Design, development and analysis of large-area industrial silicon solar cells featuring a full area polysilicon based passivating contact on the rear and selective passivating contacts on the front

Padhamnath, Pradeep; Choi, Wook-Jin; De Luna, Gabby; Arcebal, John Derek; Rohatgi, Ajeet

doi:10.1016/j.solmat.2023.112351

Design, development and analysis of large-area industrial silicon solar cells featuring a full area polysilicon based passivating contact on the rear and selective passivating contacts on the front

Journal Article · Fri Apr 28 00:00:00 EDT 2023 · Solar Energy Materials and Solar Cells

DOI:https://doi.org/10.1016/j.solmat.2023.112351· OSTI ID:2418641

^[1]; ^[2]; De Luna, Gabby ^[3]; Arcebal, John Derek ^[3]; Rohatgi, Ajeet ^[2]

National Univ. of Singapore (Singapore); Solar Energy Research Institute of Singapore (SERIS) (Singapore); OSTI
Georgia Institute of Technology, Atlanta, GA (United States)
National Univ. of Singapore (Singapore); Solar Energy Research Institute of Singapore (SERIS) (Singapore)

We present SERIS’ biPoly™ technology platform on large-area (M2), n-type rear-junction silicon solar cells featuring selective poly-Si/SiOx based passivated contacts on the front side and full-area poly-Si/SiOx contacts on the rear. The selective poly-Si ‘fingers’ are formed using an industrial ink-jet masking process followed by wet-chemical etching. The metal contacts are formed by an industrial screen-printing process using high-temperature fire-though metal pastes. We obtain excellent passivation on the front and rear surfaces, resulting in iVoc values between 720 mV and 730 mV on unmetallized solar cells. After high-temperature metallization, we achieve 22% efficiency on solar cells with selective poly-Si fingers on the front. We further develop the model for biPoly™ solar cells and with the help of a detailed loss analysis and simulations, identify the various loss components to identify the device modifications required for efficiency improvements.

View Accepted Manuscript (DOE)

Research Organization:: Georgia Institute of Technology, Atlanta, GA (United States); Arizona State Univ., Tempe, AZ (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office

Grant/Contract Number:: EE0008562; EE0008975; EE0009350

OSTI ID:: 2418641

Alternate ID(s):: OSTI ID: 2483312
OSTI ID: 1999819

Journal Information:: Solar Energy Materials and Solar Cells, Journal Name: Solar Energy Materials and Solar Cells Journal Issue: C Vol. 256; ISSN 0927-0248

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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