The influence of holes in the mechanical properties of EWT solar cells

Barredo, J.; Fraile, Alberto; Rey, Ignacio del; Hermanns, Ludger M.

doi:10.1016/j.proeng.2011.04.534

Cited by 7 publications

(3 citation statements)

References 2 publications

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“…Regarding to the characteristic fracture stress, it can be seen that the tiny holes of set 1 don't have too much influence in the mechanical strength. Previous results [1,3,4,8] show a major reduction due to the presence of holes with similar diameter but in these cases, the distance between holes was much smaller. In those studies, the samples prepared represented the physical structure of wafers for EWT solar cells where holes are closer than those present in the samples prepare for this study.…”

Section: Resultsmentioning

confidence: 66%

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Study of the effect of different hole sizes on mechanical strength of wafers for back contact solar cells

Cereceda

Barredo²,

Gutiérrez

et al. 2012

2012 38th IEEE Photovoltaic Specialists Conference

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-Drilling process on wafers to produce EWT or MWT solar cells is a critical fabrication step, which affects on their mechanical stability. The amount of damage introduced during drilling process depends on the density of holes, their size and the chemical process applied afterwards. To quantify the relation between size of the holes and reduction of mechanical strength, several sets of wafers have been prepared, with different hole diameter. The mechanical strength of these sets has been measured by the ring on ring bending test, and the stress state in the moment of failure has been deduced by FE simulation.

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Section: Resultsmentioning

confidence: 66%

“…In previous studies [8] it was demonstrated that the influence of the holes in the stiffness of the wafer can be neglected. Therefore, two models without holes are developed: one model corresponding to the thinnest wafer and other model corresponding o the thickest one.…”

Section: Numerical Modelmentioning

confidence: 99%

Study of the effect of different hole sizes on mechanical strength of wafers for back contact solar cells

Cereceda

Barredo²,

Gutiérrez

et al. 2012

2012 38th IEEE Photovoltaic Specialists Conference

Self Cite

View full text Add to dashboard Cite

show abstract

“…En una segunda etapa, se genera un submodelo de la zona que se desea estudiar con profundidad (con una malla mucho mas renada) y se aplican en el contorno del submodelo los desplazamientos obtenidos en la simulación con la malla gruesa. De esta manera, se obtienen las tensiones con precisión en la zona deseada con un coste computacional más bajo a partir de dos cálculos: una simulación completa con una malla gruesa y el cálculo de las tensiones con desplazamientos impuestos en el submodelo [6], [4], [9].…”

Section: Modelo Numéricounclassified