Ghulam Ishaq Khan Institute of Engineering Sciences and Technology

About: Ghulam Ishaq Khan Institute of Engineering Sciences and Technology is a education organization based out in Topi, Pakistan. It is known for research contribution in the topics: Thin film & Quantum efficiency. The organization has 618 authors who have published 940 publications receiving 10674 citations.

Rheology of mixed convective Casson nanofluid in a convectively heated stratified medium

Abstract: A mathematical framework for mixed convective non-Newtonian nanoliquid subjected to hydromagnetic characteristics is addressed in this attempt. The well-known Buongiorno nanoliquid model which elaborates thermophoretic and Brownian diffusions aspect is opted for formulation. In addition, heat generation, double stratification and convective conditions are retained. Apposite variables are introduced for dimensionless procedure. Homotopy scheme is employed to attain convergent expressions. Graphs are presented for description of sundry variables effect versus dimensionless quantities.

Reduction of efficiency droop by inserting superlattice quaternary-ternary electron blocking layer in GaN-based light-emitting diodes

Abstract: We report a reduced the unwanted hole blocking of the electron blocking layer (EBL) by replacing the conventional EBL with a quaternary-ternary superlattice electron blocking layer. The effective barrier height for holes is reduced from ~ 348 meV to ~ 261 meV, thus, improving the concentration of holes by ~ 50% with respect to LED with conventional EBL. Similarly, the radiative recombination rate is also improved by ~ 79%. As a result, the overall droop ratio of internal quantum efficiency (IQE) of the proposed LED is reduced to ~ 23% at 100 A/cm2 in comparison to conventional LED.

Anodic Oxidation of Methylene Blue Dye from Aqueous Solution Using SnO2 Electrode

Abstract: This study was performed to investigate the electrochemical oxidation of a solution containing methylene blue dye by using a tin oxide (SnO2) electrode. The effect of several operating factors such as electrolyte types, current density, initial dye concentration, and pH were investigated by following the discolorationand COD removal. The results show that the maximum color was removed by using chloride supporting electrolyte (i.e. KCl and NaCl) indicating that the indirect oxidation was promoted by the strong oxidant species (i.e. Cl2 and ClO–) generated at the anode surface. The best experimental conditions were attained for i = 60mA/cm2, 1% KCl and pH = 3, in which 100% of color was removed after 30 minutes and the COD removal reached 80.9% after 120 min. These results reveal that the anodic oxidation technique using SnO2 electrode could be used to remove the methylene blue dye from textile wastewater.

Proton Capture Cross-section for 12 C at Low Energy

Abstract: The total cross-section, astrophysical S-factor, and rate of radiative capture reaction 12C(p, γ)13N are calculated using the potential model. In this work, we take into account the capture of protons through s1/2 → p1/2 and d3/2 → p1/2 single-particle transitions, fine-tune the values of the depth and nuclear radius of the Woods-Saxon potential to achieve better comparison with the measured data. The results for the elastic scattering phase shift, astrophysical S-factor, and rates are compared with the previously reported results of the calculations and experimental data.

Effect of pre-rolling temperature on the interfacial properties and formability of steel-steel bilayer sheet in Single Point Incremental Forming:

Abstract: The aim of this research was to investigate the effect of pre-rolling temperature on the interfacial properties in delamination modes 1 and 2; and formability in Single Point Incremental Forming (S...