A p-type solar cell and a production method thereof

Abstract

A p-type solar cell comprising a layer stack (10) is provided. The layer stack includes: a back electrode (14), a p-type semiconductor absorber layer (11) disposed on the back electrode (14), a crystalline cadmium sulfide (CdS) layer (12) disposed on the absorber layer (1), and a front electrode (15) disposed on the side of the layer stack (10) opposite of the back electrode (14). A production method of the p-type solar cell is also provided by the invention. The method includes providing the p-type photoactive semiconductor absorber layer (11), etching the surface of the absorber layer (11) such that crystallographic unevenness and pinholes are reduced, depositing a CdS layer (12) on the absorber layer (11), with a layer thickness between 50 and 200 angstroms, heating at least the CdS layer (12) to recrystallize the CdS layer, and optionally placing on the absorber layer (11) a Cu-containing layer different from the CdS layer, either after etching or after the application of the CdS layer (12).

Description

technical field [0001] The invention relates to a preparation method of a p-type solar cell and its product. The cell has a stacked structure, and the stacked structure includes a back electrode, a p-type semiconductor absorber layer placed on the back electrode, and a p-type semiconductor absorber layer placed on the absorber layer. A copper-doped cadmium sulfide (Cds) layer, and a front electrode placed on the side of the stacked structure away from the back electrode. Background technique [0002] High-efficiency solar panels are usually p-n-type cells that are capable of separating charge carriers and directing the separated charge carriers to electrodes in order to generate photo-voltage and photo-current. In addition, there have been attempts to propose a Schottky barrier to replace the p-n junction. Solar cells need to be tempered to achieve higher efficiency, thus causing the thin n-layer near the Schottky barrier to become doped n-type, thus effectively creating a ...

Images