Global Research Footprint
Young Researchers and Innovators
Tabiri Kwayie Asumadu (PhD)
Tabiri Kwayie Asumadu (PhD)
Tabiri Kwayie Asumadu (PhD)
Materials Science and Engineering
SUNY Polytechnic Institute, USA
Sunyani Technical University, Ghana
Desmond Klenam (PhD)
Tabiri Kwayie Asumadu (PhD)
Tabiri Kwayie Asumadu (PhD)
Materials Science and Engineering
University of the Witwatersrand, Johannesburg
South Africa
Elvis Twumasi (PhD)
Tabiri Kwayie Asumadu (PhD)
Sarah Akua Osafo (PhD)
Electrical and Electronic Engineering
Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
Sarah Akua Osafo (PhD)
Kwadwo Mensah-Darkwa (PhD)
Sarah Akua Osafo (PhD)
Materials Science and Engineering
University of Ghana, Accra, Ghana
Kwadwo Mensah-Darkwa (PhD)
Kwadwo Mensah-Darkwa (PhD)
Kwadwo Mensah-Darkwa (PhD)
Materials Science and Engineering
Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
Michael Bodunrin, (PhD)
Kwadwo Mensah-Darkwa (PhD)
Kwadwo Mensah-Darkwa (PhD)
Metallurgy and Materials Engineering,
University of the Witwatersrand, Johannesburg, South Africa
Nestor Ankah, (PhD)
Felix Amankwah Diawuo, (PhD)
Felix Amankwah Diawuo, (PhD)
Materials Science and Engineering
King Fahd University of Mineral and Petroleum, Saudi Arabia
Felix Amankwah Diawuo, (PhD)
Felix Amankwah Diawuo, (PhD)
Felix Amankwah Diawuo, (PhD)
Sustainable Energy Systems
University of Energy and Natural Resources, Sunyani, Ghana
Innovative Research
Graphene based superlubricious coatings
Cold spray coatings of complex concentrated alloys
Cold spray coatings of complex concentrated alloys
This paper discusses experimental and computational results of ultralow (near-zero) friction of carbon-coated metallic depositions on substrates of structural steels, Ti, and Ni alloys. The macroscale superlubricity was demonstrated and sustained over several cycles through structurally misoriented carbon coatings on the metallic surfaces. Carbon nanocrystals with variants of graphene footprints were deposited on these metallic surfaces using a novel high temperature biowaste treatment process.
Cold spray coatings of complex concentrated alloys
Cold spray coatings of complex concentrated alloys
Cold spray coatings of complex concentrated alloys
Complex concentrated alloys (CCAs) are structural and functional materials of the future with excellent mechanical, physical, and chemical properties. Due to the equiatomic compositions of these alloys, cost can hinder scalability. Thus, the development of CCA-based coatings is critical for low-cost applications. The application of cold spray technology to CCAs is in its infancy with emphasis on transition elements of the periodic table.
Improvement of grey system model using particle swarm optimization
Phase-heterojunction all-inorganic perovskite solar cells surpassing 21.5% efficiency
Phase-heterojunction all-inorganic perovskite solar cells surpassing 21.5% efficiency
An improvement of the traditional grey system model, GM(1,1), to enhance forecast accuracy, has been realized using the particle swarm optimization (PSO) algorithm. Unlike the GM(1,1) which uses a fixed adjacent neighbor weight for all data sets, the proposed PSO-improved model, PSO-GM(1,1), determines an optimal adjacent neighbor weight, based on the presented data set. This optimal adjacent neighbor weight so determined is the principal factor that enhances forecast accuracy.
Phase-heterojunction all-inorganic perovskite solar cells surpassing 21.5% efficiency
Phase-heterojunction all-inorganic perovskite solar cells surpassing 21.5% efficiency
Phase-heterojunction all-inorganic perovskite solar cells surpassing 21.5% efficiency
Making organic–inorganic metal halide-based multijunction perovskite solar cells either by solution processes or physical techniques is not straightforward. Here we propose and developed dimethylammonium iodide-assisted β−CsPbI3 and guanidinium iodide-assisted γ−CsPbI3 all-inorganic phase-heterojunction solar cells (PHSs) by integrating hot-air and triple-source thermal evaporation deposition techniques, respectively. Incorporating a (Zn(C6F5)2) molecular additive and dopant-free hole transport layer produces a 21.59% power conversion efficiency (PCE).
