Laser Application in Photovoltaics for Surface Texturization of Silicon and Front Electrode Deposition

2019 ◽  
Vol 8 (6) ◽  
pp. 20190061 ◽  
Author(s):  
Leszek A. Dobrzański ◽  
Aleksandra Drygała
Keyword(s):  
Laser Application ◽  
Front Electrode

Lasertechniques treatment of vascular malformations

Phlebologie ◽  
2010 ◽  
Vol 39 (03) ◽  
pp. 167-175
Author(s):  
M. Poetke ◽  
P. Urban ◽  
H.-P. Berlien
Keyword(s):  
Endothelial Cells ◽  
Spontaneous Regression ◽  
Vascular System ◽  
Vascular Malformations ◽  
Clinical Importance ◽  
Vascular Structure ◽  
Laser Application ◽  
Vascular Morphogenesis ◽  
Structural Abnormalities

SummaryVascular malformations are structural abnormalities, errors of vascular morphogenesis, which can be localized in all parts of the vascular system. All vascular malformations by definition, are present at birth and grow proportionately with the child; their volume can change. In contrast to the haemangiomas, which only proliferate from the endothelial cells the division in stages is of clinical importance. Vascular malformations are divided from the part of vascular system, which is affected.In principle the techniques of laser application in congenital vascular tumours like haemangiomas and in vascular malformations are similar, but the aim is different. In tumours the aim is to induce regression, in vascular malformations the aim is to destroy the pathologic vascular structure because there is no spontaneous regression. This means that the parameters for treatment of vascular malformations must be more aggressive than for vascular tumours.

Laser application.

1987 ◽  
Vol 7 (24) ◽  
pp. 10-11
Author(s):  
Motoaki YANO
Keyword(s):  
Laser Application

Hardness and wear behaviour of multiple component coating on Ti-6Al-4V substrate by laser application

Optik ◽  
2020 ◽  
Vol 202 ◽  
pp. 163555 ◽  
Author(s):  
Dipanjan Dey ◽  
Kalinga Simant Bal ◽  
Anitesh Kumar Singh ◽  
Asimava Roy Choudhury
Keyword(s):  
Wear Behaviour ◽  
Laser Application ◽  
Multiple Component

Nd3+:YAG microspheres powders prepared by spray pyrolysis: Synthesis, characterization and random laser application

2021 ◽  
pp. 124764
Author(s):  
Roberta Silva Pugina ◽  
Eloísa Garibalde Hilário ◽  
Euzane Gomes da Rocha ◽  
Manoel L. da Silva-Neto ◽  
Avishek Das ◽  
...  
Keyword(s):  
Spray Pyrolysis ◽  
Random Laser ◽  
Laser Application ◽  
Pyrolysis Synthesis

scholarly journals Cell/Module Integration Technology with Wire-Embedded EVA Sheet

2021 ◽  
Vol 11 (9) ◽  
pp. 4170
Author(s):  
Jeong Eun Park ◽  
Won Seok Choi ◽  
Donggun Lim
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
High Power ◽  
Short Circuit ◽  
Optical Loss ◽  
Manufacturing Cost ◽  
Power Module ◽  
Manufacturing Method ◽  
Front Electrode ◽  
The Wire

Silicon wafers are crucial for determining the price of solar cell modules. To reduce the manufacturing cost of photovoltaic devices, the thicknesses of wafers are reduced. However, the conventional module manufacturing method using the tabbing process has a disadvantage in that the cell is damaged because of the high temperature and pressure of the soldering process, which is complicated, thus increasing the process cost. Consequently, when the wafer is thinned, the breakage rate increases during the module process, resulting in a lower yield; further, the module performance decreases owing to cracks and thermal stress. To solve this problem, a module manufacturing method is proposed in which cells and wires are bonded through the lamination process. This method minimizes the thermal damage and mechanical stress applied to solar cells during the tabbing process, thereby manufacturing high-power modules. When adopting this method, the front electrode should be customized because it requires busbarless solar cells different from the existing busbar solar cells. Accordingly, the front electrode was designed using various simulation programs such as Griddler 2.5 and MathCAD, and the effect of the diameter and number of wires in contact with the front finger line of the solar cell on the module characteristics was analyzed. Consequently, the efficiency of the module manufactured with 12 wires and a wire diameter of 0.36 mm exhibited the highest efficiency at 20.28%. This is because even if the optical loss increases with the diameter of the wire, the series resistance considerably decreases rather than the loss of the short-circuit current, thereby improving the fill factor. The characteristics of the wire-embedded ethylene vinyl acetate (EVA) sheet module were confirmed to be better than those of the five busbar tabbing modules manufactured by the tabbing process; further, a high-power module that sufficiently compensated for the disadvantages of the tabbing module was manufactured.

Spray pyrolysis deposited Cr and In doped CdS films for laser application

2021 ◽  
Vol 117 ◽  
pp. 111153
Author(s):  
Evgeny Gavrishchuk ◽  
Dmitry Savin ◽  
Tatyana Tomilova ◽  
Vladimir Ikonnikov ◽  
Sergey Kurashkin ◽  
...  
Keyword(s):  
Spray Pyrolysis ◽  
Laser Application ◽  
Cds Films

Morphological evaluation of dentin and Y-TZP after short-pulse laser application

2014 ◽  
Vol 30 ◽  
pp. e137
Author(s):  
A. Bona Matos ◽  
P.F. Cesar ◽  
L.T. Trevelin ◽  
B.T.F. Silva ◽  
C.S. Azevedo ◽  
...  
Keyword(s):  
Pulse Laser ◽  
Short Pulse ◽  
Laser Application ◽  
Short Pulse Laser ◽  
Morphological Evaluation

Effects of polymer binder on rheological properties of silver pastes for screen printing front electrode films of solar cells

2015 ◽  
Vol 29 (10n11) ◽  
pp. 1540027 ◽  
Author(s):  
Jun Qin ◽  
Weijun Zhang ◽  
Zhuofeng Liu ◽  
Shuxin Bai
Keyword(s):  
Solar Cells ◽  
Rheological Properties ◽  
Screen Printing ◽  
Model Parameters ◽  
Silver Particles ◽  
Front Electrode ◽  
Strength Of Interaction ◽  
Fundamental Understanding ◽  
Surface Modified ◽  
Down Sweep

The purpose of the study is to characterize and improve the fundamental understanding of the effects of Ethyl Cellulose (EC) binder on the rheological properties of silver pastes for screen printing front electrode films of solar cells. Dispersions of silver particles (surface modified with oleic acid) in EC polymer solutions with and without thixotropic agent were prepared; and yield stress values were measured by setting shear stress to characterize the strength of interaction in pastes. Week flocculation network of silver particles is produced due to depletion of flocculation. EC polymer also has a significant interaction with thixotropic agent. Down-sweep flow curves of dispersions without thixotropic agent were measured and well fitted by Generalized Casson model. The model parameters p indicated that EC polymer with high molecular weight has a stronger shear-thinning ability. Steady-state flow, three interval thixotropy shear test (3ITT) and oscillatory measurements were conducted to study the effect of EC content on viscosity, structure rebuilding and viscoelastic properties of electrode pastes. Increasing EC polymer is not the best way to prevent the layer printed from laying down.

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