Category: Solar Energy 5

Solder spots per bus-bar

Fig. 7. Reduction of the series resistance with the increment of bonding points per bus-bar, result of the modelling are presented as an increment with respect to the situation of having 14 bonding point. Joining this series resistance parameters and the response of an ideal diode, inside a modelling of solar cell, allows to optimise […]

Series resistance analytical modelling and optimal design for the front grid of industrial solar cells

The continuous rises in current that industrial photovoltaic devices have been undergoing due to the continuous improvement of materials, processing, device design and over all, substrate wafer size increase, make its associated device power losses also increase. Thus, FIRING PROCESS BSF DOWN 880 900 920 940 960 980 Firing zone Temperature (*C) 880 900 920 […]

Supplied pastes properties

Among the parameters typically reported by the paste suppliers it is possible to find: • The ‘Viscosity’, whose characterization should report the measured value along with equipment used to measure viscosity (spindle or cone/plate) and temperature. • Possible ‘Thinners’ that are listed in the event of needed viscosity adjustments. • The ‘Solids Content’ that is […]

Composition of metallic pastes

3.1 Front paste composition Metallic contact nowadays employed by the industry are based on the use of silver as a conductive metal due to its good contact properties with n type silicon, its good conductivity and its excellent solderability (needed for the later interconnection of cells). To make the deposition of this metallic contact with […]