Understanding the uniqueness of the inkjet metallization of multicrystalline silicon solar cell

Ebong, Abasifreke

doi:10.7567/jjap.54.08kd24

Cited by 3 publications

(3 citation statements)

References 24 publications

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“…To this end, various efforts have been made. [1][2][3][4][5][6][7] Nomura and coworkers successfully ejected ink droplets whose viscosity was 100 mPa s using an ultrasonic inkjet system that ejects ink droplets by using a focused ultrasound. [8][9][10][11] This model focuses the ultrasonic waves emitted from the ultrasonic vibrator in the vicinity of the nozzle liquid surface and ejects ink droplets by the pressure of the sound wave.…”

Section: Introductionmentioning

confidence: 99%

Simulation of a liquid droplet ejection device using multi-actuator

Yoshino¹,

Yasuda²,

Tanuma³

2016

Jpn. J. Appl. Phys.

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An equivalent circuit model for a liquid droplet ejection device using a multiactuator has been developed. The equivalent circuit was simplified using a gyrator in the synthesis of the outputs of many elements. The simulation was performed for an inkjet head having three piezoelectric elements using MATLAB/Simulink. In this model, the pressure chamber is filled with a Newtonian fluid. For this reason, the model assumed only the resistance component of the pressure chamber and the nozzle as a load. Furthermore, since the resistance component of the inlet is much larger than that of the nozzle, it is not considered in this model. As a result, by providing a time difference between the driving signals of the piezoelectric elements, we found that the pressure of the ink chamber could be arbitrarily controlled. By this model, it becomes possible to control the pressure in the ink chamber of the inkjet head required for the ejection of various inks.

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Section: Introductionmentioning

confidence: 99%

Simulation of a liquid droplet ejection device using multi-actuator

Yoshino¹,

Yasuda²,

Tanuma³

2016

Jpn. J. Appl. Phys.

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“…It offers quick and mask free design changes for customization, as well as a simple process without wasting materials in the screens, and finally a high print resolution. During the past few years various research groups demonstrated that ink jet printing is a possible technology to print the metallization of silicon solar cells [10][11][12][13][14][15]. The majority of studies show a combination of technologies to open the ARC by laser ablation or etching followed by ink jet printing of the silver metallization [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Ink jet printable silver metallization with zinc oxide for front side metallization for micro crystalline silicon solar cells

Jurk

Fritsch

Eberstein

et al. 2015

J. Micromech. Microeng.

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Ink jet printable water based inks are prepared by a new silver nanoparticle synthesis and the addition of nanoscaled ZnO particles. For the formation of front side contacts the inks are ink jet printed on the front side of micro crystalline silicon solar cells, and contact the cell directly during the firing step by etching through the wafers’ anti-reflection coating (ARC). In terms of Ag dissolution and precipitation the mechanism of contact formation can be compared to commercial glass containing thick film pastes. This avoids additional processing steps, like laser ablation, which are usually necessary to open the ARC prior to ink jet printing. As a consequence process costs can be reduced. In order to optimize the ARC etching and contact formation during firing, zinc oxide nanoparticles are investigated as an ink additive. By utilization of in situ contact resistivity measurements the mechanism of contacting was explored. Our results show that silver inks containing ZnO particles realize a specific contact resistance below 10 mΩ⋅cm2. By using a multi-pass ink jet printing and plating process a front side metallization of commercial 6 × 6 inch2 standard micro crystalline silicone solar cells with emitter resistance of 60 Ω/◽ was achieved and showed an efficiency of 15.7%.

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“…ear surface recombination reduction is a key feature of crystalline silicon solar cells including passivated emitter and rear cells (PERCs), passivated emitter and rear locally diffused cells, passivated emitter and rear totally diffused cells, and bifacial solar cells, which achieve an energy-conversion efficiency higher than that of the conventional aluminum back surface field (Al-BSF) cell. [1][2][3][4][5] These cells have dielectric-passivated rear surfaces, which reduce the surface recombination velocity and increase the internal reflectance. These features significantly increase the quantum efficiency near the band edge and allow the use of thinner wafers while increasing the efficiency.…”

mentioning

confidence: 99%

Internal quantum efficiency mapping for evaluation of rear surface of passivated emitter and rear cell

Mochizuki¹,

Joonwichien²,

Tanahashi³

et al. 2018

Appl. Phys. Express

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An internal quantum efficiency (IQE) mapping method that can emphasize the effects of local structures on the rear side of solar cells is demonstrated. The IQE of crystalline silicon passivated emitter and rear cells was mapped at 1000 nm and revealed periodic patterns with lower IQE in the local aluminum back surface fields on the rear surface. A larger-scale map indicated an effect that is apparently related to the spin-etching process on the rear surface. The proposed IQE mapping method can provide information that will help identify the factors that limit the efficiency.

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Understanding the uniqueness of the inkjet metallization of multicrystalline silicon solar cell

Cited by 3 publications

References 24 publications

Simulation of a liquid droplet ejection device using multi-actuator

Simulation of a liquid droplet ejection device using multi-actuator

Ink jet printable silver metallization with zinc oxide for front side metallization for micro crystalline silicon solar cells

Internal quantum efficiency mapping for evaluation of rear surface of passivated emitter and rear cell

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