Method to produce pn CdTe/CdS thin film solar cells

摘要

Method for producing pn-CdTe/CdS thin-film solar cells in which, on a transparent substrate in the form of inexpensive soda lime glass, a transparent TCO layer is deposited as a front contact, which layer is preferably provided with an ultra-thin indium layer which in turn is coated with the CdS layer, the substrate thus coated, up to the CdTe coating, being raised to a temperature between 480 DEG C and 520 DEG C, which is maintained during the subsequent rapid CdTe deposition according to the short-distance process using a preferred deposition rate from 5 to 15 mu m/min in an inert-gas atmosphere. The indium layer is dissolved during this deposition and produces the required n-doping of the CdS layer without an additional process step. In this manner it is possible to produce solar cells having a high efficiency in a cost- effective process suitable for mass production. ……