Progress on the intrinsic a-Si:H films for interface passivation of silicon heterojunction solar cells: A review

Panigrahi, Jagannath; Komarala, Vamsi K.

doi:10.1016/j.jnoncrysol.2021.121166

Cited by 32 publications

(25 citation statements)

References 117 publications

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“…Hydrogenated amorphous silicon thin films (a-Si:H) with different compositions, structures, and dopants may present a broad range of properties depending on the goal. They are, therefore, potential candidates for use in a diverse set of fields, including photovoltaic studies, − particle detectors, and thin-film transistors (TFTs) . Recently, this material was also reported as a stable, potential solid lubricant at the macroscale and under high temperatures (up to 600 °C), with results close to superlubricity.…”

Section: Introductionmentioning

confidence: 99%

Nanotribology of Hydrogenated Amorphous Silicon: Sliding-Dependent Friction and Implications for Nanoelectromechanical Systems

Leidens

Michels

Perotti

et al. 2022

ACS Appl. Nano Mater.

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Silicon-based materials are widely applied in micro-and nanoscale devices, such as micro-and nano-electromechanical systems (MEMs and NEMs, respectively). However, the nanofriction behavior of such materials is still an issue that influences or hinders some applications. Recently, a sliding-dependent friction mechanism was accessed, by simulation of hydrogenated silicon surfaces, in which friction forces increase during sliding. The experimental evaluation of this phenomenon is still lacking, as well as the confirmation of such a behavior in ambient air conditions, related to the current application. Here, the nanotribology of hydrogenated amorphous silicon (a-Si:H) was experimentally studied under repeated scanning. As an overall analysis, friction increases during sliding, without wear. After separation and new contact, the friction force recovers an intermediate value and increases again, until reaching an intermediate steady state. The mechanism may be related to the successive creation and breaking of bonds at the interface. When the contact is ceased, the dangling bonds created at both surfaces after separation may be repassivated. Moreover, the relationship of this behavior with the photoactivity of the material was tested. If an external light source is added during the scanning, it only changes the results before the stabilization of the interface. This detailed experimental study might promote the broader nanoapplication of the material, addressing the current failures and suggesting new devices based on the anomalous behavior.

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Section: Introductionmentioning

confidence: 99%

Nanotribology of Hydrogenated Amorphous Silicon: Sliding-Dependent Friction and Implications for Nanoelectromechanical Systems

Leidens

Michels

Perotti

et al. 2022

ACS Appl. Nano Mater.

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“…A band diagram of the standard HJT solar cell is sketched in Fig. 1b [21].The i-a-Si:H film, as a buffer layer, enables a low c-Si surface recombination via excellent chemical passivation [22][23][24]. The n-and p-type-doped a-Si:H films were deposited on top of the buffer layers to form electron and hole selective contact with the c-Si absorber and TCOs, which is due to the proper work function difference between the doped a-Si:H and c-Si absorbers [25,26].…”

Section: Hjt Solar Cellsmentioning

confidence: 99%

Review on Metallization Approaches for High-Efficiency Silicon Heterojunction Solar Cells

Zeng

Peng

Wang

et al. 2022

Trans. Tianjin Univ.

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Crystalline silicon (c-Si) heterojunction (HJT) solar cells are one of the promising technologies for next-generation industrial high-efficiency silicon solar cells, and many efforts in transferring this technology to high-volume manufacturing in the photovoltaic (PV) industry are currently ongoing. Metallization is of vital importance to the PV performance and long-term reliability of HJT solar cells. In this review, we summarize the development status of metallization approaches for high-efficiency HJT solar cells. For conventional screen printing technology, to avoid the degradation of the passivation properties of the amorphous silicon layer, a low-temperature-cured (< 250 ℃) paste and process are needed. This process, in turn, leads to high line/contact resistances and high paste costs. To improve the conductivity of electrodes and reduce the metallization cost, multi-busbar, fine-line printing, and low-temperature-cured silver-coated copper pastes have been developed. In addition, several potential metallization technologies for HJT solar cells, such as the Smart Wire Contacting Technology, pattern transfer printing, inkjet/FlexTrailprinting, and copper electroplating, are discussed in detail. Based on the summary, the potential and challenges of these metallization technologies for HJT solar cells are analyzed.

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“…become the main material for the manufacture of photovoltaic devices, being today the most commercialized photovoltaic cell. [17][18][19] Silicon-based photovoltaic devices can be divided into two classes, monocrystalline silicon and polycrystalline, in which they differ by the form of manufacture. Polycrystalline silicon requires less rigor in production, reducing expenditure, but the lower uniformity of the structure results in a decreased flow of electrons.…”

Section: Historical Contextmentioning

confidence: 99%

Perovskite and Polymeric Solar Cells: A Comparison of Advances and Key Challenges

Santos

Marques

2022

Energy Tech

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One of the most widely used energy sources nowadays is nonrenewable, but the excessive consumption of these resources leads to environmental issues. Therefore, renewable energy sources have received much attention, including photovoltaic energy. A novel technology known as “third‐generation solar cells” is being studied, and in this class, the polymeric solar cells (PSCs) and the perovskite solar cells (PVSKs) can be highlighted. Several researchers are trying to find new ways to improve the energy conversion efficiency (PCE) and long‐term stability of these devices. In particular, PVSK has already demonstrated high PCE, but there is still a long way to go to develop more stable and better processable devices for large‐scale production. In the case of PSC, processability is a positive factor since its flexible films have great mechanical stability and can be processed in roll‐by‐roll systems. However, efficiency is still a challenge for researchers. Nevertheless, both types of devices are good alternatives for silicon cell substitution. However, further studies are needed to address the inherent problems of each device technology and move to large‐scale production.

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Progress on the intrinsic a-Si:H films for interface passivation of silicon heterojunction solar cells: A review

Cited by 32 publications

References 117 publications

Nanotribology of Hydrogenated Amorphous Silicon: Sliding-Dependent Friction and Implications for Nanoelectromechanical Systems

Nanotribology of Hydrogenated Amorphous Silicon: Sliding-Dependent Friction and Implications for Nanoelectromechanical Systems

Review on Metallization Approaches for High-Efficiency Silicon Heterojunction Solar Cells

Perovskite and Polymeric Solar Cells: A Comparison of Advances and Key Challenges

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