ZnO/Si Heterojunction Solar Cell

Created by: Babar Hussain

For further uptake in the solar cell industry, n-ZnO/p-Si single heterojunction solar cell drew much attention of research community in recent years. This study reports the influence of bandgap and/or electron affinity tuning of zinc oxide on the performance of n-ZnO/p-Si single heterojunction photovoltaic cell using PC1D simulations. The simulations results reveal that the open circuit voltage and fill factor can be improved significantly by optimizing valence-band and conduction-band off-sets by engineering bandgap and electron affinity of zinc oxide. The overall conversion efficiency of more than 20.3% can be achieved without additional cost or any change in device structure. It has been found that the improvement in efficiency is mainly due to reduction in conduction band offset that has a significant influence on minority carrier current.

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Schematic of the n-ZnO/p-Si single heterojunction solar cell structure

Schematic of the n-ZnO/p-Si single heterojunction solar cell structure.

 

Schematic diagram of n-ZnO/p-Si heterojunction band-bending. χ denotes electron affinity of the material mentioned in the subscript

Schematic diagram of n-ZnO/p-Si heterojunction band-bending. χ denotes electron affinity of the material mentioned in the subscript.

 

 

Influence of electron affinity of ZnO (bandgap: 3.27 eV) on the efficiency of n-ZnO/p-Si heterojunction solar cell using PC1D simulations

Influence of electron affinity of ZnO (bandgap: 3.27 eV) on the efficiency of n-ZnO/p-Si heterojunction solar cell using PC1D simulations.

 

 

Change in overall conversion efficiency of n-ZnO/p-Si solar cell with modification of bandgap value of ZnO for three different values of electron affinity (EA). Few data points have been interpolated because numerical solution was not converging for those points in PC1D.

 

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Cite this article

Babar, Hussain. ZnO/Si Heterojunction Solar Cell, Encyclopedia, 2019, v2, Available online: https://encyclopedia.pub/126