Materials Map

Discover the materials research landscape. Find experts, partners, networks.

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The Materials Map is an open tool for improving networking and interdisciplinary exchange within materials research. It enables cross-database search for cooperation and network partners and discovering of the research landscape.

The dashboard provides detailed information about the selected scientist, e.g. publications. The dashboard can be filtered and shows the relationship to co-authors in different diagrams. In addition, a link is provided to find contact information.

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Materials Map under construction

The Materials Map is still under development. In its current state, it is only based on one single data source and, thus, incomplete and contains duplicates. We are working on incorporating new open data sources like ORCID to improve the quality and the timeliness of our data. We will update Materials Map as soon as possible and kindly ask for your patience.

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in Cooperation with on an Cooperation-Score of 37%

Topics

Publications (3/3 displayed)

  • 2019Ga doping of nanocrystalline CdS thin films by electrodeposition method for solar cell application: The influence of dopant precursor concentration10citations
  • 2019Electrochemical deposition and characterization of thin-film Cd1-xZnxS for solar cell application27citations
  • 2019Structural, vibrational, optical, morphological and compositional properties of CdS films prepared by a low-cost electrochemical technique21citations

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Chart of shared publication
Dharmadasa, I.
1 / 26 shared
Ojo, A. A.
1 / 12 shared
Echendu, O. K.
3 / 11 shared
Dejene, F. B.
3 / 4 shared
Chart of publication period
2019

Co-Authors (by relevance)

  • Dharmadasa, I.
  • Ojo, A. A.
  • Echendu, O. K.
  • Dejene, F. B.
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article

Structural, vibrational, optical, morphological and compositional properties of CdS films prepared by a low-cost electrochemical technique

  • Echendu, O. K.
  • Dejene, F. B.
  • Werta, S. Z.
Abstract

Very dense and uniform thin films of CdS were deposited on fluorine-doped tin oxide (FTO) substrates for thin film semiconductor devices application, such as in solar cells. The simplified electrochemical deposition method applied uses two-electrode system with FTO as the working electrode and high-purity graphite rod as the counter electrode. The CdS films grown at different cathodic voltages (1500 mV, 1550 mV and 1600 mV) were characterized for their structural, vibrational, optical, morphological and chemical compositional properties using state-of-the-art glancing incidence X-ray diffraction (GIXRD), Raman spectroscopy, UV–Visible spectrophotometry, scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) respectively. XRD results reveal the existence of pure hexagonal crystal structure of CdS in the films in both as-grown and heat-treated conditions. The size of crystallites are in the range of (9–14) nm and (11–17) nm while the size of grains in these highly uniform and dense films are in the range (180–860) nm and (270–880) nm before and after annealing respectively. Raman results show the typical fingerprint of CdS in the form of the 1LO and 2LO phonon vibration peaks. The energy bandgaps obtained from optical measurements fall in the range of (2.50–2.59) eV which narrow down to 2.42 eV after annealing, for the different growth voltages used. EDX reveals all the films to be S-rich, with Cd/S ratio of ∼0.9 after annealing.

Topics
  • Deposition
  • grain
  • scanning electron microscopy
  • x-ray diffraction
  • thin film
  • semiconductor
  • annealing
  • Energy-dispersive X-ray spectroscopy
  • tin
  • Raman spectroscopy
  • spectrophotometry