Changes of solar cell parameters during damp-heat exposure
Jiang Zhu, Michael Koehl, Stephan Hoffmann, Karl Anton Berger, Shokufeh Zamini, Ian Bennett, Eric Gerritsen, Philippe Malbranche, Paola Pugliatti, Agnese Di Stefano, Francesco Aleo, Dario Bertani, Fabrizio Paletta, Francesco Roca, Giorgio Graditi, Michele Pellegrino, Oihana Zubillaga, F. J. Cano Iranzo, Alberto Pozza, Tony Sample and Ralph Gottschalg
Version of Record online: 22 JUN 2016 | DOI: 10.1002/pip.2793
The electrical ageing of photovoltaic modules during extended damp-heat tests at different stress levels is investigated. Deploying different stress levels allows determination of an equivalent stress dose function, which is a first step towards the lifetime prediction of devices. The derived dose function is used to characterize the degradation of power as well as that of the solar cell's equivalent circuit parameters. This approach identifies the primary contributors to the power degradation and distinguishes the potential ageing mechanism.