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When considering the cost of a photovoltaic module, still a large part consists of silicon wafer material. One solution is the usage of ribbon material, which provides moderate quality material at a low cost due to low kerf losses. Here we present the use of Ribbon on a Sacrificial Template (RST) wafers in a classic solar cell process. The quality of this material is determined by Quasi Steady State...
In search of solar cell concepts that allow processing thinner wafers (<150 micron), the conventional full Al rear side is replaced by an open rear metallization combined with a dielectric passivation layer. We show a gain of 2.1% (relative) in the product of Jsc??Voc, when we apply a passivated SiNx dielectric layer and local Al contacts on the rear of p-type mc-Si solar cells instead of a full...
The industrial standard process for producing solar cell front sides includes several drawbacks. First of all the screen-printed front side metallisation with silver paste leads to contacts with a poor aspect ratio and a low conduction quality due to the composition of a printable paste. Additionally, the poor contact resistance requires high surface doping concentrations of the emitter. When using...
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