Journal of Ovonic Research最新文献

Designing and studying of PVA/Fe2O3/Se as new ovonic material for possible storage application PVA/Fe2O3/Se新型电子材料的设计与研究

4区材料科学

Journal of Ovonic Research Pub Date : 2023-11-01 DOI: 10.15251/jor.2023.196.615

K. A. Mohammed, K. H. Salem, M. F. Jawaad, M. A. Alkhafaji, R. S. Zabibah

{"title":"Designing and studying of PVA/Fe2O3/Se as new ovonic material for possible storage application","authors":"K. A. Mohammed, K. H. Salem, M. F. Jawaad, M. A. Alkhafaji, R. S. Zabibah","doi":"10.15251/jor.2023.196.615","DOIUrl":"https://doi.org/10.15251/jor.2023.196.615","url":null,"abstract":"This study presents the synthesis of a novel ovonic nanomaterial by the chemical route approach, involving the combination of three distinct materials: polyvinyl alcohol (PVA), iron oxide (Fe2O3), and selenium (Se) nanoparticles. The produced material underwent evaluation using various analytical techniques, including Xray diffraction (XRD), energydispersive Xray spectroscopy (EDS), scaning electron microscope (SEM), and UV-Visible spectrophotometer. The focus of the work revolved around a unique hybrid structure consisting of selenium nanoparticles that were embedded within a polyvinyl alcohol and iron(III) oxide. The examination of micro structure information yielded findings that support the notion that Se nanoparticles have an impact on the structural properties of PVA/Fe2O3. (XRD) and (EDS) examines provided confirmation of the formation of a novel composite structure. The produced composites had notable absorption peaks at a wavelength of 530 nm for PVA-Fe2O3-CdZnS. These composites exhibited a progressive transition towards absorption in higher wavelength areas. The composite material that has been suggested for potential utilization in forthcoming energy storage applications.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135615820","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 ratio gold nanoparticles on the properties and efficiency photovoltaic of thin films of amorphous tungsten trioxide 比例金纳米颗粒对非晶三氧化钨薄膜性能及光电效率的影响

4区材料科学

Journal of Ovonic Research Pub Date : 2023-11-01 DOI: 10.15251/jor.2023.196.623

M. H. Mustafa, A. A. Shihab

{"title":"Effect of ratio gold nanoparticles on the properties and efficiency photovoltaic of thin films of amorphous tungsten trioxide","authors":"M. H. Mustafa, A. A. Shihab","doi":"10.15251/jor.2023.196.623","DOIUrl":"https://doi.org/10.15251/jor.2023.196.623","url":null,"abstract":"At a substrate temperature of 320 o C, a chemical spray pyrolysis approach was applied. to create tungsten oxide thin films on glass substrates with varying Au nanoparticle doping concentrations (0, 0.04 and 0.08 M) that have a thickness of roughly 250 nm. Investigated were the structural and optical characteristics. The films were amorphous to the pure films at the substrate temperature (320 °C), according to X-ray diffraction and remain so even after adding GNPs, because the WO3 structure is amorphous in all samples, whereas the cubic structure of the gold nanoparticles. The morphology of the films was examined using atomic force microscopy (AFM), which showed a decrease in the grain size of the films doped with gold compared to the thin films before the doping process. a UV-Vis spectrophotometer was used to examine the membranes' optical characteristics between the wavelengths of (300-1000) nm. was the optical energy gap of the films (3.23) eV for tungsten oxide film and decreased after adding nanoscale gold to (3.04, 2.95) eV for films doped with different proportions of Au NPs (0.04, 0.08 M), respectively. Hall testing confirms that with 8 (mM) Gold (Au) doping, WO3 material of the n type was obtained with a maximum carrier mobility of 219.92(cm2 /Vs) and conductivity of 6.52 (Ω.cm)-1 . The I-V characteristics of the photovoltaic formed under illumination were determined by measuring the incident power density (100 mW/cm2 ) at varied Au doping levels.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":"56 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135615193","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 of eigen frequency In1-xGaxAsyP1-y 1.55 µm VCSEL with SiO2 /TiO2 dielectric Bragg reflector SiO2 /TiO2介质Bragg反射器对1- xgaxasyp1 -y 1.55µm VCSEL本征频率的研究

4区材料科学

Journal of Ovonic Research Pub Date : 2023-11-01 DOI: 10.15251/jor.2023.196.607

A. Missoum, N. G. Sabri, M. Daoudi, H. Guedaouria, A. Benamara

{"title":"Study of eigen frequency In1-xGaxAsyP1-y 1.55 µm VCSEL with SiO2 /TiO2 dielectric Bragg reflector","authors":"A. Missoum, N. G. Sabri, M. Daoudi, H. Guedaouria, A. Benamara","doi":"10.15251/jor.2023.196.607","DOIUrl":"https://doi.org/10.15251/jor.2023.196.607","url":null,"abstract":"In this work, we focused on investigating the eigen frequency and internal standing wave characteristics of a vertical surface cavity emitting laser operating at a wavelength of 1.55 µm. The design of the cavity involved determining the cavity length, selecting the material for the cavity spacer, and carefully placing the quantum wells within the cavity to achieve maximum overlap with the electric field. In our case, the choice of the dielectric Bragg mirror with SiO2/TiO2 layers helps in achieving high reflectivity and low optical losses. The quantum wells are strategically placed within the cavity to ensure maximum overlap with the electric field. This allows for efficient carrier injection and recombination, leading to laser emission. The specific composition of the quantum wells, In0.54Ga0.46As0.99P0.01 / In0.75Ga0.25As0.55P0.45, indicates the proportions of indium (In), gallium (Ga), arsenic (As), and phosphorus (P) in the material. These compositions are chosen to achieve the desired electronic band structure and emission wavelength. By studying the eigen frequency and internal standing waves in our designed laser cavity, our aim is to understand the resonant modes and behavior of light within the device. This knowledge is crucial for optimizing the laser's performance and improving its efficiency for various applications.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":"2019 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135614423","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 properties of NC-TiO2 grains on the performance of organic/inorganic solar cells NC-TiO2颗粒性质对有机/无机太阳能电池性能的影响

4区材料科学

Journal of Ovonic Research Pub Date : 2023-10-01 DOI: 10.15251/jor.2023.195.587

H. Al-Dmour, D.M. Taylor

引用次数: 0

Tailoring of Structural, electrical, and dielectric properties of Mg-Mn-Bi nanoferrites with addition of Zn 添加Zn对Mg-Mn-Bi纳米铁氧体结构、电学和介电性能的影响

4区材料科学

Journal of Ovonic Research Pub Date : 2023-10-01 DOI: 10.15251/jor.2023.195.557

H. T. Ali, M. Akhtar, M. I. Arshad, N. Amin, A. U. Rehman, Z. Latif, M. A. Mehmood, M. A. Naveed

引用次数: 0

Composite nanostructured growth of (CdS)0.75 (PbS)0.25/Si solar cell and its characterization (CdS)0.75 (PbS)0.25/Si太阳能电池的复合纳米结构生长及其表征

4区材料科学

Journal of Ovonic Research Pub Date : 2023-10-01 DOI: 10.15251/jor.2023.195.567

E. M. Nasir, I. S. Naji, A. A. Ramadhan

{"title":"Composite nanostructured growth of (CdS)0.75 (PbS)0.25/Si solar cell and its characterization","authors":"E. M. Nasir, I. S. Naji, A. A. Ramadhan","doi":"10.15251/jor.2023.195.567","DOIUrl":"https://doi.org/10.15251/jor.2023.195.567","url":null,"abstract":"By using vacuum evaporation, thin films of the (CdS)0.75-(PbS)0.25 alloy have been deposited to form a nanocrystalline composite. Investigations were made into the morphology, electrical, optical and I-V characteristics of (CdS)0.75-(PbS)0.25 films asdeposited and after annealing at various temperatures. According to AFM measurements, the values of grain sizes rise as annealing temperatures rise, showing that the films' crystallinity has been increased through heat treatment. In addition, heat treatment results in an increase in surface roughness values, suggesting rougher films that could be employed in more applications. The prepared films have direct energy band gaps, and these band gaps increase with the increase in the degrees of annealing temperature. Additionally, Urbach energy values decrease with an increase in annealing temperature degrees, indicating a reduction in the tail defects and an enhancement in crystal structure through annealing. The produced films' conductivity raise when temperature in the range (RT-473)K increased, demonstrating that they are semiconducting films. At comparatively lower temperature degrees, the conduction is caused by carriers that are stimulated into localized states at the band edges. At relatively higher temperatures, the conductivity appears to be substantially temperature-dependent. As a result, the conduction mechanism results from carriers being excited into extended states beyond mobility edges. The photovoltaic measurement (I–V) properties, open circuit voltage, short circuit current, efficiency and fill factor of (CdS)0.75-(PbS)0.25 heterostructure cells have been examined under 100mW/cm2 . Interestingly, rising annealing had enhanced photovoltaic cell performances; the solar cell had shown its highest efficiency (0.42%) at 573K. From XRD the structures are polycrystalline with cubic and hexagonal structures indicating that there’s a mix of phases of PbS and CdS, the grain size and intensity raise with annealing temperatures.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135459251","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

Development of chitosan base graphene oxide/ WO3 hybrid composite for supercapacitor application 壳聚糖基氧化石墨烯/ WO3复合材料在超级电容器中的应用

4区材料科学

Journal of Ovonic Research Pub Date : 2023-10-01 DOI: 10.15251/jor.2023.195.597

V. Thennarasu, A. Prabakaran

{"title":"Development of chitosan base graphene oxide/ WO3 hybrid composite for supercapacitor application","authors":"V. Thennarasu, A. Prabakaran","doi":"10.15251/jor.2023.195.597","DOIUrl":"https://doi.org/10.15251/jor.2023.195.597","url":null,"abstract":"The use of non-renewable energy has brought to serious environmental problems for the planet. The amount of greenhouse gases rose immediately as the combustion of fossil fuels increased. As a result, sea levels are steadily rising and the Earth is becoming warmer. Research on renewable energy sources has been done extensively to provide a solution. However, in order to maximise energy utilisation, renewable energy needs an energy storage system, such as a super capacitor. For the development of sustainable supercapacitors for future energy systems, electrode material is a prospective target. The formation of desired electrode material is essential in order to fabricate supercapacitor with higher power density and longer life cycle than secondary batteries in electronic application. In this study, chitosan (CS) was isolated from crab shells, and graphene oxide (GO) was synthesized using a modified Hummers' process, followed by a chemical reduction approach. Based on the results, the synthesized GO exhibited higher capacitance as compared to GO that synthesized through single-step modified Hummers’ method. Continuous efforts have been exerted to further improve the electrochemical performance of GO/WO3 nanocomposite by incorporating an optimum content of WO3. In this manner, comprehensive investigations on different parameters, such as loadings of ammonium paratungstate (APT), hydrothermal temperature and reaction time were conducted in order to study the formation of GO/WO3 nanocomposite. WO3 and GO/WO3 nanocomposite were successfully synthesized through a simple hydrothermal method.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136204870","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

Structural and magnetic effect of bismuth substitution on Li-Co ferrite synthesized through microemulsion method 微乳液法合成Li-Co铁氧体的铋取代的结构和磁效应

4区材料科学

Journal of Ovonic Research Pub Date : 2023-10-01 DOI: 10.15251/jor.2023.195.547

A. Saleem, M. S. Shifa, S. A. Buzdar, H. M. N. ul H. K. Asghar, M. Mustaqeem, Z. A. Gilani, S. M. Ali, M. A. Shar, A K. Khan

{"title":"Structural and magnetic effect of bismuth substitution on Li-Co ferrite synthesized through microemulsion method","authors":"A. Saleem, M. S. Shifa, S. A. Buzdar, H. M. N. ul H. K. Asghar, M. Mustaqeem, Z. A. Gilani, S. M. Ali, M. A. Shar, A K. Khan","doi":"10.15251/jor.2023.195.547","DOIUrl":"https://doi.org/10.15251/jor.2023.195.547","url":null,"abstract":"Li-Co spinal ferrites were synthesized in pure and doped form by substituting/doping a post transition metal, bismuth in varying concentrations using micro-emulsion technique. Effect of bismuth substitution was studied by investigating the structural and magnetic properties in detail. X-ray diffractometer results confirmed the creation of single phase along with a slight occurrence of orthophase in prepared ferrites. Average crystallite size increased from 14 to 28 nm by increase in bismuth concentration. SEM micrographs were in complete agreement with XRD results showing spherical to cubic grains which was a confirmation of cubic spinal structure. Average estimated grain size of 52 nm showing agglomeration was also a good testimony of XRD results. VSM technique was employed to study magnetic properties of prepared samples within applied magnetic field strength of -10,000Oe to 10,000Oe. Ms and Hc values were observed to be decreasing with increasing bismuth content. Lower Ms and Hc values made our newly synthesized material fit for transformer cores and induction purposes.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135458775","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

Electronic and optical properties of novel double perovskite compound Cs2RbInI6 新型双钙钛矿化合物Cs2RbInI6的电子光学性质

4区材料科学

Journal of Ovonic Research Pub Date : 2023-10-01 DOI: 10.15251/jor.2023.195.579

Y. Soni, R. Agrawal, V. Yadav, P. Singh, S. Singh, U. Rani, A. S. Verma

引用次数: 0

Defects passivation and H-diffusion controlled by emitter region in polysilicon solar cells submitted to hydrogen plasma 氢等离子体多晶硅太阳能电池的缺陷钝化和h扩散由发射极区控制

4区材料科学

Journal of Ovonic Research Pub Date : 2023-09-20 DOI: 10.15251/jor.2023.195.535

S. Mahdid, D. Belfennache, D. Madi, M. Samah, R. Yekhlef, Y. Benkrima

{"title":"Defects passivation and H-diffusion controlled by emitter region in polysilicon solar cells submitted to hydrogen plasma","authors":"S. Mahdid, D. Belfennache, D. Madi, M. Samah, R. Yekhlef, Y. Benkrima","doi":"10.15251/jor.2023.195.535","DOIUrl":"https://doi.org/10.15251/jor.2023.195.535","url":null,"abstract":"A significant cost reduction in photovoltaic cells could be achieved if they could be made from thin polycrystalline silicon (poly-Si) films. Despite hydrogenation treatments of poly-Si films are necessary to obtain high energy conversion, the role of the n+ emitter on defects passivation via hydrogen diffusion in n+pp+ polysilicon solar cells is not yet understood thoroughly. In this connection, influence of hydrogenation temperature and doping level of the n+ emitter on open-circuit voltage (VOC) were analyzed. It was found that VOC greatly improved by a factor of 2.9 and reached up to 430 mV at a microwave plasma power and hydrogenation temperature of 650 W and 400°C, respectively for a duration of 60 min. Moreover, slow cooling is more advantageous for high VOC compared to the rapid cooling. However, etching of the emitter region was observed, and this degradation is similar for both cooling methods. Furthermore, annealing of the hydrogenated cells in inert gas for 30 min revealed a slight increase in VOC, which reached 40-80 mV, depending on the annealing temperature. These results were explained by hydrogen atoms diffusing into the bulk of the material from subsurface defects that are generated during plasma hydrogenation process. Also, our findings show clearly that VOC values are much higher for a less doped phosphorus emitter compared to that of heavily doped. The origin of these behaviors was clarified in detail.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136375208","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