Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.solener.2018.12.052
Title: Investigation of phosphorus diffused back surface field (BSF) in bifacial nFAB solar cells
Authors: Yan, Xia 
Wang, Er-Chien 
Chen, Ning 
Zhang, Lin
Gong, Xinxin
Zhang, Xinyu
Duttagupta, Shubham 
Keywords: Science & Technology
Technology
Energy & Fuels
Phosphorus diffusion
n(+) back surface field (BSF)
Dopant profiles
nFAB PERT solar cells
LIGHT-INDUCED DEGRADATION
P-TYPE
POCL3 DIFFUSION
TEMPERATURE
EFFICIENCY
MULTICRYSTALLINE
ILLUMINATION
IMPACT
Issue Date: 1-Feb-2019
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Citation: Yan, Xia, Wang, Er-Chien, Chen, Ning, Zhang, Lin, Gong, Xinxin, Zhang, Xinyu, Duttagupta, Shubham (2019-02-01). Investigation of phosphorus diffused back surface field (BSF) in bifacial nFAB solar cells. SOLAR ENERGY 179 : 335-342. ScholarBank@NUS Repository. https://doi.org/10.1016/j.solener.2018.12.052
Abstract: © 2018 Elsevier Ltd Recently bifacial n-type passivated emitter and rear totally diffused (PERT) monocrystalline silicon solar cells have become one hot spot in photovoltaic (PV) industries, due to good bifaciality, high and stabilised conversion efficiency. Unlike passivated emitter and rear contacts (PERC) structure, n-PERT solar cells require the use of a thin and uniform back surface field (BSF) layer, usually achieved by phosphorus doping. In this study, we optimised the phosphorus diffusion process in terms of surface concentration, junction depth and carrier lifetime. The effects of different phosphorus BSF were investigated by fabricating n-type front and back contact (nFAB) PERT solar cells using industrial feasible approaches and M2 size Czochralski (Cz) monocrystalline Si wafers (6 in., 244.32 cm2). Good phosphorus profiles were developed, which gives low parasitic absorption, low contact resistance and low J0 value when passivated with silicon nitride (SiNx) layer. The optimised champion cell shows a high Voc of 666.5 mV, Jsc of 40.2 mA/cm2, fill factor of 79.9%, efficiency of 21.43% from front side-illumination, together with a good bifaciality factor of 93.0%.
Source Title: SOLAR ENERGY
URI: https://scholarbank.nus.edu.sg/handle/10635/171640
ISSN: 0038092X
DOI: 10.1016/j.solener.2018.12.052
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