- xNixO thin films indicate that films are polycrystalline with hexagonal wurtzite structure.","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43923269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electron confinement enhancement in AlGaN/AlN/GaN HEMT using BGaN buffer BGaN缓冲液在AlGaN/AlN/GaN HEMT中的电子约束增强作用

IF 1 4区材料科学

Journal of Ovonic Research Pub Date : 2023-02-20 DOI: 10.15251/jor.2023.191.81

M. Gassoumi, A. Helali, Z. Elleuch, N. Boughdiri, H. Guesmi, S. Rejab, H. Maaref

引用次数: 0

The development of ultra-high aluminium graphene metal matrix composites (MMC) and improved the thermo-mechanical properties 超高铝石墨烯金属基复合材料(MMC)的开发和热力学性能的改善

IF 1 4区材料科学

Journal of Ovonic Research Pub Date : 2023-02-20 DOI: 10.15251/jor.2023.191.87

M. Velliangiri, M. Karthikeyan, G. Sureshkannan

{"title":"The development of ultra-high aluminium graphene metal matrix composites (MMC) and improved the thermo-mechanical properties","authors":"M. Velliangiri, M. Karthikeyan, G. Sureshkannan","doi":"10.15251/jor.2023.191.87","DOIUrl":"https://doi.org/10.15251/jor.2023.191.87","url":null,"abstract":"Powder metallurgy has made it easier to develop Ultra high Al-Gr (5 wt% Gr) composite materials for commercial solar thermal collectors. This work seeks an optimum aluminumgraphene composite with superior thermo-mechanical properties for the thermal collector. Experimentally found that an AMMC matrix with 1.0 wt% of Gr has 282 W/mK thermal conductivity, 129 percent developed than Al (123 W/mK), and also found Al+Gr has a lower thermal expansion coefficient than pure Al. Predicted different composite densities and focused to retain 96.5 percent of aluminum density after sintering. Investigated analytical techniques and included some investigation like Raman spectroscopy, X-ray diffraction, FESM, and electricity-dispersive X-ray grain size and property and also identified high-quality composites and predicted their homogeneity and invulnerability. Predicted suitable Sintering temperature was 626 degrees Celsius which increased from 300 degrees Celsius. Energy and thermal conductivity were found that increases with increasing temperature and compared to pure Al. According to this investigation, when increased the graphene weight percentage proportion from 0 to 5.0 wt%. Results show that conductivity increases from 210 to 412 W/mK and mechanical characteristics slightly drop from 16 to 19% as pH rises from 5 to 5.5. Based on this investigation Al+Gr composites may be used for solar thermal collectors and heat sinks and also appropriate ultra-high Al+5.5 wt% suitable for solar collectors.","PeriodicalId":54394,"journal":{"name":"Journal of Ovonic Research","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46807989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0