Jing Han

US Patent:

20160190358, Jun 30, 2016

Filed:

Jul 9, 2014

Appl. No.:

14/902900

Inventors:

- Hanau, DE
Jing HAN - Lafayette Hill PA, US
Matthias HÖRTEIS - Hanau, DE

International Classification:

H01L 31/0224

Abstract:

The invention relates to an electro-conductive paste comprising Ag particles with a multimodal diameter distribution in the preparation of electrodes in solar cells, particularly in the preparation of electrodes in MWT solar cells, particularly in the preparation of the metal wrap through, or plug, electrode in such solar cells. In particular, the invention relates to a solar cell precursor, a process for preparing a solar cell, a solar cell and a module comprising solar cells. The invention relates to a solar cell precursor at least comprising as precursor parts: i) a wafer with at least one hole with a Si surface; ii) an electro-conductive paste at least comprising as paste constituents: a) metallic particles; b) an inorganic reaction system; c) an organic vehicle; and d) an additive; comprised by the hole, wherein the metallic particles have a multimodal distribution of particle diameter.