Amorphous Silicon Thin Film Deposition for Poly-Si/SiO 2 Contact Cells to Minimize Parasitic Absorption in the Near-Infrared Region

Changhyun Lee, Jiyeon Hyun, Jiyeon Nam, Seok-Hyun Jeong, Hoyoung Song, Soohyun Bae, Hyunju Lee, Jaeseung Seol, Donghwan Kim, Yoonmook Kang and Hae-Seok Lee
Additional contact information
Changhyun Lee: Department of Materials Science and Engineering, Korea University, Seoul 02841, Korea
Jiyeon Hyun: Department of Materials Science and Engineering, Korea University, Seoul 02841, Korea
Jiyeon Nam: Department of Materials Science and Engineering, Korea University, Seoul 02841, Korea
Seok-Hyun Jeong: Department of Materials Science and Engineering, Korea University, Seoul 02841, Korea
Hoyoung Song: Department of Materials Science and Engineering, Korea University, Seoul 02841, Korea
Soohyun Bae: Photovoltaics Laboratory, Korea Institute of Energy Research, Daejeon 34129, Korea
Hyunju Lee: Meiji Renewable Energy Laboratory, Meiji University, 1-1-1 Higashimita, Tama-ku, Kawasaki 214-8571, Japan
Jaeseung Seol: Hanwha Q CELLS GmbH, Sonnenallee 17-21, Bitterfeld-Wolfen OT Thalheim, 06766 Bitterfeld-Wolfen, Germany
Donghwan Kim: Department of Materials Science and Engineering, Korea University, Seoul 02841, Korea
Yoonmook Kang: KU-KIST Graduate School of Energy and Environment, Green School, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Korea
Hae-Seok Lee: KU-KIST Graduate School of Energy and Environment, Green School, Korea University, 145, Anam-ro, Seongbuk-gu, Seoul 02841, Korea

Energies, 2021, vol. 14, issue 24, 1-9

Abstract: Tunnel oxide passivated contact (TOPCon) solar cells are key emerging devices in the commercial silicon-solar-cell sector. It is essential to have a suitable bottom cell in perovskite/silicon tandem solar cells for commercial use, given that good candidates boost efficiency through increased voltage. This is due to low recombination loss through the use of polysilicon and tunneling oxides. Here, a thin amorphous silicon layer is proposed to reduce parasitic absorption in the near-infrared region (NIR) in TOPCon solar cells, when used as the bottom cell of a tandem solar-cell system. Lifetime measurements and optical microscopy (OM) revealed that modifying both the timing and temperature of the annealing step to crystalize amorphous silicon to polysilicon can improve solar cell performance. For tandem cell applications, absorption in the NIR was compared using a semitransparent perovskite cell as a filter. Taken together, we confirmed the positive results of thin poly-Si, and expect that this will improve the application of perovskite/silicon tandem solar cells.

Keywords: silicon solar cells; passivated contact; amorphous silicon; tunnel oxide passivated contact (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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