Moly-polt solar cell: Industrial application of metal-oxide passivating contacts with a starting efficiency of 18.1%

We present large-area “moly-poly” cells, with a front side MoOx/a-Si:H(i) passivating contact and a rear-side poly-Si/SiOx stack, and we have demonstrated that MoOx based c-Si solar cell technology can be scaled to industrial wafer size. Excellent surface passivation was achieved using MoOx and poly-Si, leading to implied Voc values above 700 mV...

Electron beam evaporated molybdenum oxide as Hole-selective contact 6-inch c-Si Heterojunction solar cells

Electron beam (E-beam) deposited molybdenum oxide (MoOx) has been investigated for its potential to replace p-type hydrogenated amorphous silicon (a-Si:H) in Si heterojunction (SHJ) solar cells. Excellent passivation was achieved for our best MoOx/c-Si junction based device, reaching an average implied Voc (iVoc) of 734 mV on textured,...

Production of low cost back contact based PV modules

In this paper, two developments targeted at reducing the production cost of back-contact modules are presented. The first cost reduction potential is realised by replacing the conductive copper layer with aluminium with a very thin and locally applied copper coating using cold spray technology. This results in a 2% PV module cost saving while...

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Thermochemical seasonal solar heat storage with MgCl2.6H2O: First upscaling of the reactor

In the summer, the available of solar heat exceeds the total heat demand of a building, but in the winter the heat demand is exceeding the solar supply. For the future conversion of a passive house into an energy neutral house, a solution is to store the excess of solar energy in summer, and to use it to meet the heat demand in winter. Water is...

Application of MgCl2•6H2O for thermochemical seasonal solar heat storage

The heat demand in the summer can be completely fulfilled using solar heat, but in the winter the heat demand is exceeding the solar supply. A solution is to store the excess of solar energy in the summer, and to use it to fulfill the heat demand in the winter. Water is traditionally used for storing heat (e.g. solar boiler), but seasonal heat...

Development of a compact heat storage system based on salt hydrates

Thermochemical reactions are one of the most promising means for compact, low loss and long term storage of solar heat in the built environment. The heat can be stored by making use of a reversible chemical reaction. In theory, an energy density 5-10 times higher than water can be reached. Additionally, no storage losses are associated with...

An evaluation of the economical feasibility of seasonal sorption heat storage

An evaluation is presented of the economical feasibility of seasonal heat storage of solar heat with sorption materials. The seasonal sorption heat storage is shown to pay itself back over its lifetime, under the assumptions presented. Attention is given to the verification of the assumptions, since these have a large effect on the conclusions.

Application of MgCl2.6H2O for thermochemical seasonal solar heat storage

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