Choice of the low-temperature sintering Ag paste for a-Si:H/c-Si heterojunction solar cell based on characterizing the electrical performance

Chen, Dongpo; Zhao, Lei; Diao, Hongwei; Zhang, Wenbin; Wei, Guojian; Wang, Wenjing

doi:10.1016/j.jallcom.2014.08.175

Cited by 22 publications

(13 citation statements)

References 17 publications

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“…[ 14 ] However, for the SHJ solar cell, the Ag grid finger is obviously observed to be composed of particles or powders in Figure 2c, since the Ag particles are only bound together by the resin during the curing at about 200 °C. [ 21 ] The low‐temperature curing cannot make Ag particles coalesce together. The state that Ag electrode only adheres on the solar cell surface is also shown clearly.…”

Section: Resultsmentioning

confidence: 99%

Silver Recovery from Amorphous/Crystalline Silicon Heterojunction Solar Cell by Alkaline Chemical Immersion and Pyrolysis

Zhao

Liu

Wen

et al. 2022

Physica Status Solidi (a)

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As a typical kind of high‐efficiency crystalline silicon (c‐Si) solar cell, amorphous/crystalline silicon heterojunction (SHJ) solar cell is stepping into mass production currently. It is of great significance to recover Ag from unqualified, broken, and end‐of‐life (EoL) SHJ solar cells. Herein, a facile method including alkaline chemical immersion and pyrolysis is developed. By immersing the solar cell into a sodium hydroxide (NaOH) aqueous solution for a period of time, Ag electrodes can be peeled off effectively. The increase of the concentration (C s) and the temperature (T s) of the NaOH solution shortens the peeling‐off time (t p) of the electrodes. It is deduced that the heated alkaline environment can accelerate the ester hydrolysis of the cured resin at the contact interface between Ag electrode and transparent conductive oxide (TCO) layer, which weakens the bonding strength of the Ag electrode. After cleaning, drying, and milling, the peeled‐off Ag electrodes are pyrolyzed in the air at 500 °C for 60 min to remove the cured resin completely. As a result, Ag powder is obtained with high purity over 99% and almost without mass loss since it is not involved in any chemical reaction during the whole recovery process.

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Section: Resultsmentioning

confidence: 99%

Silver Recovery from Amorphous/Crystalline Silicon Heterojunction Solar Cell by Alkaline Chemical Immersion and Pyrolysis

Zhao

Liu

Wen

et al. 2022

Physica Status Solidi (a)

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“…The conductive powders of the low-temperature-cured electrode are relatively dispersed, and many voids exist in the electrode bulk. A low-temperature-cured Ag paste consists of metal powders, binder resins, solvents, curing agents, and other additives [41]. Metal powders are the conductive phase, accounting for more than 90% of the paste.…”

Section: Low-temperature-cured Silver Pastementioning

confidence: 99%

“…During the curing process of low-temperature silver pastes, low-boiling-point solvents gradually burn off along with the shrinkage and cross-linking of the resin, and the diffusion of atoms on the surface of Ag nanoparticles will facilitate the connection of Ag microparticles [42,47]. Finally, a dense conductive mesh was formed by a large thermodynamic driving force provided by the resin and molten silver nanoparticles [41,47]. Therefore, the effect of the organic composition in the paste on the conductivity of the low-temperature-cured electrode is also critical.…”

Section: Low-temperature-cured Silver Pastementioning

confidence: 99%

“…Copyright © 2020 The Author(s) the amount of resin should be appropriately reduced under the condition of ensuring adhesion. An optimal combination of resins, solvents, curing agents, and other additives are desired [42], and organic components need to be burned off as low as possible below the curing temperature [41,47]. According to a report from Fusion New Material [48], a bulk resistivity of ~ 4.5 Ω cm could be achieved in 2022.…”

Section: Low-temperature-cured Silver Pastementioning

confidence: 99%

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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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“…In addition, the conductive silver slurry can realize exible interconnection [8]. Because of the above excellent performance, conductive silver paste is widely used in solar cells, exible printed circuit boards, radio frequency identi cation system (RFID), electromagnetic shielding, membrane switches and other devices [9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Tuning the electrical resistivity of conductive silver paste prepared by blending multi-morphologies and micro-nanometers silver powder

Liu

Chen

et al. 2021

J Mater Sci: Mater Electron

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As an important interconnection material in electronics, conductive silver paste has attract much research interest in chip packaging and printed circuit board due to its predominant properties like high conductivity and exible interconnection. In this paper, the silver nanoparticles, the silver sphere particles and ake silver powder are fabricated by various methods. Different proportions of silver powder are selected to prepare micro-silver paste and mn silver paste (fabricated by silver nanoparticles : sphere particles : ake silver powder=1:1:1). Compared to traditional silver paste (containing 80wt% silver), the electrical resistivity of micro-silver paste containing 66.67wt% silver and cured at 200℃ for 45min in air is about (3.31±0.73)×10 -5 Ω•cm when the ratio of sphere particle to ake silver powder is 1:1, the resistance of silver paste doesn't also increase dramatically after bending ten times. The addition of nano-silver particles can reduce the resistivity in lower temperature curing. The folding endurance of mn silver paste is comparable to that of micro-silver paste with sphere : ake=1:1.

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Choice of the low-temperature sintering Ag paste for a-Si:H/c-Si heterojunction solar cell based on characterizing the electrical performance

Cited by 22 publications

References 17 publications

Silver Recovery from Amorphous/Crystalline Silicon Heterojunction Solar Cell by Alkaline Chemical Immersion and Pyrolysis

Silver Recovery from Amorphous/Crystalline Silicon Heterojunction Solar Cell by Alkaline Chemical Immersion and Pyrolysis

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

Tuning the electrical resistivity of conductive silver paste prepared by blending multi-morphologies and micro-nanometers silver powder

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