Abstract: The invention relates to a glass frit being a mixture of a first glass frit comprising tellurium oxide and bismuth oxide as main components and a second glass frit comprising tellurium oxide and lead oxide as main components, wherein the mixture of the first glass frit and the second glass frit comprises 40 to 55% by weight of tellurium oxide, 15 to 25% by weight of lead oxide and 5 to 15% by weight of bismuth oxide. The invention further relates to a conductive paste for forming electrodes on a semiconductor substrate, the paste comprising 85 to 92% by weight of an electrically conductive metal, 1.5 to 3.5% by weight of the glass frit and organic medium. The conductive paste is used for forming electrically conductive grid lines on semiconductor substrates for solar cells.

Abstract: In a thermoelectric module consisting of p- and n-conducting thermoelectric material pieces which are alternately connected to one another via electrically conductive contacts, the thermoelectric module (19) is thermally conductively connected to a micro heat exchanger (13) which comprises a plurality of continuous channels having a diameter of at most 1 mm, through which a fluid heat exchanger medium can flow.

Abstract: A segmented lead telluride egg-crate thermoelectric module. In preferred embodiments N legs and P legs are segmented into at least two segments. The segments are chosen for their figure of merit in the various temperature ranges between the hot side and the cold side of the module. In preferred embodiments a low-temperature egg-crate, molded from a liquid crystal polymer material, having very low thermal conductivity holds in place and provides insulation and electrical connections for the thermoelectric N legs and P legs at the cold side of the module. A castable ceramic capable of operation at temperatures in excess of 500° C. is used to provide electrical insulation between the legs at the hot side of the module.