Browsing Rsif Grantees' Publications by Title

Now showing items 1-20 of 25

Ab initio study of K3Cu3P2 material for photovoltaic applications

Mbilo, Mwende; S. Manyali, George; J. Musembi, Robinson (Computational Condensed Matter, 2022-07-29)

Search for efficient materials for application in the fields of optoelectronics and photovoltaics are some of the most active areas of research across the world. The potential of compounds such as K3Cu3P2 is not yet fully ...
Ab Initio Study of Structural, Electronic, Elastic, Mechanical, and Optical Properties of K4XP2 (X = Zn, Cd) Compounds for Optoelectronic Applications

Mbilo, Mwende; Musembi, Robinson (Materialia, 2022-09-21)

The structural electronic, elastic, mechanical and optical properties of the ternary compounds K4ZnP2 and K4CdP2 have been studied by means of density functional theory (DFT) using the plane waves method. The generalized ...
Ab-initio computation of structural, elastic, mechanical and optical properties of Cs2ScAgI6 double perovskite semiconductor compound

Musembi, Robinson; Mbilo, Mwende (MRS Advances, 2023-05-25)

A novel Cs2ScAgI6 double perovskite semiconductor material has been investigated on electronic, mechanical, elastic and optical properties using the plane wave self-consistent field method by using generalised gradient ...
Analysis of K4ZnAs2 Zintl phased ternary semiconductor compound for optoelectronic application

Wafula, Samuel; Nyongesa, Francis (Results in Materials, 2023-10-07)

In this study, Zintl phased tetrapotassium diarsenidozincate K4ZnAs2 semiconductor compound was analysed using ab initio methods for structural, electronic, mechanical, elastic, and optical properties using six exchange ...
Analysis of ternary K3Cu3As2 compound for photovoltaic applications using density functional theory

Mbilo, Mwende; Musembi, Robinson (Journal of the Korean Ceramic Society, 2022-11-10)

Ternary semiconductor materials are attractive compounds for optoelectronic and photovoltaic applications due to their valuable properties. A key challenge in photovoltaics is to develop alternative materials with good ...
Comparative performance evaluation of modified red onion skin extract as surface active agents for tertiary oil recovery

Obuebite, Amalate Ann; Eke, William Iheanyi; Victor-Oji, Cynthia; Una, Dominica Christopher (Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2023-05-02)

Biomass-based recovery agents are fast becoming an innovative, novel solution to the increasing need for eco-friendly, cost-effective chemical agents as the need to cut production cost becomes imperative. Recent studies ...
Comprehensive assessment of heat pump dryers for drying agricultural products

B. T. Loemba, Aldé; Kichonge, Baraka; Kivevele, Thomas (Energy Science & Engineering, 2022-11-06)

Fruits and vegetables are agricultural products that require preservation to enhance and protect shelf life, encapsulate natural flavour, and retain nutritional content. Globally, agricultural products are preserved by a ...
DFT study of cubic, tetragonal and trigonal structures of KGeCl3 perovskites for photovoltaic applications

.M Namisi, Mauwa; J. Musembi, Robinson; M. Mulwa, Winfred; O. Aduda, Bernard (Computational Condensed Matter, 2022-11-24)

The study of suitable compounds for photovoltaic applications is one of the most fascinating research areas in the world. One of the less studied materials is KGeCl3 and its potential is yet to be fully determined. ...
Effects of Annealing Ambient on the Structural, Optical and Electrical Properties of TiO2:Ge Thin Films

A. Owino, Lilian; Waita, Sebastian; J. Musembi, Robinson; W. Nyongesa, Francis (Tanzania Journal of Science, 2022-03)

TiO2, a semiconducting material with a wide energy band gap, has been researched intensively due to its interesting properties and many potential applications. The films properties can as well be modified by preparing the ...
Feasibility of mapping radioactive minerals in high background radiation areas using remote sensing techniques

Ondieki, J.O.; Mito, C.O.; Kaniu, M.I. (International Journal of Applied Earth Observation and Geoinformation, 2022-02-02)

This study investigates the utility of using remote sensing and geographic information system techniques to accurately infer the presence of radioactive minerals in a typical high background radiation area (HBRA) by analyzing ...
First principles calculation to investigate the structural, electronic, elastic, mechanical, and optical properties of K2NiP2 ternary compound

Mbilo, Mwende; Musembi, Robinson (AIP Advances, 2022-10)

First-principles calculations of the structural, electronic, elastic, mechanical, and optical properties of the K2NiP2 ternary compound using density functional theory as implemented in the quantum espresso package have ...
First-Principle Calculations to Investigate Structural, Electronic, Elastic, Mechanical, and Optical Properties of K2CuX (X=As, Sb) Ternary Compounds

Mbilo, Mwende; Musembi, Robinson (Advances in Materials Science and Engineering, 2022-09-20)

Efficient materials with good optoelectronic properties are required for the good performance of photovoltaic devices. In this work, we present findings of a theoretical investigation of the structural, electronic, elastic, ...
First-principles study of properties of X3Sb2Au3 (X = K, Rb) ternary compounds for photovoltaic applications

Mbilo, Mwende; Musembi, Robinson; Rai, D. P. (Indian Journal of Physics, 2022-12-14)

In this work, the structural, electronic, elastic, and optical properties of X3Sb2Au3 (X = K, Rb) ternary compounds have been investigated using the density-functional theory method as implemented in the quantum espresso ...
Influence of Duct Configurations on the Performance of Solar-Assisted Heat Pump Dryer for Drying Tobacco Leaves

Suleiman, Salum Abdulkarim; Pogrebnoi, Alexander; Kivevele, Thomas T. (International Journal of Photoenergy, 2023-05-16)

In the present study, a solar-assisted heat pump dryer (SAHPD) has been designed, fabricated, and tested its performance on drying tobacco leaves. The hot air generated from the solar collector and condenser unit of the ...
Influence of the pH of anthocyanins on the efficiency of dye sensitized solar cells

Okello, Alex; Owino Owuor, Brian; Namukobe, Jane; Okello, Denis; Mwabora, Julius (Heliyon, 2022-07-09)

The influence of the pH of anthocyanins on photovoltaic performance in dye-sensitized solar cells has been investigated. Anthocyanins were extracted from crushed leaf stocks of Manihot esculenta Crantz (Cassava plant) using ...
Laboratory evaluation of red onion skin extract and its derivative as biomass-based enhanced oil recovery agents

Amalate Obuebite, Ann; Onyekachi Victor-Oji, Cynthia; Iheanyi Eke, William (Scientific African, 2022-11-23)

The use of natural alternatives as oilfield chemicals is gradually gaining attention among researchers due to their eco-friendly nature. The aim of this study was to determine the efficiency of red onion skin extract (ROSE) ...
Monolith Cs1-xRbxSnI3 perovskite – silicon 2T tandem solar cell using SCAPS-1D

Akoto, Emmanuel; Isahi, Victor; Odari, Victor; Maghanga, Christopher; Nyongesa, Francis (Results in Optics, 2023-06-28)

Tandem solar cells (TSCs) have gained notoriety by the use of various absorber layers with different bandgaps. The photovoltaic characteristics of Cs1-xRbxSnI3 perovskite – silicon TSCs were determined through simulation ...
New findings on a Zintl phased K3Ag3As2 ternary semiconductor compound for photovoltaic applications by first-principles methods

Kimuyu, Magdalene Mutheu; Musembi, Robinson; Mwabora, Julius; Nyongesa, Francis (Materials Advances, 2023-12-28)

A Zintl-phased K3Ag3As2 ternary compound previously not studied using ab initio techniques was analysed for its structural, electronic, mechanical, elastic, and optical properties using LDA-PZ, GGA-EV, GGA-PBE, GGA-PBESol, ...
Optoelectronic property refinement of FASnI3 films for photovoltaic application

Okoth Obila, Jorim; Lei, Hongwei; Omollo Ayieta, Elijah; Awuor Ogacho, Alex; O. Aduda, Bernard; Wang, Feng (Materials Letters, 2021-05-24)

Tin (Sn) is a promising substitute for lead (Pb) in organic–inorganic hybrid halide perovskite-photovoltaic devices, but it is prone to delivering low power conversion efficiencies (PCEs) due to the poor quality of ...
Orange Mesocarp Extract as a Natural Surfactant: Impact on Fluid–Fluid and Fluid–Rock Interactions during Chemical Flooding

Obuebite, Amalate Ann; Okwonna, Obumneme Onyeka; Eke, William Iheanyi; Akaranta, Onyewuchi (ACS Publications, 2024-01-12)

Surfactant flooding has suffered a huge setback owing to its cost and the ecotoxic nature of synthetic surfactants. The potential of natural surfactants for enhanced oil recovery has attracted a great deal of research ...

Now showing items 1-20 of 25

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