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The ideal doping concentration of silicon wafer for single junction hybrid n-Si /PEDOT: PSS solar cells with 3.2% elevated PCE and Voc of 620 mV

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Abstract

Increasing the open circuit voltage of organic/Si-based hetero-junction solar cells (HSCs) is an efficient path for improving its photoelectric conversion efficiency (PCE). Commonly, increasing the doping concentration (ND) for silicon planar substrate could enhance the open circuit voltage (Voc). Comparing with other groups used 1015 cm−3 and other various doping level, the selected 1017 cm−3 doping concentration, as the ideal doping level, could enhance 100 mV for Voc and maximum increase the PCE up to 12.54% without any additional antireflection (AR) layer deposition. To our knowledge, this obtained Voc of 620 mV is a prominent reported value for n-Si/PEDOT: PSS solar devices without any additional antireflection (AR) layer deposition. Meanwhile, this research work clarifies that the PCE is inconsistently increased with the doping concentration, and 1018 cm−3 or higher doping concentration would import internal defects and reduce the PEC. This investigation of silicon wafer’s optimal doping level paves a utility way for easily enhancing the efficiency of industrialized Si/PEDOT: PSS solar cells with low-cost fabrication technologies.

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Acknowledgements

This work was supported by Yunnan University Action Plan of Serve the Yunnan Province (No. 2016MS15), the Construction Fund of International Joint Research Centre for Optoelectronic and Energy Materials by Yunnan Provincial Department of Finance (No. 2017IB033), the Scientific Research Key Fund of Yunnan Provincial Department of Education (No. 2015Z002), The YNU East-Land Scholar Research Fund (No. WX069051), the Applied Basic Research Program of Yunnan Province (No. 2018FD012) and the National Natural Science Foundation of China (No. 11274266).

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Correspondence to Tao Sun or Yu Yang.

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Fang, W., Ni, Z., wang, P. et al. The ideal doping concentration of silicon wafer for single junction hybrid n-Si /PEDOT: PSS solar cells with 3.2% elevated PCE and Voc of 620 mV. J Mater Sci: Mater Electron 31, 6398–6405 (2020). https://doi.org/10.1007/s10854-020-03196-y

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