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Design Analysis of Heterojunction Solar Cells with Aligned AZO Nanorods Embedded in p-type Si wafer

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Abstract

Higher price-per-watt of silicon (Si) solar cells is still the main bottleneck in their widespread use for power generation due to their expensive manufacturing process. The n-type zinc oxide (n-ZnO) and p-type Si (p-Si) based single heterojunction solar cell is one of the several methods being tried to replace conventional Si single homojunction solar cell technology. In this work, we have explored the possibility of producing photovoltaic materials by employing RF sputtering and hydrothermal technologies. Conductivity of ZnO nanorods has been increased by aluminium (Al) doping. The advantages of using Al doped ZnO (AZO) nanorods (NRs) have been investigated. The integrated reflectance (IR) has been found to be only ~2.86%. Hence, the short circuit current density (Jsc) has been increased by minimizing the reflection loss of solar cells. AZO NR array have been developed over several large area (3″ × 3″) textured p-Si wafers to confirm the repeatability. The maximum efficiency of AZO NRs/Si solar cell of 0.8 cm2 area has been found to be 6.25% for textured p-type Si wafer which is much higher than reported hitherto for this type of solar cell. A simple, low temperature, low cost procedure is thus being proposed, which has the potential of attaining lower cost of production of heterojunction silicon solar cells.

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Acknowledgements

This work has been supported by the Ministry of New and Renewable Energy (MNRE) (31/40/2010-11/PVSE), Govt. of India, Department of Science and Technology (DST) (DST/TM/CERI/D09 (G)). The authors are grateful to Prof. A.K. Barua for his enormous support and guidance. The authors are also thankful to Prof. H Saha, Principal Investigator of the project for his encouragement and help.

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Authors and Affiliations

  1. Centre of Excellence for Green Energy and Sensor Systems, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, 711103, India

    Jayasree Roy Sharma, Gourab Das, Sukanta Bose & Sumita Mukhopadhyay

  2. Madanapalle Institute of Technology and Science, P.O. 14, Kadiri Road, Vill.- Angallu, Madanapalle, Dist. - Chittoor, Andhra Pradesh, 517325, India

    Arijit Bardhan Roy

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  1. Jayasree Roy Sharma
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  2. Gourab Das
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  3. Arijit Bardhan Roy
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  4. Sukanta Bose
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  5. Sumita Mukhopadhyay
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Correspondence to Sumita Mukhopadhyay.

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Sharma, J.R., Das, G., Roy, A.B. et al. Design Analysis of Heterojunction Solar Cells with Aligned AZO Nanorods Embedded in p-type Si wafer. Silicon 12, 305–316 (2020). https://doi.org/10.1007/s12633-019-00134-4

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  • DOI: https://doi.org/10.1007/s12633-019-00134-4

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