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The influence of emitter resistance on the electrical parameters of mono- and multicrystalline silicon solar cells

Barbara Swatowska (Department of Electronics, AGH University of Science and Technology, Krakow, Poland)
Piotr Panek (Instytut Metalurgii i Inzynierii Materialowej PAN, Krakow, Poland)
Dagmara Michoń (AGH University of Science and Technology, Krakow, Poland)
Aleksandra Drygała (Institute of Engineering Materials and Biomaterials, Politechnika Slaska, Gliwice, Poland)

Microelectronics International

ISSN: 1356-5362

Article publication date: 20 June 2019

Issue publication date: 12 July 2019

Abstract

Purpose

The purpose of this study was the comparison and analysis of the electrical parameters of two kinds of silicon solar cells (mono- and multicrystalline) of different emitter resistance.

Design/methodology/approach

By controlling of diffusion parameters, silicon mono- (Cz-Si) and multicrystalline (mc-Si) solar cells with different emitter resistance values were produced – 22 and 48 Ω/□. On the basis of current-voltage measurements of cells and contact resistance mapping, the properties of final solar cells based on two different materials were compared. Additionally, the influence of temperature on PV cells efficiency and open circuit voltage (Uoc) were investigated. The PC1D simulation was useful to determine spectral dependence of external quantum efficiency of solar cells with different emitter resistance. The silicon solar cells of 25 cm2 area and 240 µm thickness were investigated.

Findings

Considering the all stages of cell technology, the best structure is silicon solar cell with sheet resistance (Rsheet) of 45-48 Ω/□. Producing of an emitter with this resistance allowed to obtain cells with a fill factor between 0.725 and 0.758, Uoc between 585 and 612 mV, short circuit current (Isc) between 724 and 820 mA.

Originality/value

Measurements and analysis confirmed that mono- and multicrystalline silicon solar cells with 48 Ω/□ emitter resistance have better parameters than cells with Rsheet of 22 Ω/□. The contact resistance is the highest for mc-Si with Rsheet of 48 Ω/□ and reaches the value 3.8 Ωcm.

Keywords

Acknowledgements

This work has been co-financed by the National Science Centre (NCN) in Poland, contract no. 2018/02/X/ST5/01587 (AGH grant number 18.18.230.04300) and by the Polish Ministry of Science and Higher Education under subvention funds for the Department of Electronics of AGH University of Science and Technology (AGH grant number 16.16.230.434).

Citation

Swatowska, B., Panek, P., Michoń, D. and Drygała, A. (2019), "The influence of emitter resistance on the electrical parameters of mono- and multicrystalline silicon solar cells", Microelectronics International, Vol. 36 No. 3, pp. 90-94. https://doi.org/10.1108/MI-04-2019-0019

Publisher

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Emerald Publishing Limited

Copyright © 2019, Emerald Publishing Limited