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Optimization and performance enhancement of InP/CIGS/CuI solar cell using bandgap grading

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Abstract

This paper presents a high performing Cu(In1 − xGax)Se2 (CIGS) based solar cell that uses naturally abundant and non-toxic InP (indium phosphide) as an electron transport layer and CuI (copper iodide) as a hole transport layer. These materials, InP and CuI, are better replacements for toxic material based solar cells. The proposed structure comprises a glass substrate/n-ZnO (Zinc oxide)/n-InP/p-CIGS/p-CuI/metal electrode. A graded CIGS layer (i.e. varying energy band gap and electron affinity) is used in this structure for a better harvesting of broad spectrum of solar energy. The proposed PV cell is optimized for different band gap grading of CIGS layer to enhance the performance of the cell. For further optimization of the proposed cell, thickness, doping concentration, and defect density of different layers are varied. After optimization, the proposed cell shows a maximum power conversion efficiency of 30.50% (Voc = 0.8857 V, Jsc = 39.57 mA cm−2, FF = 87.05%) for 1100 nm thickness of the CIGS layer. The optimized device is further analyzed for various temperatures and resistances (series and shunt). All the simulations are done at room temperature (300 K) using SCAP-1D software.

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Acknowledgements

Authors are thankful to developers (Burgelman and colleagues) of SCAP-1D for providing this software free of charge for research purposes.

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  1. Department of Electronics and Communication Engineering, Madan Mohan Malaviya University of Technology, Gorakhpur, Uttar Pradesh, 273010, India

    Manish Deo & R. K. Chauhan

  2. Department of Electrical and Electronics Engineering, Sershah Engineering College, Sasaram, Bihar, 821113, India

    Manish Kumar

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Deo, M., Chauhan, R.K. & Kumar, M. Optimization and performance enhancement of InP/CIGS/CuI solar cell using bandgap grading. J Opt 53, 1224–1234 (2024). https://doi.org/10.1007/s12596-023-01335-2

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