Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.solmat.2018.12.026
Title: Metal contact recombination in monoPoly (TM) solar cells with screen-printed & fire-through contacts
Authors: Padhamnath, Pradeep 
Wong, Johnson 
Nagarajan, Balaji 
Buatis, Jammaal Kitz 
Ortega, Luisa Ma 
Nandakumar, Naomi 
Khanna, Ankit 
Shanmugam, Vinodh 
Duttagupta, Shubham 
Keywords: Science & Technology
Technology
Physical Sciences
Energy & Fuels
Materials Science, Multidisciplinary
Physics, Applied
Materials Science
Physics
monopoly
Contact-recombination
Passivated contacts
Screen printed
LPCVD
Doped poly-Silicon
PASSIVATED CONTACTS
LOSSES
METALLIZATION
IMPACT
EDGE
Issue Date: 1-Apr-2019
Publisher: ELSEVIER SCIENCE BV
Citation: Padhamnath, Pradeep, Wong, Johnson, Nagarajan, Balaji, Buatis, Jammaal Kitz, Ortega, Luisa Ma, Nandakumar, Naomi, Khanna, Ankit, Shanmugam, Vinodh, Duttagupta, Shubham (2019-04-01). Metal contact recombination in monoPoly (TM) solar cells with screen-printed & fire-through contacts. SOLAR ENERGY MATERIALS AND SOLAR CELLS 192 : 109-116. ScholarBank@NUS Repository. https://doi.org/10.1016/j.solmat.2018.12.026
Abstract: © 2018 Elsevier B.V. We present a detailed analysis of the contact properties with screen printed fire-through (FT) metal pastes on phosphorus doped (n+) polysilicon (poly-Si) layers. Two different pastes are evaluated for their contact resistivity and contact recombination on n+ doped poly-Si and on n+ doped c-Si. We present excellent contact resistivity (ρc) values ~ 1.5 mΩ-cm2 measured by the transfer length method (TLM) for metal contacts with doped poly-Si layer. The recombination at the metallized contacts is evaluated by analyzing the photoluminescence of the samples together with the Griddler software. In this work, we report ultra-low saturation current density values of 35 fA/cm2 under the metal contacts. We demonstrate that solar cells with a rear passivated contact show an average + 16 mV improvement in cell open circuit voltage as compared to the standard cells when using well-suited rear metal pastes. Efficiency of 21.8% is reported for cells printed with the best performing paste on large-area (244.3 cm2) commercially available n-type Czochralski grown Si wafers.
Source Title: SOLAR ENERGY MATERIALS AND SOLAR CELLS
URI: https://scholarbank.nus.edu.sg/handle/10635/155032
ISSN: 0927-0248
1879-3398
DOI: 10.1016/j.solmat.2018.12.026
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