Degradation study on a commercial copper indium diselenide module

This paper will illustrate the collaborative research conducted by Paul Scherrer Institute and The University of Hong Kong on the behaviour of a commercially available CIS module under real operating conditions. Tests done under different cell temperature, solar irradiance, and air mass conditions facilitate the development of a semi-empirical efficiency model on a newly purchased CIS module. The tests were repeated after one year´s exposure to sunlight. The system set-up, measuring procedures, and test results are presented. Following detailed analysis of the results, it is suggested that the PV industry broadens disclosure of module parameters in future technical data published.