Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.solmat.2018.05.059
Title: monoPoly (TM) cells: Large-area crystalline silicon solar cells with fire-through screen printed contact to doped polysilicon surfaces
Authors: Duttagupta, Shubham 
Nandakumar, Naomi 
Padhamnath, Pradeep 
Buatis, Jamaal Kitz 
Stangl, Rolf 
Aberle, Armin G 
Keywords: Science & Technology
Technology
Physical Sciences
Energy & Fuels
Materials Science, Multidisciplinary
Physics, Applied
Materials Science
Physics
SI
PASSIVATION
EFFICIENCY
Issue Date: 1-Dec-2018
Publisher: ELSEVIER SCIENCE BV
Citation: Duttagupta, Shubham, Nandakumar, Naomi, Padhamnath, Pradeep, Buatis, Jamaal Kitz, Stangl, Rolf, Aberle, Armin G (2018-12-01). monoPoly (TM) cells: Large-area crystalline silicon solar cells with fire-through screen printed contact to doped polysilicon surfaces. SOLAR ENERGY MATERIALS AND SOLAR CELLS 187 : 76-81. ScholarBank@NUS Repository. https://doi.org/10.1016/j.solmat.2018.05.059
Abstract: © 2018 Elsevier B.V. Successful integration of carrier selective contacts (so-called passivated contacts) in p-type and n-type front-and-back contact (FAB) silicon solar cells could lift cell efficiencies to above 24% in mass production. In this work, we introduce one of SERIS’ monoPoly FAB cell structures, which features the monofacial (single-sided) application of a polysilicon (poly-Si) layer. Using industrial tools, doped poly-Si on an ultrathin interface oxide is shown to provide extremely low recombination current density of 4 fA/cm2 and implied open-circuit voltage of about 745 mV that are able to withstand the high-temperature firing process of screen-printed metal contacts. The interface oxide and the doping concentration of the poly-Si film are of great importance for the surface passivation quality and the transport of majority carriers, especially for fire-through screen-printed contacts as used in this work. Our initial pilot-line results show a very promising cell efficiency of 21.4% on large-area (244.3 cm2) n-type monocrystalline wafers with screen-printed and fire-through metal contacts on both sides. A roadmap for nFAB monoPoly cells towards 24% efficiency is presented on the basis of an optimisation of the device architecture and various processing steps.
Source Title: SOLAR ENERGY MATERIALS AND SOLAR CELLS
URI: https://scholarbank.nus.edu.sg/handle/10635/155034
ISSN: 0927-0248
1879-3398
DOI: 10.1016/j.solmat.2018.05.059
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