Small-area p-type PERC Silicon Solar Cells for Tandem Applications

Thway, Maung; Liu, Tianyuan; Huang, Mei; Ke, Changjian; Ng, Xin Ren; Balaji, Nagarajan; Yan, Xiaoxiao; Duttagupta, Shubham; Stangl, Rolf; Chua, Soo Jin; Aberle, Armin G.; Lin, Fen

doi:10.1364/ose.2018.ot3c.4

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“…The PERC cell was optimized to function as a bottom cell in a four terminal tandem. 39 The measured bottom cell efficiency was 6.70% when filtered with the perovskite top-cell, which is close to our calculated value based on the transmittance of the perovskite filter (refer to Eq. S1&S2, SI).…”

Section: Main Textsupporting

confidence: 89%

“…We fabricated a p -type passivated emitter rear contact (PERC) bottom cell, which is commonly used in industry, with an unfiltered efficiency of 18.5% (Table ). The PERC cell was optimized to function as a bottom cell in a four-terminal tandem . The measured bottom cell efficiency was 6.70% when filtered with the perovskite top cell, which is close to our calculated value based on the transmittance of the perovskite filter (see eqs S1 and S2 in the Supporting Information).…”

supporting

confidence: 80%

“…These semi-transparent devices are used as top-cells in four-terminal tandems with two types of silicon bottom cells that are industrially-relevant: p-type passivated emitter rear contact (PERC) and n-type silicon cells with polycrystalline silicon passivation. 39,40 We chose to focus on CuO x rather than NiO x because Cu 2 O can be grown at temperatures below 200 °C by chemical vapor deposition (CVD) or atomic layer deposition (ALD), 41 which are soft growth methods, unlike sputtering. We grew the CuO x layers by atmospheric pressure chemical vapor deposition (AP-CVD).…”

Section: Main Textmentioning

confidence: 99%

“…We fabricated a p-type passivated emitter rear content (PERC) bottom cell, which is commonly used in industry, with an efficiency of 18.5% (Table 1). The PERC cell is optimised to function as a bottom cell in a four terminal tandem 43 . The sunlight was filtered using 4 cm 2 semi-transparent perovskite devices, and the measured bottom cell efficiency was 6.70%, which is close to our calculated value based on the transmittance of the perovskite filter.…”

Section: Thementioning

confidence: 99%

“…We test the CuO x layer in semitransparent n - i - p structured devices and focus on understanding whether sputter damage to the perovskite and organic hole transport layers can be further reduced through thermalized deposition of the TCO, while not sacrificing the TCO material’s carrier and optical properties. These semitransparent devices are used as top cells in four-terminal tandems with two types of silicon bottom cells that are industrially relevant: p -type passivated emitter rear contact (PERC) and n -type silicon cells with polycrystalline silicon passivation. , …”

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confidence: 99%

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Rapid Vapor-Phase Deposition of High-Mobility p-Type Buffer Layers on Perovskite Photovoltaics for Efficient Semitransparent Devices

et al. 2020

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Perovskite solar cells (PSCs) with transparent electrodes can be integrated with existing solar panels in tandem configurations to increase the power conversion efficiency. A critical layer in semi-transparent PSCs is the inorganic buffer layer, which protects the PSC against damage when the transparent electrode is sputtered on top. The development of n-i-p structured semi-transparent PSCs has been hampered by the lack of suitable p-type buffer layers. In this work we develop a ptype CuO x buffer layer, which can be grown uniformly over the perovskite device without damaging the perovskite or organic hole transport layers. The CuO x layer has high hole mobility (4.3 ± 2 cm 2 V -1 s -1 ), high transmittance (>95%), and a suitable ionization potential for hole extraction (5.3 ± 0.2 eV). Semi-transparent PSCs with efficiencies up to 16.7% are achieved using the CuO x buffer layer. Our work demonstrates a new approach to integrate n-i-p structured PSCs into tandem configurations, as well as enable the development of other devices that need high quality, protective p-type layers.

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confidence: 89%

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confidence: 80%