26.7% Efficient 4-Terminal Perovskite–Silicon Tandem Solar Cell Composed of a High-Performance Semitransparent Perovskite Cell and a Doped Poly-Si/SiO_x Passivating Contact Silicon Cell

Journal Article · Thu Jan 16 00:00:00 EST 2020 · IEEE Journal of Photovoltaics

DOI:https://doi.org/10.1109/jphotov.2019.2963564· OSTI ID:1606124

Rohatgi, Ajeet  ^[1]; Zhu, Kai  ^[2]; Tong, Jinhui ^[2]; Kim, Dong Hoe ^[3]; Reichmanis, Elsa  ^[1]; Rounsaville, Brian ^[1]; Prakash, Vivek ^[1]; Ok, Young-Woo  ^[1]

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1. Georgia Inst. of Technology, Atlanta, GA (United States)
2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
3. Sejong Univ., Seoul (South Korea)

The rapid rise in single-junction perovskite solar cell (PSC) efficiencies, tunable bandgap, and low-cost solution processability make PSCs an attractive candidate for tandems with Si bottom cells. However, the challenge is to fabricate a high-performance semitransparent perovskite top cell in combination with an appropriate silicon bottom cell with high response to long wavelength photons that are filtered through the perovskite top cell. Currently, semitransparent perovskite cells show much lower performance compared with their opaque counterparts, while high-performance silicon bottom cells, such as heterojunction with intrinsic thin layer and interdigitated back contact, may be too expensive to meet the cost and efficiency targets for commercial viability. Here, we demonstrate a 26.7% perovskite-Si four terminal (4T) tandem cell comprising a highly efficient 17.8% CsFAMAPbIBr semitransparent, 1.63-eV bandgap perovskite top cell, and a =22% efficiency n-type Si bottom cell fabricated with a conventional boron diffused emitter on the front and carrier selective n + poly-Si/SiO_x passivated contact on the rear. This is among the highest efficiency perovskite/Si 4T tandems published to date and represents the first report of the use of the high temperature-resistant single side n-tunnel oxide passivated contact Si cell in a 4T configuration.

• Research Organization: National Renewable Energy Lab. (NREL), Golden, CO (United States); Georgia Institute of Technology, Atlanta, GA (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE); National Research Foundation of Korea (NRF)
• Grant/Contract Number: AC36-08GO28308; 2017R1A4A1015022; EE0007554
• OSTI ID: 1606124
• Alternate ID(s): OSTI ID: 1893727; OSTI ID: 1893899
• Report Number(s): NREL/JA-5900-75684; MainId:17320; UUID:7018f1ad-e920-ea11-9c2a-ac162d87dfe5; MainAdminID:5798
• Journal Information: IEEE Journal of Photovoltaics, Vol. 10, Issue 2; ISSN 2156-3381
• Publisher: IEEE
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
four terminal (4T) tandem solar cell
passivating contact Si solar cells
perovskite
tunnel oxide passivated contact (TOPCon) cell