Pub Date : 2024-05-14DOI: 10.15251/jor.2024.203.295
A. Batool, Z. Hussain, M. I. Din
Phosphate glasses are known for their wide applications in the field of optical fiber, lasers, seals and sensors. Glass system containing (40-x) ZnO-xGa2O3-50P2O5- Na2O, where x=0 to 10mol % were prepared. The effect of gallium oxide on the properties of these glasses were studied. To observe the structure of prepared phosphate glasses FTIR was used under the wavelength range of 400-4000 cm-1 . The prominent peaks appeared in region 400 cm-1 to 2500 cm-1 . The glasses were transparent up to 1500 cm-1 which make them suitable in the field of lasers. The FTIR also confirmed that Q2 structure dominates these glasses.
{"title":"Novel synthesis and spectroscopic analysis of gallium oxide doped zinc phosphate glass","authors":"A. Batool, Z. Hussain, M. I. Din","doi":"10.15251/jor.2024.203.295","DOIUrl":"https://doi.org/10.15251/jor.2024.203.295","url":null,"abstract":"Phosphate glasses are known for their wide applications in the field of optical fiber, lasers, seals and sensors. Glass system containing (40-x) ZnO-xGa2O3-50P2O5- Na2O, where x=0 to 10mol % were prepared. The effect of gallium oxide on the properties of these glasses were studied. To observe the structure of prepared phosphate glasses FTIR was used under the wavelength range of 400-4000 cm-1 . The prominent peaks appeared in region 400 cm-1 to 2500 cm-1 . The glasses were transparent up to 1500 cm-1 which make them suitable in the field of lasers. The FTIR also confirmed that Q2 structure dominates these glasses.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140979447","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}
Pub Date : 2024-05-14DOI: 10.15251/jor.2024.202.245
M. V. Kavitha, C. K. Anjali, K. S. Sudheer
Perovskite solar cells without a hole transport layer have gained popularity due to their stability and affordable manufacturing cost. In this work, device simulation of the solar cell structure is done using SCAPS-1D software with TiO2 as the Electron Transport Layer while toxic-free compound CH3NH3SnBr3 as the absorber material. The efficiency of the structure is found to be 12.63%. The cell performance parameters are investigated by varying individual cell parameters such as absorber layer thickness, absorber layer defect density and doping concentration, ETL thickness, ETL doping concentration, temperature and defect density of the absorber/ETL interface while holding others constant. Simulation with the optimised cell parameter values improves the efficiency to 24.02%.
{"title":"Device simulation and optimization of HTL-free perovskite solar cell with CH3NH3SnBr3 as the absorber layer using solar cell capacitance simulator software","authors":"M. V. Kavitha, C. K. Anjali, K. S. Sudheer","doi":"10.15251/jor.2024.202.245","DOIUrl":"https://doi.org/10.15251/jor.2024.202.245","url":null,"abstract":"Perovskite solar cells without a hole transport layer have gained popularity due to their stability and affordable manufacturing cost. In this work, device simulation of the solar cell structure is done using SCAPS-1D software with TiO2 as the Electron Transport Layer while toxic-free compound CH3NH3SnBr3 as the absorber material. The efficiency of the structure is found to be 12.63%. The cell performance parameters are investigated by varying individual cell parameters such as absorber layer thickness, absorber layer defect density and doping concentration, ETL thickness, ETL doping concentration, temperature and defect density of the absorber/ETL interface while holding others constant. Simulation with the optimised cell parameter values improves the efficiency to 24.02%.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140981759","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}
Pub Date : 2024-05-14DOI: 10.15251/jor.2024.202.255
M. S. Sada, R. I. Jasim, A. M. Saleh, K. N. Hussein, N. Habubi, S. Chiad
On glass substrates, silver (Ag) doped Titanium dioxide (TiO2) films at varied levels of concentrations (0, 2, and 4) % wt were synthesized by chemical spray pyrolysis (CSP). As per the X-ray diffraction pattern, the only phases present in the sample were anatase and rutile TiO2. Using AFM, it was discovered that the TiO2 thin films were smooth and compact; however, the surface roughness increases as the dopant amount decreases. SEM images display TiO2 films. Surface transformation is evident with uniform spherical nanograins after Ag doping. The optical characteristics of wavelength range (300-900) nm have been investigated using absorbance and transmittance spectra. The results revealed that the films have a 65-75 % transmittance in VIS-NIR spectra for all films. The allowable direct electronic transitions have (3.15-3.25) eV energy gaps. At 250 ppm, the NH3 gas sensor exhibited increased resistance, indicating heightened sensitivity. Sensitivity decreases with concentration increases to 0 %, 2 %, and 4 % of Ag for NH3 gas. Reduction observed: 18.4% to 4.6% (50 ppm), 20.7% to 6.8% (150 ppm), and 25.9% to 8.2% (250 ppm).
{"title":"Physical and sensing characterization of nanostructured Ag doped TiO2 thin films","authors":"M. S. Sada, R. I. Jasim, A. M. Saleh, K. N. Hussein, N. Habubi, S. Chiad","doi":"10.15251/jor.2024.202.255","DOIUrl":"https://doi.org/10.15251/jor.2024.202.255","url":null,"abstract":"On glass substrates, silver (Ag) doped Titanium dioxide (TiO2) films at varied levels of concentrations (0, 2, and 4) % wt were synthesized by chemical spray pyrolysis (CSP). As per the X-ray diffraction pattern, the only phases present in the sample were anatase and rutile TiO2. Using AFM, it was discovered that the TiO2 thin films were smooth and compact; however, the surface roughness increases as the dopant amount decreases. SEM images display TiO2 films. Surface transformation is evident with uniform spherical nanograins after Ag doping. The optical characteristics of wavelength range (300-900) nm have been investigated using absorbance and transmittance spectra. The results revealed that the films have a 65-75 % transmittance in VIS-NIR spectra for all films. The allowable direct electronic transitions have (3.15-3.25) eV energy gaps. At 250 ppm, the NH3 gas sensor exhibited increased resistance, indicating heightened sensitivity. Sensitivity decreases with concentration increases to 0 %, 2 %, and 4 % of Ag for NH3 gas. Reduction observed: 18.4% to 4.6% (50 ppm), 20.7% to 6.8% (150 ppm), and 25.9% to 8.2% (250 ppm).","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140980892","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}
Pub Date : 2024-05-14DOI: 10.15251/jor.2024.202.267
M. Sudha, A.B. Madhan, E. Geetha, R. Satheeskumar
The economic spray pyrolysis process were used to prepare Zinc oxide thin films. Ahigh - quality thin film is obtained by optimizing factors that include concentration, flow rate, nozzle to substrate distance. The temperature is differed between 350˚C to 450˚C. The structural and optical qualities were studied through physical investigation. According to XRD, the films have a hexagonal crystal structure. A scanning electron microscope reveals the material’s uniform deposition &adhesion across a glass substrate. A direct band gap of about 2.4 to 2.6 eV was obtained for different temperatures.
{"title":"Synthesis of zinc oxide thin films by spray pyrolysis technique","authors":"M. Sudha, A.B. Madhan, E. Geetha, R. Satheeskumar","doi":"10.15251/jor.2024.202.267","DOIUrl":"https://doi.org/10.15251/jor.2024.202.267","url":null,"abstract":"The economic spray pyrolysis process were used to prepare Zinc oxide thin films. Ahigh - quality thin film is obtained by optimizing factors that include concentration, flow rate, nozzle to substrate distance. The temperature is differed between 350˚C to 450˚C. The structural and optical qualities were studied through physical investigation. According to XRD, the films have a hexagonal crystal structure. A scanning electron microscope reveals the material’s uniform deposition &adhesion across a glass substrate. A direct band gap of about 2.4 to 2.6 eV was obtained for different temperatures.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140979622","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}
Pub Date : 2024-05-14DOI: 10.15251/jor.2024.203.285
M. Damoom, A. Alhawsawi, E. Banoqitah, E. B. Moustafa, O. H. Sallam, A. H. Hammad
Sodium diborate glasses containing cadmium and lead oxides were fabricated by the melt annealing technique. Lead oxide was introduced at the expense of cadmium oxide to enhance its elastic and shielding properties. The density of the lead-free glass increased from 2.137 g/cm3 to 3.330 g/cm3 after replacing cadmium oxide with lead oxide. The density values were used to investigate the elastic properties of glass using the MakishimaMackenzie model. In addition, the Phy-X/PSD code was used to simulate the shielding properties of such glasses at different photon energies ranging from 0.005 to 15 MeV.
{"title":"Simulation of sodium diborate glass containing lead and cadmium oxides for radiation shielding applications","authors":"M. Damoom, A. Alhawsawi, E. Banoqitah, E. B. Moustafa, O. H. Sallam, A. H. Hammad","doi":"10.15251/jor.2024.203.285","DOIUrl":"https://doi.org/10.15251/jor.2024.203.285","url":null,"abstract":"Sodium diborate glasses containing cadmium and lead oxides were fabricated by the melt annealing technique. Lead oxide was introduced at the expense of cadmium oxide to enhance its elastic and shielding properties. The density of the lead-free glass increased from 2.137 g/cm3 to 3.330 g/cm3 after replacing cadmium oxide with lead oxide. The density values were used to investigate the elastic properties of glass using the MakishimaMackenzie model. In addition, the Phy-X/PSD code was used to simulate the shielding properties of such glasses at different photon energies ranging from 0.005 to 15 MeV.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140977988","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}
Pub Date : 2024-05-14DOI: 10.15251/jor.2024.203.273
Y. Hordieiev, A. Zaichuk
The influence of composition on the structure, thermal, and some physical characteristics of bismuth borate glasses, formulated as 55Bi2O3–(35-x-y)B2O3–(5+x)ZnO–(5+y)SiO2 (where 0 ≤ x, y ≤ 15 mol%), was investigated. Comprehensive analyses were conducted using techniques such as X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier-Transform Infrared Spectroscopy (FTIR), Differential Thermal Analysis (DTA), and Dilatometry. XRD confirmed the amorphous nature of the glass samples, while FTIR spectroscopy revealed that the glasses are primarily composed of BO4, BO3, BiO6, BiO3, ZnO4, and SiO4 structural units. DTA provided further evidence of the samples' glassy state and insights into key temperatures like glass transition (Tg), crystallization (Tc), and melting (Tm). The study finds that substituting B2O3 with SiO2 increases all characteristic temperatures, whereas replacing it with ZnO decreases Tg and Tc but increases Tm. The maximum thermal stability, indicated by a ΔT of 99°C, was observed in the glass with a 55Bi2O3–20B2O3–20ZnO–5SiO2 composition. Dilatometric measurements showed that the investigated glasses have a high coefficient of thermal expansion (10.0–10.7 ppm/°C) values, a low glass transition temperature (345–376°C), and a low dilatometric softening temperature (364–392°C). Additionally, the density and molar volume of the samples were accurately determined.
{"title":"Effects of composition on the structure, thermal and some physical characteristics of Bi2O3-B2O3-ZnO-SiO2 glasse","authors":"Y. Hordieiev, A. Zaichuk","doi":"10.15251/jor.2024.203.273","DOIUrl":"https://doi.org/10.15251/jor.2024.203.273","url":null,"abstract":"The influence of composition on the structure, thermal, and some physical characteristics of bismuth borate glasses, formulated as 55Bi2O3–(35-x-y)B2O3–(5+x)ZnO–(5+y)SiO2 (where 0 ≤ x, y ≤ 15 mol%), was investigated. Comprehensive analyses were conducted using techniques such as X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), Fourier-Transform Infrared Spectroscopy (FTIR), Differential Thermal Analysis (DTA), and Dilatometry. XRD confirmed the amorphous nature of the glass samples, while FTIR spectroscopy revealed that the glasses are primarily composed of BO4, BO3, BiO6, BiO3, ZnO4, and SiO4 structural units. DTA provided further evidence of the samples' glassy state and insights into key temperatures like glass transition (Tg), crystallization (Tc), and melting (Tm). The study finds that substituting B2O3 with SiO2 increases all characteristic temperatures, whereas replacing it with ZnO decreases Tg and Tc but increases Tm. The maximum thermal stability, indicated by a ΔT of 99°C, was observed in the glass with a 55Bi2O3–20B2O3–20ZnO–5SiO2 composition. Dilatometric measurements showed that the investigated glasses have a high coefficient of thermal expansion (10.0–10.7 ppm/°C) values, a low glass transition temperature (345–376°C), and a low dilatometric softening temperature (364–392°C). Additionally, the density and molar volume of the samples were accurately determined.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140978489","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}
This study investigates the effectiveness of plasmonic improvement on photonic absorber properties of capped SiO2 and TiO2 nanoparticle in thin film a-Si photovoltaic cell. It also examines their J-V properties when exposed to sunlight. The modified Stober approach was used for irradiation tests, revealing lower reflectivity in different doses with SiO2 1st dose:0.485mg/ml, SiO2 2nd dose:0.693mg/ml, and TiO2 1st dose:0.525 mg/ml, TiO2 2nd dose:0.748 mg/ml solutions. Silica-based solar cells showed a 2.45% efficiency improvement, while titania-based solar cells improved efficiency by 0.657% compared with the uncoated sample.
{"title":"Comparative study on capped SiO2 and TiO2 to improve efficiency in plasmonic solar cell through modified synthesis approach","authors":"P. Sarkar, S. Panda, B. Maji, A. K. Mukhopadhyay","doi":"10.15251/jor.2024.201.1","DOIUrl":"https://doi.org/10.15251/jor.2024.201.1","url":null,"abstract":"This study investigates the effectiveness of plasmonic improvement on photonic absorber properties of capped SiO2 and TiO2 nanoparticle in thin film a-Si photovoltaic cell. It also examines their J-V properties when exposed to sunlight. The modified Stober approach was used for irradiation tests, revealing lower reflectivity in different doses with SiO2 1st dose:0.485mg/ml, SiO2 2nd dose:0.693mg/ml, and TiO2 1st dose:0.525 mg/ml, TiO2 2nd dose:0.748 mg/ml solutions. Silica-based solar cells showed a 2.45% efficiency improvement, while titania-based solar cells improved efficiency by 0.657% compared with the uncoated sample.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140521791","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}
Pub Date : 2024-01-01DOI: 10.15251/jor.2024.201.45
R. Ouldamer, D. Belfennache, D. Madi, R. Yekhlef, S. Zaiou, Mohamed A. Ali
Doping level of the n+ emitter region is an essential parameter that controls the performance of the n+ pp+ poly-silicon solar cells. Also, most poly-silicon n+ pp+ solar cell manufacturers apply hydrogenation from the phosphorus emitter n+ side to improve photovoltaic efficiency. Although hydrogen can passivate defects as well as it changes initial phosphorus doping level through phosphorus-hydrogen complex formation. Consequently, phosphorus deactivation can have a harmful effect on photovoltaic efficiency. In this context, the primary purpose of this work is to investigate the phosphorus deactivation in n+ emitter region and its effect on defects passivation of hydrogenated n+ pp+ poly-silicon solar cells. To do this, hydrogenation is performed by microwave plasma discharge involving an electron cyclotron resonance system. Besides, hydrogen passivates defects in poly-silicon, at the same time it deactivates phosphorus. For this reason, we have chosen to separate these simultaneous effects. So, we performed phosphorus deactivation on Schottky diodes-based mono-silicon, while defect passivation was operated in n+ pp+ poly-silicon solar cells. Our results reveal that hydrogen effectively deactivates phosphorus dopant. This effect is deeper in Schottky diodes with low initial phosphorus doping level where hydrogen diffuses easily in the bulk. This behavior is clearly revealed in open circuit-voltage values (Voc) measured on n+ pp+ samples. In fact, solar cells with low phosphorus concentration in n+ region revealed 319 mV compared to 230 mV for high doping level. Also, all n+ pp+ poly-silicon solar cells show a saturation of Voc at high microwave plasma power. Reasons for such case were explained and discussed in detail.
{"title":"Phosphorus deactivation mechanisms by hydrogenation in the n+ emitter region and its effect on defects passivation in n+pp+ poly-silicon solar cells","authors":"R. Ouldamer, D. Belfennache, D. Madi, R. Yekhlef, S. Zaiou, Mohamed A. Ali","doi":"10.15251/jor.2024.201.45","DOIUrl":"https://doi.org/10.15251/jor.2024.201.45","url":null,"abstract":"Doping level of the n+ emitter region is an essential parameter that controls the performance of the n+ pp+ poly-silicon solar cells. Also, most poly-silicon n+ pp+ solar cell manufacturers apply hydrogenation from the phosphorus emitter n+ side to improve photovoltaic efficiency. Although hydrogen can passivate defects as well as it changes initial phosphorus doping level through phosphorus-hydrogen complex formation. Consequently, phosphorus deactivation can have a harmful effect on photovoltaic efficiency. In this context, the primary purpose of this work is to investigate the phosphorus deactivation in n+ emitter region and its effect on defects passivation of hydrogenated n+ pp+ poly-silicon solar cells. To do this, hydrogenation is performed by microwave plasma discharge involving an electron cyclotron resonance system. Besides, hydrogen passivates defects in poly-silicon, at the same time it deactivates phosphorus. For this reason, we have chosen to separate these simultaneous effects. So, we performed phosphorus deactivation on Schottky diodes-based mono-silicon, while defect passivation was operated in n+ pp+ poly-silicon solar cells. Our results reveal that hydrogen effectively deactivates phosphorus dopant. This effect is deeper in Schottky diodes with low initial phosphorus doping level where hydrogen diffuses easily in the bulk. This behavior is clearly revealed in open circuit-voltage values (Voc) measured on n+ pp+ samples. In fact, solar cells with low phosphorus concentration in n+ region revealed 319 mV compared to 230 mV for high doping level. Also, all n+ pp+ poly-silicon solar cells show a saturation of Voc at high microwave plasma power. Reasons for such case were explained and discussed in detail.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140522507","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}
Pub Date : 2024-01-01DOI: 10.15251/jor.2024.201.35
S. Saseetha, M. Nagarajan, S. Subha, K. A. Rani, S. C. Vella Durai
Pure Lanthanum Ferrite (LaFeO3) nanoparticles and Lanthanum Magnesium Ferrite (LaMgxFe1-xO3) nanocomposites have been prepared by the sol-gel auto-combustion method. The structural and morphological properties were investigated by X-ray diffraction (XRD), Scanning electron microscopy (SEM) and energy dispersive X-ray (EDAX) spectroscopy. Powder XRD studies revealed that the samples are pure orthorhombic perovskite crystals with a size of around 20–50 nm. The FT-IR spectra of pure and composites was confirmed the formation perovskite structure. It has been discovered that composites material functions as an electrode in supercapacitors after its electrical characteristics have been examined by galvanostatic charging and discharging (GCD), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) with a 2 M KOH electrolyte.
采用溶胶-凝胶自燃烧法制备了纯镧铁氧体（LaFeO3）纳米粒子和镧镁铁氧体（LaMgxFe1-xO3）纳米复合材料。通过 X 射线衍射（XRD）、扫描电子显微镜（SEM）和能量色散 X 射线（EDAX）光谱对其结构和形态特性进行了研究。粉末 X 射线衍射研究表明，样品是纯正的正交闪长岩晶体，大小约为 20-50 纳米。纯样品和复合材料的傅立叶变换红外光谱证实了包晶结构的形成。通过在 2 M KOH 电解液中进行电静态充放电 (GCD)、循环伏安 (CV) 和电化学阻抗谱 (EIS) 测试，发现复合材料可用作超级电容器的电极。
{"title":"Investigation of alkaline earth element substituted Lanthanum Ferrite nanoparticles and it’s characterization","authors":"S. Saseetha, M. Nagarajan, S. Subha, K. A. Rani, S. C. Vella Durai","doi":"10.15251/jor.2024.201.35","DOIUrl":"https://doi.org/10.15251/jor.2024.201.35","url":null,"abstract":"Pure Lanthanum Ferrite (LaFeO3) nanoparticles and Lanthanum Magnesium Ferrite (LaMgxFe1-xO3) nanocomposites have been prepared by the sol-gel auto-combustion method. The structural and morphological properties were investigated by X-ray diffraction (XRD), Scanning electron microscopy (SEM) and energy dispersive X-ray (EDAX) spectroscopy. Powder XRD studies revealed that the samples are pure orthorhombic perovskite crystals with a size of around 20–50 nm. The FT-IR spectra of pure and composites was confirmed the formation perovskite structure. It has been discovered that composites material functions as an electrode in supercapacitors after its electrical characteristics have been examined by galvanostatic charging and discharging (GCD), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) with a 2 M KOH electrolyte.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140522194","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}
Pub Date : 2024-01-01DOI: 10.15251/jor.2024.201.21
M. Husenzoda, L. Gahramanli
The methods for forming hybrid organo-inorganic perovskite structures in the form of thin films and their stability are studied. The molecular-dynamics (MD) simulation approach was used to conduct theoretical analyses of materials based on the hybrid organo-inorganic perovskites MAPbX3. The classical perovskite structures based on CaTiO3 are considered the basic structure to refine the methodology of computer simulation and optimize the shape and parameters of the interaction of atomic potentials. Series of MD calculations with various model concepts, and models of flexible and rigid coupling of perovskites, the heating process's influence on the structure has been analyzed in a wide range.
{"title":"Molecular-dynamics modeling of structural stability of MAPbX3 (X=I-, CL-, BR-) as solar cells elements","authors":"M. Husenzoda, L. Gahramanli","doi":"10.15251/jor.2024.201.21","DOIUrl":"https://doi.org/10.15251/jor.2024.201.21","url":null,"abstract":"The methods for forming hybrid organo-inorganic perovskite structures in the form of thin films and their stability are studied. The molecular-dynamics (MD) simulation approach was used to conduct theoretical analyses of materials based on the hybrid organo-inorganic perovskites MAPbX3. The classical perovskite structures based on CaTiO3 are considered the basic structure to refine the methodology of computer simulation and optimize the shape and parameters of the interaction of atomic potentials. Series of MD calculations with various model concepts, and models of flexible and rigid coupling of perovskites, the heating process's influence on the structure has been analyzed in a wide range.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140517995","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}
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