摘要:
A solar cell is provided with a down-converter that converts incoming high energy photons into two or lower energy photons before conversion to electric current, in order to provide for more efficient conversion. The down-converter comprises a combination of Neodymium and Ytterbium ions in a sulfide. The sulfide may ne Indium Sulfide, doped with the Neodymium and Ytterbium. The indium sulfide may be combined with a CIS (Copper Indium Sulfide layer to form active layers of a solar cell, or the sulfide with Neodymium and Ytterbium may be used as a separate filter before conversion to electric current. A solar cell may be provided with an up converter realized by means of quantum dots in an absorber matrix.
摘要:
A thin-film solar cell comprising homojunctions between quaternary chalcogenide compounds is proposed. By using a chalcogenide layer of for example a Cu 2 A X(d) B Y(d) Z 4 compound with amounts of A and B that vary with depth, d, in the chalcogenide layer, sufficient freedom is obtained to realize a transition from n-type to p-type conductivity in the chalcogenide layer without changing the lattice structure and with minimum change of lattice constant. This allows to obtain solar cells with good energy conversion efficiencies. Two solar cell embodiments are described. In the first embodiment, a p-i-n configuration is realised by deposition of a layer of Cu 2 A X(d) B Y(d) Z 4 quaternary chalcogenide in which relative amount of elements A and B varies with the depth so as to result in a change in conductivity from p-type to n-type, including a part of the layer with intrinsic conductivity. The n-type contact layer (NC), the photovoltaic layer (PV). and the p-type contact layer (PC) have respective crystal lattices that mutually are substantially coherent so as to form homojunctions. In the second embodiment a p-n configuration is realised by deposition of a layer of Cu 2 A X(d) B Y(d) Z 4 quaternary chalcogenide in which relative amount of elements A and B varies with the depth so as to result in a change in conductivity from p-type to n-type. The p-type layer (PC) and the n-type layer (NC) have respective crystal lattices that mutually are substantially coherent so as to form substantially a p-n homojunction. In another aspect, a method for manufacturing a solar cell as defined in claim 1-8 is provided. Advantageously, a single deposition process can be used to form the chalcogenide layer comprising parts with different types of conductivity. This allows an efficient manufacturing process in which the solar cell can be formed in a single deposition tool.
摘要:
A thin-film solar cell comprising homojunctions between quaternary chalcogenide compounds is proposed. By using a chalcogenide layer of for example a Cu 2 A X(d) B Y(d) Z 4 compound, or more generally a Cu c A X(d) B Y(d) Z s compound, with amounts of A and B that vary with depth, d, in the chalcogenide layer, sufficient freedom is obtained to realize a transition from n-type to p-type conductivity in the chalcogenide layer without changing the lattice structure and with minimum change of lattice constant. This allows to obtain solar cells with good energy conversion efficiencies.
摘要:
A solar cell is provided with a down-converter that converts incoming high energy photons into two or lower energy photons before conversion to electric current, in order to provide for more efficient conversion. The down-converter comprises a combination of Neodymium and Ytterbium ions in a sulfide. The sulfide may ne Indium Sulfide, doped with the Neodymium and Ytterbium. The indium sulfide may be combined with a CIS (Copper Indium Sulfide layer to form active layers of a solar cell, or the sulfide with Neodymium and Ytterbium may be used as a separate filter before conversion to electric current. A solar cell may be provided with an up converter realized by means of quantum dots in an absorber matrix.
摘要:
The invention relates to a method for manufacturing a photovoltaic device comprising a layer comprising a transparent material, a layer comprising an n-type doped material and a layer comprising a p-type doped material. The second layer comprises an n-type doped material between the layer comprising a transparent material and the layer comprising a p-type doped material. The method is characterized by using spray deposition and/or electrostatic spray deposition (ESD) for applying at least two layers of the layers. (Electrostatic) spray deposition enables all layers to be deposited at atmospheric pressure in an ambient atmosphere. The requirement for vacuum based technologies can be dropped. Solar cells can be produced fully by the method of the present invention. Solar cells produced in accordance with the invention have comparable properties as solar cells from the prior art. The method according to the invention offers the possibility to produce the layers without a cooling down step.