Chalcogenide Letters最新文献

{"title":"Colloidal synthesis of ZnTe nanocrystals by laser ablation and fabrication of hybrid light emitting device","authors":"A. M. Kadim, M. K. Abid","doi":"10.15251/cl.2024.214.327","DOIUrl":"https://doi.org/10.15251/cl.2024.214.327","url":null,"abstract":"Zinc telluride (ZnTe) nanocrystals (NCs) have generated the interest of researchers as an electrode material in hybrid light emitting devices (HLEDs) due to its potentially high capacity. However, due to the restricted fundamental charging capacity of the electrode materials, the available energy of existing nanomaterial light emitting devices remains enough for a wide range of applications. In this research, ZnTe nanocrystals were synthesized using Nd: YAG laser at energy 600 mJ by 150 pulse number to form a battery device out of ITO/ZnTe/TPD/Ni. The spectra of the ZnTe NCs were assessed using ultraviolet-visible (UV-VIS) and photoluminescence (PL). The results proved that the synthesized NCs were nanocrystalline structures. The energy gap (Eg) within ZnTe NCs regarded as (PL) spectrum has been identified to be about 3.6 eV. ZnTe NCs produced via laser ablation enhance the functionality of the HLEDs by increasing the carrier's charge mobility and, as a further benefit, by facilitating recombination processes inside ZnTe NCs with TPD organic polymer. In addition to lighting at 3V, current-voltage (I-V) specifications establish suitable environment as well as formation.","PeriodicalId":9710,"journal":{"name":"Chalcogenide Letters","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140986183","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}

{"title":"Exploring of Be1-xCrxSe alloys for spintronics and optoelectronic applications","authors":"H. Ambreen, S. Saleem, S. Aldaghfag, M. Zahid, S. Noreen, M. Ishfaq, M. Yaseen","doi":"10.15251/cl.2024.214.365","DOIUrl":"https://doi.org/10.15251/cl.2024.214.365","url":null,"abstract":"In this study, spin polarized density functional theory (DFT) is implemented to predict physical characteristic of Be1-xCrxSe (x = 6.25%, 12.5%, 18.75%, 25%) compound. The electronic characteristics of pure BeSe compound show semiconductor behavior but after Cr doping BeSe elucidate half-metallic ferromagnetism (HMF) for all doping concentrations. The outcomes elucidate the total magnetic moment MTot per Cr-atom are 4.0028, 4.0027, 4.0021 and 4.0002 μB for 6.25%, 12.5%, 18.75%, 25% concentrations, respectively and the magnetism mainly originated from d-state of the impurity atom which is further ensured from the magnetic spin density. Furthermore, the optical parameters are also computed to determine the effect of doping on the material’s response to incident light of energy spanning from 0 to 10 eV. The optical study depict that the studied systems possess maximum absorbance and optical conductivity in UV-range with minimal reflection. The overall outcomes illustrate that the Cr doped beryllium selenide (BeSe) is promising material for spintronic and optoelectronic devices.","PeriodicalId":9710,"journal":{"name":"Chalcogenide Letters","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140982742","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}

{"title":"Impact of aluminum fluoride addition on crystallization, structure and thermal properties of lead borate glasses","authors":"Y. Hordieiev, A. Zaichuk","doi":"10.15251/cl.2024.213.243","DOIUrl":"https://doi.org/10.15251/cl.2024.213.243","url":null,"abstract":"The glass composition (70-x)PbO–(30-y)B2O3–(x+y)AlF3, where x and y ranges from 0 to 20 mol%, were prepared using the conventional melt-quenching-annealing technique. The structural and thermal properties of the glasses were comprehensively analyzed using techniques like Differential Thermal Analysis (DTA), Dilatometry, Fourier-Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM). XRD confirmed the amorphous, non-crystalline structure of the glasses. The glass network was found to be composed of structural units such as PbO4, BO4, BO3 and AlO6 using FTIR spectroscopy. FTIR analysis revealed significant structural changes, including the transformation of BO4 to BO3 units and the increase in non-bridging bonds, particularly with higher AlF3 content. DTA was instrumental in determining characteristic temperatures, such as the glass transition, melting, and peak crystallization temperatures, along with glass stability parameters (∆T, Hr, Tgr) for all samples. The study found that the addition of AlF3 led to a decrease in these characteristic temperatures when replacing B2O3, but an increase when replacing PbO. Variations in the density and thermal expansion of the lead borate glass were observed upon the addition of AlF3, decreasing when substituting for PbO and increasing when substituting for B2O3. These findings provide insights into the properties of oxyfluoride glasses, paving the way for future optimization in their composition for varied applications.","PeriodicalId":9710,"journal":{"name":"Chalcogenide Letters","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140380148","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}

{"title":"Numerical simulation of Sb2Se3-based solar cells","authors":"S. H. Liu, J. R. Yuan, Y. Wu, X. H. Deng, Q. M. Yu","doi":"10.15251/cl.2024.213.229","DOIUrl":"https://doi.org/10.15251/cl.2024.213.229","url":null,"abstract":"Antimony selenide (Sb2Se3) has remarkable optoelectronic capabilities that make it a promising option for the next generation solar cells. In this work, a solar cell with the structure Al/FTO/CdS/Sb2Se3/Mo is modeled and numerically analyzed using SCAPS-1D program. Furthermore, a Al/FTO/CdS/Sb2Se3/Sb2S3/Mo solar cell structure that uses Sb2S3 as the back surface field (BSF) layer is proposed. A comprehensive examination of photovoltaic characteristics for the solar cells was carried out. The optimization process involved adjusting the operating temperature, series and shunt resistance, doping concentration, bulk defect density, back contact metal work function, and thickness of the absorber layer. The optimized Sb2Se3-based solar cell with Sb2S3 material showed a conversion efficiency of 28.91%, suggesting that Sb2Se3-based solar cells have a great deal of potential for further development.","PeriodicalId":9710,"journal":{"name":"Chalcogenide Letters","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140378862","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}

{"title":"Studies of Sb2S3-As2S3 glasses by quenching methods and Raman spectroscopy","authors":"K. N’dri, B. Dally, C. Vamoussa, D. Houphouët-Boigny","doi":"10.15251/cl.2024.213.255","DOIUrl":"https://doi.org/10.15251/cl.2024.213.255","url":null,"abstract":"Glasses of Sb2S3-As2S3 system with nominal composition of As0,4xSb0,4(100-x)S60 (where x= 10, 25, 50, 75 and 100 mol% As2S3) were investigated by different quenching methods and Raman spectroscopy. All studied samples were in the vitreous state. The average coordination number (Z), being equal to 2.4, has indicated that the numbers of neighbors of non-chalcogens (As and Sb) and chalcogens (S and Te) atoms were respectively 3 and 2. These coordination numbers were conditions fulfilled by the atoms to obtain vitreous materials. The vibrations of the SbS3 and AsS3 structural units dominated the Raman spectra of the studied Sb2S3-As2S3 glasses.","PeriodicalId":9710,"journal":{"name":"Chalcogenide Letters","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140381057","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}

{"title":"MoSe2 in flower spheres provides abundant active sites for TiO2 photocatalytic degradation of RhB","authors":"M. Xie, W.W. Lu, W. Yan, Y. C. Wei, Y. P. Chen, J. Xu","doi":"10.15251/cl.2024.213.217","DOIUrl":"https://doi.org/10.15251/cl.2024.213.217","url":null,"abstract":"In this paper, a MoSe2/TiO2 composite photocatalyst was constructed by modifying TiO2 with MoSe2 as a group catalyst. The results showed that pure TiO2 and MoSe2 had no degradation activity for RhB, and the composite catalyst of 0.03 g MoSe2 had the best photocatalytic degradation activity for RhB. Through SEM, TEM, UV-VIS absorption spectrum, transient photocurrent curve, photoluminescence spectrum, and electrochemical impedance spectrum analysis, it can be seen that the excellent performance of 0.03 g MoSe2 composite sample is due to its excellent nanostructure, and uniform TiO2 nanosheets are attached to MoSe2 flower spheres. The active site of RhB photocatalytic degradation was increased, the visible light response and photobiological carrier separation were enhanced, and TiO2 had photocatalytic activity under simulated sunlight.","PeriodicalId":9710,"journal":{"name":"Chalcogenide Letters","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140378654","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}

{"title":"Structural and spectroscopic correlation in barium-boro-tellurite glass hosts: effects of Dy2O3 doping","authors":"S. Hathot, B. M. Al Dabbagh, H. Aboud","doi":"10.15251/cl.2024.212.201","DOIUrl":"https://doi.org/10.15251/cl.2024.212.201","url":null,"abstract":"In this study, a series of barium-boro-tellurite glass hosts with varying concentration of Dy2O3 doping (0 to 1.25 mol%) were made by melt-quenching method. A study was conducted to investigate how Dy2O3 dopants affect the physical and spectroscopic traits of glasses. Raw materials including barium oxide (BaO), tellurium dioxide (TeO2), boron oxide (B2O3), and dysprosium oxide (Dy2O3) were used to produce these glasses. XRD patterns of the samples showed a broad hump and absence of long-range periodic lattice arrangements, indicating their amorphous nature. The Raman spectral analyses displayed the various vibration modes where the most intense band caused by BaO vibrations at 300 cm-1 and 450 cm-1 corresponding to the symmetric stretching vibration mode of Te–O–Te intra-chain bridges. The peak at 750 cm-1 was due to TeO4 and Te-O-Te vibration modes. The value of optical band gap energy was decreased from 3.155 to 2.1894 eV and then increase at higher Dy2O3 level (0.75 to 1.25 mol%). At Dy3+ contents between 0.25 to 1.25 mol% seven absorption bands were observed at 390, 424, 452, 750, 797, 895 and 1092 nm due to the electronic transitions in Dy3+. The glass refractive indices were raised from 2.3563 to 2.6584 and then decreased at higher Dy2O3 contents which was mainly because of the generation of more bridging oxygen (BO) in the glass matrix. The value of glass electronic polarizability and oxide ions polarizability calculated using LorentzLorenz equation showed a decrease with the rise of Dy2O3 contents, which was ascribed to the presence of fewer non-bridging oxygen (NBO). The optical basicity of the proposed glass hosts was calculated using Duffy and Ingram equation which was decreased with the increase of doping contents. In addition, the optical transmission was increased and reflection loss was reduced with increasing Dy+3 levels. The value of metallization parameter below 1 proved the true amorphous nature of the prepared samples. All the glasses revealed blue and yellow photoluminescence emission peaks due to 4F9/2→ 6H15/2, and 4F9/2 →6H13/2 transitions in Dy3+, respectively. The proposed glass compositions may be beneficial for the advancement of solid-state lasers.","PeriodicalId":9710,"journal":{"name":"Chalcogenide Letters","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140274981","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}

{"title":"Synthesis and characterizations of Cu2MgSnS4 nanoparticles by solvothermal method","authors":"H. Guan, J. X. Xu, Z. Y. Yang, X. Y. Qian, M. Q. Zhao","doi":"10.15251/cl.2024.212.169","DOIUrl":"https://doi.org/10.15251/cl.2024.212.169","url":null,"abstract":"Cu2MgSnS4 (CMTS) nanoparticles are successfully prepared via a solvothermal approach. X-ray diffraction (XRD) and Raman reveal that pure zinc-blende CMTS phase is obtained. Scanning electron microscopy (SEM) shows that CMTS nanoparticles exhibit microsphere structure. The band gap of as-obtained CMTS nanoparticles is calculated to be 1.68eV, indicating a potential candidate for tandem solar cells. The degradation rate of methylene blue (MB) with under visible-light irradiation is about 87%, indicating that CMTS can be useful for effective visible-light photocatalyst.","PeriodicalId":9710,"journal":{"name":"Chalcogenide Letters","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140281755","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}

{"title":"Study of electronic structure, elastic and thermodynamic properties of Cu2MgSnS4 under different pressures","authors":"H. J. Hou, Su Fan, H. Y. Wang, W. X. Chen, X. W. Lu, S. R. Zhang, L. Xie","doi":"10.15251/cl.2024.212.189","DOIUrl":"https://doi.org/10.15251/cl.2024.212.189","url":null,"abstract":"The electronic structure, elastic and thermodynamic properties of Cu2MgSnS4 was studied based on density functional theory (DFT). The results show that Cu2MgSnS4 is a direct bandgap semiconductor. The B/G of Cu2MgSnS4 is greater than 1.75, indicating that Cu2MgSnS4 is a ductile material. Through the study of thermodynamic properties, it is found that the temperature increases, the bulk modulus B and Debye temperature Θ decrease, while the heat capacity CV, entropy S, Grüneisen constant γ and thermal expansion coefficient α increase, and the heat capacity is close to the Dulong-Petit limit. As the pressure increases, the bulk modulus B, Debye temperature Θ increases, while the entropy S, Grüneisen constant γ and heat capacity CV decrease.","PeriodicalId":9710,"journal":{"name":"Chalcogenide Letters","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140268199","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}

{"title":"SCAPS numerical design of MoSe2 solar cell for different buffer layers","authors":"T. A. Chowdhury, R.B. Arif, H. Israq, N. Sharmili, R. S. Shuvo","doi":"10.15251/cl.2024.212.175","DOIUrl":"https://doi.org/10.15251/cl.2024.212.175","url":null,"abstract":"The solar cell capacitance simulator (SCAPS-1D) has been used to simulate, design and analyze of MoSe2, an attractive transition metal dichalcogenide (TMDC) material, based heterojunction solar cells to use it as a potential alternative to conventional absorber layers used in solar cells. The work also focuses on finding optimal absorber, buffer layer thickness and impact of operating temperature on solar cell performance with a possible replacement to toxic CdS buffer layer. It has been obtained that the optimum thickness of MoSe2 absorber layer is 1 µm and buffer layer is about 0.04 µm. The efficiency obtained with CdS based buffer layer solar cell is 20.21%. Among different buffer layers such as In2S3, ZnO, ZnOS and ZnSe, the highest efficiency obtained of MoSe2 based solar cell is 20.58% with ZnO buffer layer. ZnO buffer based solar cell shows a temperature gradient of -0.355%/K compared to -0.347%/K for CdS buffer based solar cell. The findings of this work provide important guidance to fabricate high-efficiency MoSe2 thin film solar cell with non-toxic ZnO as a potential buffer layer.","PeriodicalId":9710,"journal":{"name":"Chalcogenide Letters","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140274251","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}