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ELECTRO-CONDUCTIVE PASTE COMPRISING SILVER POWDER WITH D50 IN A SPECIFIC RANGE AND FAST COOLING IN N-TYPE SOLAR CELL PRODUCTION

IP.com Disclosure Number: IPCOM000235451D
Publication Date: 2014-Feb-28

Publishing Venue

The IP.com Prior Art Database

Abstract

The invention relates to an electro-conductive paste comprising silver powder with d50 in a specific range and fast cooling in solar cell preparation, preferably n-type solar cell prepara-tion. In particular, the invention relates to a process for preparing a solar cell, a solar cell obtainable from such a process and solar modules comprising at least one such solar cell. The invention relates to a process for the preparation of a solar cell at least comprising the preparation steps: i) provision of a wafer (101); ii) application of an electro-conductive paste onto the wafer (101), wherein the electro-conductive paste comprises as paste constituents: a) Ag particles with d50 in a range from about 2 to about 4 µm; b) an inorganic reaction system; c) an organic vehicle; and d) an additive; to obtain a solar cell precursor; iii) firing of the solar cell precursor to give a solar cell; iv) rapid cooling of the solar cell, wherein a maximum cooling rate of at least about 50 Ks-1 is reached.