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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Amalu, Dr Emeka

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in Cooperation with on an Cooperation-Score of 37%

Topics

Publications (19/19 displayed)

  • 2024Mineral wastes1citations
  • 2024Effect of Creep, Fatigue and Random Vibration on the Integrity of Solder Joints in BGA Package8citations
  • 2024Critical methods of geopolymer feedstocks activation for suitable industrial applications1citations
  • 2024Critical solder joint in insulated gate bipolar transistors (IGBT) power module for improved mechanical reliability13citations
  • 2023Characterising Solder Materials from Random Vibration Response of Their Interconnects in BGA Packaging12citations
  • 2023Effects of Reflow Profile and Miniaturisation on the Integrity of Solder Joints in Surface Mount Chip Resistors2citations
  • 2021Thermal fatigue life of ball grid array (BGA) solder joints made from different alloy compositions82citations
  • 2020Comparing and benchmarking fatigue behaviours of various SAC solders under thermo-mechanical loading13citations
  • 2019Creep damage of BGA solder interconnects subjected to thermal cycling and isothermal ageing10citations
  • 20193D printing of intricate sand cores for complex copper castingscitations
  • 2018Effect of Temperature on Conductivity of PLA-Carbon 3D Printed Components.citations
  • 2016Effects of component stand-off height on reliability of solder joints in assembled electronic componentcitations
  • 2015Effect of intermetallic compounds on thermo-mechanical reliability of lead-free solder joints in solar cell assemblycitations
  • 2015A review of interconnection technologies for improved crystalline silicon solar cell photovoltaic module assembly134citations
  • 2012High-temperature fatigue life of flip chip lead-free solder joints at varying component stand-off height15citations
  • 2012High temperature reliability of lead-free solder joints in a flip chip assembly58citations
  • 2012Thermal management materials for electronic control unit5citations
  • 2012Prediction of damage and fatigue life of high-temperature flip chip assembly interconnections at operations18citations
  • 2011Effect of solder joint integrity on the thermal performance of a TEC for a 980nm pump laser modulecitations

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Kehinde, O.
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Hughes, David
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Depiver, Joshua A.
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Mallik, Sabuj
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Kehinde, Oluyemi
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Hughes, David J.
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Nebo, Sunday E.
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Njoku, Jude E.
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Ekere, Ndy
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Ekpu, Mathias
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Zarmai, M. T.
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Oduoza, C. F.
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Ekere, N. N.
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Ekere, Ndy N.
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Bhatti, R. S.
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Mallik, S.
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Takyi, G.
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Co-Authors (by relevance)

  • Kehinde, O.
  • Hughes, David
  • Depiver, Joshua A.
  • Mallik, Sabuj
  • Kehinde, Oluyemi
  • Hughes, David J.
  • Nebo, Sunday E.
  • Njoku, Jude E.
  • Ekere, Ndy
  • Ekpu, Mathias
  • Ogbodo, Eugene A.
  • Depiver, Joshua Adeniyi
  • Harmanto, Dani
  • Sutherland, Luke
  • Bhatti, Raj
  • Ogunsemi, B.
  • Zarmai, M. T.
  • Oduoza, C. F.
  • Ekere, N. N.
  • Ekere, Ndy N.
  • Otiaba, K. C.
  • Bhatti, R. S.
  • Mallik, S.
  • Takyi, G.
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article

Effect of intermetallic compounds on thermo-mechanical reliability of lead-free solder joints in solar cell assembly

  • Zarmai, M. T.
  • Oduoza, C. F.
  • Amalu, Dr Emeka
  • Ekere, N. N.
Abstract

The solder joints in crystalline silicon solar cell assembly undergo thermo-mechanical degradation during the device lifetime. The degradation is accelerated by the formation and growth of intermetallic compound, IMC, in a solder joint which contains copper and tin as alloying elements of the solder. This investigation quantifies the contribution of the presence of IMC in the joints on the reliability of the assembly. The study employs finite element modelling (FEM) to simulate the nonlinear deformation of SnAgCu solder joints in two models of crystalline silicon solar cell assembly. One of the models contains IMC in the interface joints between solder and copper ribbon while the other, which is the control, does not contain IMC in the joints. The degradation of the solder material is simulated using Garofalo-Arrhenius creep model. The geometric models were subjected to accelerated thermal cycling utilising IEC 61215 standard for photovoltaic panels. Analysis of the results of the creep strain profiles of the two models indicate that the deformation amplitude in the solder joint containing IMC is higher than that in the solder joint containing solder only. Similarly, it can be observed from the plot of strain energy density against load step that the solder joint containing solder+IMC have considerable higher strain energy density compared to solder only joint. This infers that the presence of IMC significantly impacts the thermomechanical reliability of the assembly joints. The results also demonstrate that IMC decreases the mean-time-to failure (MTTF) of the assembly joints.

Topics
  • density
  • impedance spectroscopy
  • compound
  • energy density
  • copper
  • Silicon
  • intermetallic
  • tin
  • creep
  • ion-exclusion chromatography
  • ion-exchange chromatography