Nanoscale SiOx Tunnel Oxide Deposition Techniques and Their Influence on Cell Parameters of TOPCon Solar Cells

Padi, Siva Parvathi; Khokhar, Muhammad Quddamah; Chowdhury, Sanchari; Cho, Eun‐Chel; Yi, Junsin

doi:10.1007/s42341-021-00356-7

Cited by 14 publications

(12 citation statements)

References 63 publications

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“…TOPCon cell is another promising Si photovoltaic device with a special structure containing an oxide/poly-Si contact at the rear side, giving rise to favorable carrier transport and recombination suppression, as shown in Figure a . In TOPCon cells, an n-type Si wafer is widely used as the absorber.…”

Section: Different Structures Of Si Solar Cells and Perovskite/si Tan...mentioning

confidence: 99%

“…In this design, the emitter is coated on the Si absorber to separate photoinduced charge carriers, and antireflection coating (ARC) is added to reduce light reflection and optical losses on the front side; a dielectric AlO x /SiN x passivation layer is deposited on the rear side to reduce surface recombination, and localized Al–Si contacts are constructed to reduce the contact area between the metal electrode and Si . The TOPCon solar cells contain an ultrathin silicon oxide (SiO 2 ) layer as a tunnel oxide for selective charge transport and a doped poly-Si layer as back ARC, both of which contribute to passivation . HJT solar cells also benefit from the passivating contact which is contributed by hydrogenated amorphous silicon (a-Si:H) layers rather than SiO 2 and poly-Si layers .…”

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confidence: 99%

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Perovskite/Silicon Tandem Solar Cells: Choice of Bottom Devices and Recombination Layers

et al. 2023

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Perovskite/silicon tandem solar cells have been intensively studied in recent years, and their efficiencies have rapidly increased owing to the numerous efforts in this field. A question about which type of silicon solar cell is the most suitable subcell in tandem devices emerges. Herein, three attractive silicon solar cells are summarized, including passivated-emitter rear-cell (PERC), tunnel oxide passivated contact (TOPCon), and heterojunction (HJT) cells. Their structures and features are elucidated for a clear understanding of the mechanism and potential of optimum performance. Moreover, the characteristics and performance of perovskite/silicon tandem cells with PERC, TOPCon, and HJT subcells are contrasted and discussed. The significant contribution of the passivation layer and structure design on both sides to photovoltaic properties of tandem devices is emphasized. Especially, the recombination layer between two subcells is analyzed in depth in terms of material chemistry, light absorption, and charge transport with a review on preparing the optimized structure.

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Section: Different Structures Of Si Solar Cells and Perovskite/si Tan...mentioning

confidence: 99%

mentioning

confidence: 99%

Perovskite/Silicon Tandem Solar Cells: Choice of Bottom Devices and Recombination Layers

et al. 2023

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“…20,21 Thermal oxidation is currently the most widely used in the mass production process design, where the equipment is well developed and processing technologies are easily adapted to the current silicon solar cell fabrication lines. The thin oxide layer can be prepared by a short thermal oxidation (from 1 to 5 min) at a temperature range of between 500 and 600 C. 22 This is the most common way of combining the oxidation process with the poly-Si thin film deposition process in a single lowpressure chemical vapour deposition (LPCVD) tube. 23 In terms of film uniformity, equipment and process development in recent years has enabled a spatial thickness variance of lower than 5% under continuous processing, even for the wafer sizes up to 210 mm side length.…”

Section: Tunnel Oxide Layer Formationmentioning

confidence: 99%

“…The thin oxide layer can be prepared by a short thermal oxidation (from 1 to 5 min) at a temperature range of between 500 and 600°C 22 . This is the most common way of combining the oxidation process with the poly‐Si thin film deposition process in a single low‐pressure chemical vapour deposition (LPCVD) tube 23 .…”

Section: Topcon Process and Structurementioning

confidence: 99%

Mass production of crystalline silicon solar cells with polysilicon‐based passivating contacts: An industrial perspective

Zhang¹,

Dumbrell²,

Li³

et al. 2022

Progress in Photovoltaics

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Silicon solar cells that employ passivating contacts featuring a heavily doped polysilicon layer on a thin silicon oxide (TOPCon) have been demonstrated to facilitate remarkably high cell efficiencies, amongst the highest achieved to date using a single junction on a silicon substrate. Importantly, it has been shown that the polysiliconbased passivating contacts have a high degree of compatibility with existing mass production processes and toolsets, making them an attractive choice for photovoltaic (PV) cell manufacturers to increase the efficiency of their products. With several large PV manufacturers recently announcing plans to push the TOPCon technology into mass production, we review the significant industrial research and development activities that have been undertaken to push the boundaries of the technology and optimise its integration into the existing mass production pipeline. From an industrial perspective, TOPCon fabrication methodology options as well as necessary technological advances in front-side fabrication, cell metallisation and module integration are discussed. The TOPCon technology development is contextualised in terms of larger trends in PV manufacturing, and we look towards the direction of future industrial development.

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“…The only currently recorded deficiency of solar energy collection is its low efficiency of energy collecting devices. Currently available PV modules are between 15% to 20% efficient, and the most technologically advanced are up to 26% efficient [88]. A relatively low efficiency affects the surface of energy generating panels.…”

Section: Literature Reviewmentioning

confidence: 99%

Photovoltaic Solar Energy from Urban Sprawl: Potential for Poland

et al. 2021

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Urban sprawl is a process that shapes contemporary urban spaces. Generally, this process is associated with negative effects due to the generation of high costs. However, not all the effects of urban sprawl should be considered in the context of the increasing costs of the use of space; some of them should be regarded as cost cutting factors, for example, the possibility of the use of roofed areas in generating energy from sunlight. Solar energy is believed to be one of the sources of clean energy that reduce pollution and greenhouse gas emissions into the atmosphere. However, solar energy generation necessitates the development of large areas for the purpose of installing photovoltaic modules and substantial funds for creating large solar farms. For this reason, a significant role in state energy policies is played by small dispersed installations mounted on the roofs of buildings. There is a gap in existing research on the assessment of urban sprawl in terms of the potential use of rooftops for solar installations in suburban areas. This research gap has not yet been filled, either conceptually and methodologically. Hence, the contribution of the research to the development of the current state of knowledge involves the identification of economic and environmental benefits of usually negatively perceived urban sprawl. The proposal of a method for the identification of suburban housing potential for solar energy generation constitutes another addition to the state of knowledge. The main objective of this article is to analyse the energy generating potential of buildings located in suburban and urban areas characterised by the confirmed occurrence of urban sprawl phenomena. CityGML data were used to conduct an analysis of the exposure of roofs to sunlight using algorithms based on vector data. The authors estimated the dynamics of changes in time and referred the existing photovoltaic installations to the total potential of a selected area. The use of the energy potential of the analysed roofs of buildings was used to evaluate the external costs and benefits of spatial planning. The discussion presented the current conditions of the energy sector and energy policies in Poland and the EU. In addition, recommendations were proposed for local spatial policies concerning the mitigation of the effects of suburbanization in the context of developing the system of PV micro-installations.

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Nanoscale SiOx Tunnel Oxide Deposition Techniques and Their Influence on Cell Parameters of TOPCon Solar Cells

Cited by 14 publications

References 63 publications

Perovskite/Silicon Tandem Solar Cells: Choice of Bottom Devices and Recombination Layers

Perovskite/Silicon Tandem Solar Cells: Choice of Bottom Devices and Recombination Layers

Mass production of crystalline silicon solar cells with polysilicon‐based passivating contacts: An industrial perspective

Photovoltaic Solar Energy from Urban Sprawl: Potential for Poland

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