Pub Date : 2023-04-20DOI: 10.1080/01411594.2023.2200946
S. J. J. Kay, N. Chidhambaram
ABSTRACT Herein, we report the phase evolution of perovskite-type copper zirconate nanoparticles synthesized via the coprecipitation method. The XRD investigations confirm the dominant orthorhombic CuZrO3 phase formation at 700 °C along with frail tetragonal ZrO2 and monoclinic CuO phases. XRD analysis confirms the presence of orthorhombic perovskite type CuZrO3 in the sample annealed at 700 °C with cell parameters: a = 6.4552 Å, b = 7.4008 Å, and c = 8.4013 Å whose crystallite sizes is 54 nm. Higher calcination temperatures (above 700 °C) induce the crystallinity deterioration in the CuZrO3 phase. The XPS studies substantiate the chemical state of constituent elements present in the sample annealed at 700 °C. The chemical bonding and optical features of the samples were probed using FTIR and UV-Vis-NIR spectroscopy, respectively. The optical bandgap energies for the synthesized samples that were annealed at various temperatures ranged from 3.36–3.08 eV.
摘要本文报道了通过共沉淀法合成的钙钛矿型锆酸铜纳米颗粒的相演变。XRD研究证实，在700°C下，主要的正交CuZrO3相以及脆弱的四方ZrO2和单斜CuO相形成。XRD分析证实，在700°C退火的样品中存在正交钙钛矿型CuZrO3，电池参数为：a = 6.4552Å, b = 7.4008Å, 和c = 8.4013Å 其晶粒尺寸为54nm。较高的煅烧温度（高于700°C）会导致CuZrO3相中的结晶度下降。XPS研究证实了在700°C退火的样品中存在的组成元素的化学状态。分别使用FTIR和UV-Vis-NIR光谱对样品的化学键合和光学特性进行了探测。在不同温度下退火的合成样品的光学带隙能量范围为3.36–3.08eV。
{"title":"Temperature-mediated phase evolution of perovskite-type CuZrO3 nanoparticles","authors":"S. J. J. Kay, N. Chidhambaram","doi":"10.1080/01411594.2023.2200946","DOIUrl":"https://doi.org/10.1080/01411594.2023.2200946","url":null,"abstract":"ABSTRACT Herein, we report the phase evolution of perovskite-type copper zirconate nanoparticles synthesized via the coprecipitation method. The XRD investigations confirm the dominant orthorhombic CuZrO3 phase formation at 700 °C along with frail tetragonal ZrO2 and monoclinic CuO phases. XRD analysis confirms the presence of orthorhombic perovskite type CuZrO3 in the sample annealed at 700 °C with cell parameters: a = 6.4552 Å, b = 7.4008 Å, and c = 8.4013 Å whose crystallite sizes is 54 nm. Higher calcination temperatures (above 700 °C) induce the crystallinity deterioration in the CuZrO3 phase. The XPS studies substantiate the chemical state of constituent elements present in the sample annealed at 700 °C. The chemical bonding and optical features of the samples were probed using FTIR and UV-Vis-NIR spectroscopy, respectively. The optical bandgap energies for the synthesized samples that were annealed at various temperatures ranged from 3.36–3.08 eV.","PeriodicalId":19881,"journal":{"name":"Phase Transitions","volume":"96 1","pages":"424 - 433"},"PeriodicalIF":1.6,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43474299","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 : 2023-04-20DOI: 10.1080/01411594.2023.2202322
O. El Harafi, H. Lassri, N. Mliki, R. Moubah
ABSTRACT The structural and optical properties of BiI3 and PbI2 powders were compared. The x-ray diffraction results confirm that PbI2 crystallizes in a hexagonal structure, while BiI3 in a rhombohedral structure. The optical band gap Eg was found to be direct at (2.31 eV) for PbI2 and indirect (1.7 eV) for BiI3. Different fundamental optical properties such as refractive index, real and imaginary parts of optical conductivities, dielectric function, and linear susceptibility were determined. The non-linear optical properties were also discussed by deriving the linear and non-linear susceptibilities using Wemple–DiDomenico single-oscillator model. The third-order susceptibility at low absorption region was found to be equal 2.684×10−15 [esu] and 3.685×10−15 [esu], as well as the non-linear refractive index n2, 7.5×10−14 [esu] and 1.07×10−13 [esu] for BiI3 and PbI2 respectively, which evidences their interest in optoelectronic devices.
{"title":"Comparative studies of the structural and optical properties of BiI3 and PbI2 iodide-based semiconductors","authors":"O. El Harafi, H. Lassri, N. Mliki, R. Moubah","doi":"10.1080/01411594.2023.2202322","DOIUrl":"https://doi.org/10.1080/01411594.2023.2202322","url":null,"abstract":"ABSTRACT The structural and optical properties of BiI3 and PbI2 powders were compared. The x-ray diffraction results confirm that PbI2 crystallizes in a hexagonal structure, while BiI3 in a rhombohedral structure. The optical band gap Eg was found to be direct at (2.31 eV) for PbI2 and indirect (1.7 eV) for BiI3. Different fundamental optical properties such as refractive index, real and imaginary parts of optical conductivities, dielectric function, and linear susceptibility were determined. The non-linear optical properties were also discussed by deriving the linear and non-linear susceptibilities using Wemple–DiDomenico single-oscillator model. The third-order susceptibility at low absorption region was found to be equal 2.684×10−15 [esu] and 3.685×10−15 [esu], as well as the non-linear refractive index n2, 7.5×10−14 [esu] and 1.07×10−13 [esu] for BiI3 and PbI2 respectively, which evidences their interest in optoelectronic devices.","PeriodicalId":19881,"journal":{"name":"Phase Transitions","volume":"96 1","pages":"413 - 423"},"PeriodicalIF":1.6,"publicationDate":"2023-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47421514","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 : 2023-04-13DOI: 10.1080/01411594.2023.2198128
P. Mohanty
ABSTRACT is a new member of the corundum-type family. Its crystal structure is trigonal with space group . and ions share the A-site with fifty-fifty occupancy. In , exhibits a 2 + oxidation state, whereas shows a reduction in the charge state from 5 + to 4 + due to the presence of vacancy-trapped electrons in dimmer. The conductivity spectra analysis in view of various transport models states that overlapping large polaron tunneling is the predominant transport process (polaron radius 10.65 Å) in the low-temperature range (303-473 K), while for the high-temperature range (573-673 K), the conduction is intrinsic, and the carriers are primarily small polarons. The proximity between optical bandgap (∼1.60 eV) and conduction activation energy (1.64 eV) is due to the formation of intermediate energy bands near the Fermi level and their participation in high-temperature intrinsic conduction.
{"title":"Structural, elemental, and electrical conduction properties of corundum-type Mg2Co2Nb2O9","authors":"P. Mohanty","doi":"10.1080/01411594.2023.2198128","DOIUrl":"https://doi.org/10.1080/01411594.2023.2198128","url":null,"abstract":"ABSTRACT is a new member of the corundum-type family. Its crystal structure is trigonal with space group . and ions share the A-site with fifty-fifty occupancy. In , exhibits a 2 + oxidation state, whereas shows a reduction in the charge state from 5 + to 4 + due to the presence of vacancy-trapped electrons in dimmer. The conductivity spectra analysis in view of various transport models states that overlapping large polaron tunneling is the predominant transport process (polaron radius 10.65 Å) in the low-temperature range (303-473 K), while for the high-temperature range (573-673 K), the conduction is intrinsic, and the carriers are primarily small polarons. The proximity between optical bandgap (∼1.60 eV) and conduction activation energy (1.64 eV) is due to the formation of intermediate energy bands near the Fermi level and their participation in high-temperature intrinsic conduction.","PeriodicalId":19881,"journal":{"name":"Phase Transitions","volume":"96 1","pages":"400 - 412"},"PeriodicalIF":1.6,"publicationDate":"2023-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43594709","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 : 2023-04-08DOI: 10.1080/01411594.2023.2191847
M. Abu-Jafar, Raed T. Jaradat, Mahmoud Farout, Areej Shawahneh, Ahmad A. Mousa, Khalid Ilaiwi, R. Khenata, Said M. Azar
ABSTRACT The structural parameters, electronic, optical, and elastic properties of Niobium Carbide (NbC) compound within four different structures: rock-salt (RS), wurtzite (WZ), cesium chloride (CsCl), and Nickel Arsenide (NiAs) are examined using the Full-Potential Linearized-Augmented Plane Wave (FP-LAPW). The exchange–correlation potential (VXC) has been treated by Perdew, Burke, and Ernzerhof's generalized gradient approximation (PBE-GGA) when structural properties, transition pressure, and elastic properties are estimated. For electronic properties, in addition to (PBE-GGA), the modified Becke–Johnson (mBJ-GGA) was used for increased accuracy. Present results show that the RS of NbC is the most stable among the four examined structures with the lowest equilibrium energy. The calculated lattice constants are in good agreement with the former calculations. The elasticity and the formation energy calculations show that NbC is stable within the four studied structures. The electronic band structure calculations of NbC show that it has a metallic nature in the four considered structures.
{"title":"Insight into the structural, electronic, optical, and elastic properties of niobium carbide","authors":"M. Abu-Jafar, Raed T. Jaradat, Mahmoud Farout, Areej Shawahneh, Ahmad A. Mousa, Khalid Ilaiwi, R. Khenata, Said M. Azar","doi":"10.1080/01411594.2023.2191847","DOIUrl":"https://doi.org/10.1080/01411594.2023.2191847","url":null,"abstract":"ABSTRACT The structural parameters, electronic, optical, and elastic properties of Niobium Carbide (NbC) compound within four different structures: rock-salt (RS), wurtzite (WZ), cesium chloride (CsCl), and Nickel Arsenide (NiAs) are examined using the Full-Potential Linearized-Augmented Plane Wave (FP-LAPW). The exchange–correlation potential (VXC) has been treated by Perdew, Burke, and Ernzerhof's generalized gradient approximation (PBE-GGA) when structural properties, transition pressure, and elastic properties are estimated. For electronic properties, in addition to (PBE-GGA), the modified Becke–Johnson (mBJ-GGA) was used for increased accuracy. Present results show that the RS of NbC is the most stable among the four examined structures with the lowest equilibrium energy. The calculated lattice constants are in good agreement with the former calculations. The elasticity and the formation energy calculations show that NbC is stable within the four studied structures. The electronic band structure calculations of NbC show that it has a metallic nature in the four considered structures.","PeriodicalId":19881,"journal":{"name":"Phase Transitions","volume":"96 1","pages":"337 - 349"},"PeriodicalIF":1.6,"publicationDate":"2023-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47054653","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 : 2023-03-18DOI: 10.1080/01411594.2023.2189113
B. Olofinjana, T. G. Fabunmi, F. O. Efe, O. Fasakin, A. C. Adebisi, M. Eleruja, O. O. Akinwunmi, E. Ajayi
ABSTRACT Deposition technique and associated deposition parameters play significant roles in determining the stoichiometry of thin films, and consequently, their properties. Herein, Cu-S thin films were deposited on a sodalime glass substrate via metal organic chemical vapour deposition (MOCVD) at temperatures between 350 and 450°C using a single solid source precursor. The deposited Cu-S films were characterized using Rutherford backscattering spectroscopy (RBS), X-ray diffraction (XRD), scanning electron microscopy (SEM), UV–visible spectrophotometry, and four-point probe technique. RBS characterization revealed that the films are non-stoichiometry while thickness increased from 480 to 655 nm as deposition temperature increased. SEM revealed micrographs that are temperature-dependent. A direct band gap value between 2.75 and 3.80 eV was obtained as the deposition temperature increased. Electrical characterization showed ohmic characteristics in which, resistivity decreased from 18.50 × 10−3 Ωcm to 8.20 × 10−3 Ωcm as deposition temperature increased.
{"title":"Deposition of stoichiometry – tailored amorphous Cu-S thin films by MOCVD technique","authors":"B. Olofinjana, T. G. Fabunmi, F. O. Efe, O. Fasakin, A. C. Adebisi, M. Eleruja, O. O. Akinwunmi, E. Ajayi","doi":"10.1080/01411594.2023.2189113","DOIUrl":"https://doi.org/10.1080/01411594.2023.2189113","url":null,"abstract":"ABSTRACT Deposition technique and associated deposition parameters play significant roles in determining the stoichiometry of thin films, and consequently, their properties. Herein, Cu-S thin films were deposited on a sodalime glass substrate via metal organic chemical vapour deposition (MOCVD) at temperatures between 350 and 450°C using a single solid source precursor. The deposited Cu-S films were characterized using Rutherford backscattering spectroscopy (RBS), X-ray diffraction (XRD), scanning electron microscopy (SEM), UV–visible spectrophotometry, and four-point probe technique. RBS characterization revealed that the films are non-stoichiometry while thickness increased from 480 to 655 nm as deposition temperature increased. SEM revealed micrographs that are temperature-dependent. A direct band gap value between 2.75 and 3.80 eV was obtained as the deposition temperature increased. Electrical characterization showed ohmic characteristics in which, resistivity decreased from 18.50 × 10−3 Ωcm to 8.20 × 10−3 Ωcm as deposition temperature increased.","PeriodicalId":19881,"journal":{"name":"Phase Transitions","volume":"96 1","pages":"361 - 373"},"PeriodicalIF":1.6,"publicationDate":"2023-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49439668","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 : 2023-03-15DOI: 10.1080/01411594.2023.2184361
Moly M. Rose, R. S. Christy, T. A. Benitta, J. T. Thanka Kumaran
ABSTRACT The NiS nanoparticles were synthesised by the microwave-assisted chemical precipitation method. The XRD pattern shows that the prepared NiS nanoparticles have an orthorhombic structure. The SEM image of NiS nanoparticles confirms the nanostructure. The energy-dispersive X-ray analysis confirms the existence of Nickel and Sulphur in a proper ratio. The D.C. electrical resistances were measured in the temperature range 300 K–500 K. Oscillations were found in the temperature resistance curve of Nickel Sulphide nanoparticles on repeated heating and cooling due to phase transition. The XRD pattern of the powdered form of the NiS pellet used for the resistance measurement also confirms this phase transition. The two forms of UV and PL spectra of NiS nanoparticles were studied.
{"title":"Phase transition in nickel sulphide nanoparticles","authors":"Moly M. Rose, R. S. Christy, T. A. Benitta, J. T. Thanka Kumaran","doi":"10.1080/01411594.2023.2184361","DOIUrl":"https://doi.org/10.1080/01411594.2023.2184361","url":null,"abstract":"ABSTRACT The NiS nanoparticles were synthesised by the microwave-assisted chemical precipitation method. The XRD pattern shows that the prepared NiS nanoparticles have an orthorhombic structure. The SEM image of NiS nanoparticles confirms the nanostructure. The energy-dispersive X-ray analysis confirms the existence of Nickel and Sulphur in a proper ratio. The D.C. electrical resistances were measured in the temperature range 300 K–500 K. Oscillations were found in the temperature resistance curve of Nickel Sulphide nanoparticles on repeated heating and cooling due to phase transition. The XRD pattern of the powdered form of the NiS pellet used for the resistance measurement also confirms this phase transition. The two forms of UV and PL spectra of NiS nanoparticles were studied.","PeriodicalId":19881,"journal":{"name":"Phase Transitions","volume":"96 1","pages":"301 - 310"},"PeriodicalIF":1.6,"publicationDate":"2023-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48562035","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 : 2023-03-14DOI: 10.1080/01411594.2023.2186231
Reena Gadhwal, Hukum Singh, A. Devi
ABSTRACT We have investigated the preparation and nonlinear optical characterization of Ge20Te75Bi5 (GTB) nano colloidal solutions using the z-scan technique for three different concentrations. The transmission spectra of GTB nano colloid films have been investigated. FTIR spectra have been measured to confirm the presence of amines in nano colloidal solutions. Z-scan traces at 78 × 1012 W/cm2 laser intensity were used to study the nonlinearity of the samples. The nonlinear absorption coefficient increases with an increase in the concentration of nano colloids. The reported high nonlinear response is useful for optical limiting applications. The optical limiting behavior is also studied against different concentrations.
{"title":"Concentration-dependent enhancement of nonlinear optical properties in Ge-Te-Bi nano colloidal solutions","authors":"Reena Gadhwal, Hukum Singh, A. Devi","doi":"10.1080/01411594.2023.2186231","DOIUrl":"https://doi.org/10.1080/01411594.2023.2186231","url":null,"abstract":"ABSTRACT We have investigated the preparation and nonlinear optical characterization of Ge20Te75Bi5 (GTB) nano colloidal solutions using the z-scan technique for three different concentrations. The transmission spectra of GTB nano colloid films have been investigated. FTIR spectra have been measured to confirm the presence of amines in nano colloidal solutions. Z-scan traces at 78 × 1012 W/cm2 laser intensity were used to study the nonlinearity of the samples. The nonlinear absorption coefficient increases with an increase in the concentration of nano colloids. The reported high nonlinear response is useful for optical limiting applications. The optical limiting behavior is also studied against different concentrations.","PeriodicalId":19881,"journal":{"name":"Phase Transitions","volume":"96 1","pages":"374 - 382"},"PeriodicalIF":1.6,"publicationDate":"2023-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45749138","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 : 2023-03-14DOI: 10.1080/01411594.2023.2185521
Jun-hui Peng, E. Tikhonov
ABSTRACT The high-pressure structures of the Bi–Te system were theoretically predicted by this work, which also clarified some ambiguous structures. Using variable-composition evolutionary algorithms, the crystal structures of the Bi–Te system at high pressures were searched, and one new stable structure BiTe-P-1 was proposed. BiTe-P-1 was discovered to be the experiment's undetected structure by comparing with the experimental XRD. Thereafter, the pressure-composition diagram of the Bi–Te system was calculated using the first-principles method. In contrast to previous reports, Bi2Te3 only had two high-pressure structures, R-3m and C2/m, and it would decompose into BiTe and Te at 13.4 GPa. The calculation of quasi-harmonic approximation shown that the BCC alloy phase of Bi2Te3 only could exist stably under high temperature and high pressure. For BiTe, The phase transition route was P-3m1 → P-1 → Pm-3m, and the transition pressure was 7.5 and 11.2 GPa, respectively.
{"title":"Predicted bismuth–tellurium under high pressures","authors":"Jun-hui Peng, E. Tikhonov","doi":"10.1080/01411594.2023.2185521","DOIUrl":"https://doi.org/10.1080/01411594.2023.2185521","url":null,"abstract":"ABSTRACT The high-pressure structures of the Bi–Te system were theoretically predicted by this work, which also clarified some ambiguous structures. Using variable-composition evolutionary algorithms, the crystal structures of the Bi–Te system at high pressures were searched, and one new stable structure BiTe-P-1 was proposed. BiTe-P-1 was discovered to be the experiment's undetected structure by comparing with the experimental XRD. Thereafter, the pressure-composition diagram of the Bi–Te system was calculated using the first-principles method. In contrast to previous reports, Bi2Te3 only had two high-pressure structures, R-3m and C2/m, and it would decompose into BiTe and Te at 13.4 GPa. The calculation of quasi-harmonic approximation shown that the BCC alloy phase of Bi2Te3 only could exist stably under high temperature and high pressure. For BiTe, The phase transition route was P-3m1 → P-1 → Pm-3m, and the transition pressure was 7.5 and 11.2 GPa, respectively.","PeriodicalId":19881,"journal":{"name":"Phase Transitions","volume":"96 1","pages":"328 - 336"},"PeriodicalIF":1.6,"publicationDate":"2023-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44715384","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 : 2023-03-10DOI: 10.1080/01411594.2023.2182210
Manashi Paul, C. Datta
ABSTRACT Dinuclear Ni(II), Cd(II) and Hg(II) complexes have been prepared from photoluminescent salicylaldimine tetra-coordinated [N4O4] donor compartmental Schiff base ligand. The photophysical and mesogenic properties of the compounds are investigated. The compounds are characterized by elemental analyses, mass, 1HNMR, FT-IR and UV–visible spectroscopy. The complexes adopted distorted square planar geometry. The ligand and Ni complex exhibit monotropic thermal transition in DSC thermogram whereas Cd or Hg complexes are non-mesogenic. All the complexes displayed blue emission at ∼450 nm.
{"title":"Homodinuclear tetradentate Schiff base complexes of nickel(II), cadmium(II) and mercury(II): synthesis, photophysical and mesophase investigation","authors":"Manashi Paul, C. Datta","doi":"10.1080/01411594.2023.2182210","DOIUrl":"https://doi.org/10.1080/01411594.2023.2182210","url":null,"abstract":"ABSTRACT Dinuclear Ni(II), Cd(II) and Hg(II) complexes have been prepared from photoluminescent salicylaldimine tetra-coordinated [N4O4] donor compartmental Schiff base ligand. The photophysical and mesogenic properties of the compounds are investigated. The compounds are characterized by elemental analyses, mass, 1HNMR, FT-IR and UV–visible spectroscopy. The complexes adopted distorted square planar geometry. The ligand and Ni complex exhibit monotropic thermal transition in DSC thermogram whereas Cd or Hg complexes are non-mesogenic. All the complexes displayed blue emission at ∼450 nm.","PeriodicalId":19881,"journal":{"name":"Phase Transitions","volume":"96 1","pages":"290 - 300"},"PeriodicalIF":1.6,"publicationDate":"2023-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59119785","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 : 2023-03-08DOI: 10.1080/01411594.2023.2184360
K. Vijayan, S. P. Vijayachamundeeswari
ABSTRACT This work is focused on the optimization and characterization of copper gallium sulfide (CuGaS2) thin film prepared via the spray pyrolysis route. Chalcogenides are compounds having a chalcogen anion and an electropositive element, and these thin films have more absorption coefficients. The structural, optical, electrical, and morphological properties of CuGaS2 thin films are studied using X-ray diffraction (XRD), Scanning electron microscopy (SEM), UV-Vis-NIR Spectroscopy, and Hall effect techniques. The above characteristics are studied for both as prepared and annealed Copper Gallium Sulfide (CGS) thin films. These films have a chalcopyrite tetragonal crystal structure. It is a promising material for solar cell applications due to its suitable bandgap and good electrical stability. The results of this study provide a framework for fabricating an optimized CGS absorber layer in photovoltaic solar cells. GRAPHICAL ABSTRACT Schematic diagram of preparation of CGS thin films by Spray Pyrolysis Technique.
{"title":"Effect of temperature and improving the optoelectrical attributes of copper gallium sulfide (CuGaS2) thin films","authors":"K. Vijayan, S. P. Vijayachamundeeswari","doi":"10.1080/01411594.2023.2184360","DOIUrl":"https://doi.org/10.1080/01411594.2023.2184360","url":null,"abstract":"ABSTRACT This work is focused on the optimization and characterization of copper gallium sulfide (CuGaS2) thin film prepared via the spray pyrolysis route. Chalcogenides are compounds having a chalcogen anion and an electropositive element, and these thin films have more absorption coefficients. The structural, optical, electrical, and morphological properties of CuGaS2 thin films are studied using X-ray diffraction (XRD), Scanning electron microscopy (SEM), UV-Vis-NIR Spectroscopy, and Hall effect techniques. The above characteristics are studied for both as prepared and annealed Copper Gallium Sulfide (CGS) thin films. These films have a chalcopyrite tetragonal crystal structure. It is a promising material for solar cell applications due to its suitable bandgap and good electrical stability. The results of this study provide a framework for fabricating an optimized CGS absorber layer in photovoltaic solar cells. GRAPHICAL ABSTRACT Schematic diagram of preparation of CGS thin films by Spray Pyrolysis Technique.","PeriodicalId":19881,"journal":{"name":"Phase Transitions","volume":"96 1","pages":"350 - 360"},"PeriodicalIF":1.6,"publicationDate":"2023-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46136580","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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