Publications by authors named "Kelechi C Nwambaekwe"

Article Synopsis
  • New materials are needed to capture solar energy effectively, and rare-earth oxychalcogenides are being explored as up/down-conversion materials to enhance photovoltaic (PV) performance.
  • Researchers synthesized novel yttrium oxyselenide (YOSe) nanomaterials, including doped versions with terbium (Tb) and europium (Eu), through a microwave-assisted method, leading to improved structure and conductivity.
  • The doped nanomaterials demonstrated notable luminescence and efficiency improvements in PV applications, achieving power conversion efficiencies of 0.25% for YOSe, 0.67% for YOSe:Tb, and 1.20% for YOSe:Eu, indicating their potential to enhance the performance
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The high incidence of tuberculosis (TB) infection is of great concern world-wide. The traditional TB diagnostic techniques are not ideal for TB diagnosis in resource-poor countries. This is due to their high complexity, expensive nature, long time duration, poor sensitivity and specificity, as well as their requirement for sophisticated laboratories with special biosafety conditions.

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Metal chalcogenides such as copper zinc tin sulfide (CZTS) have been intensively studied as potential photovoltaic cell materials, but their viability have been marred by crystal defects and low open circuit potential () deficit, which affected their energy conversion efficiency. Strategies to improve on the properties of this material such as alloying with other elements have been explored and have yielded promising results. Here, we report the synthesis of CZTS and the partial substitution of S with Te via anion hot injection synthesis method to form a solid solution of a novel kesterite nanomaterial, namely, copper zinc tin sulfide telluride (CZTSTe).

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