2015, Harndt, Susanna, Kaufmann, Christian A., Lux-Steiner, Martha C., Klenk, Reiner, Nürnberg, Reiner

The influence of absorber grain boundaries on the photocurrent transport in chalcopyrite based thin film solar cells has been calculated using a two dimensional numerical model. Considering extreme cases, the variation in red response is more expressed than in one dimensional models. These findings may offer an explanation for the strong influence of buffer layer preparation on the spectral response of cells with small grained absorbers.