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N. S. Khairuddin^a, M. Z. Mohd Yusoff^a,*, H. Hussin^b
Chalcogenide Letters, Vol.20, No.9, pp. 629-637, 2023, DOI:10.15251/CL.2023.209.629
Abstract In this study, we used the PC1D simulator to demonstrate the performance analysis of a solar cell model based on gallium nitride (GaN). It has been discovered that when the layer thickness of the GaN substrate grows, the efficiency of solar cells decreases. This was found by comparing the doping concentration and layer thickness on the GaN and silicon substrates. As the thickness of the p-doping Si layer rises, cell efficiency increases just modestly. The optimal doping concentrations for GaN and p-silicon are 1x10¹⁸ cm^-3 and 1x10¹⁷ cm^-3 , respectively. In compared to other designs, GaN/p-silicon solar More >

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L. Yang^*, X. Q. Yuan, R. Y. Liu, R. X. Song, Q. W. Wang, W. Liang
Chalcogenide Letters, Vol.20, No.9, pp. 639-648, 2023, DOI:10.15251/CL.2023.209.639
Abstract In this paper, we report a facile method for the synthesis of MoS₂ nanosheet/ MoS₂ nanowire homostructures by growing MoS₂ nanosheets on the surface of MoS₂ nanowires. Benefiting from the uniform coating of MoS2 nanosheets on the surface of MoS2 nanowires, the MoS₂ nanosheet/ MoS₂ nanowire homostructures highly expose their electrocatalytic active edge sites and exhibit an enhanced electrocatalytic performance. It demonstrates a low overpotential of 107 mV at 10 mA/cm² and a small Tafel slope of 64 mV/dec in 0.5 M H₂SO₄. This work provides an inspiration for the design of efficient electrocatalysts with no stacking and aggregation More >

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J. H. Azzawi^a, B. A. Ahmed^b, K. A. Jasim^b, E. M. T. Salman^b,*
Chalcogenide Letters, Vol.20, No.9, pp. 649-656, 2023, DOI:10.15251/CL.2023.209.649
Abstract The DC electrical conductivity properties of Ge₆₀Se_40-xTe_x alloy with x = 0, 5, 10, 15 and 20). The samples were formed in the form of discs with the thickness of 0.25–0.30 cm and the diameter of 1.5 cm. Samples were pressed under a pressure of 6 tons per cm² , using a ton hydraulic press. They were prepared after being pressed using a ton hydraulic press using a hydraulic press. Melting point technology use to preper the samples. Continuous electrical conductivity properties were recorded from room temperature to 475 K. Experimental data indicates that glass containing… More >

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