研究目的

Investigating the stability, reliability, upscaling, and technological applications of Kesterite (Cu2ZnSn(S,Se)4, CZTSSe) based solar cells.

研究成果

We have reviewed the stability, reliability, upscaling and the technological applications of the Kesterite material, and disclosed some unpublished data. Long stability tests on wet processed Kesterite cells both under continuous indoor irradiance and in outdoors field test show no or small initial efficiency loss. Also long accelarated heat tests on monograin-based kesterites cells did not show any large degradation for certain CZTS compositions. The monograin technology is quite advanced, and specially ready for indoor flexible applications. The thin film technologies are under investigation, with two main varieties: an all-line vacuum process, or a wet process based on colloidal ink spraying. The latter has already shown >7% efficiency in the first test, which is less than 20% loss with respect to small cells of the same structure and composition. Possible technological applications of Kesterite based solar cells were identified in the fields of photovoltaics and water splitting, both technologies largely taking advantage of the relative low cost and abundancy of the starting materials, allowing on the long term mass production at relatively low cost.

研究不足

The technical and application constraints of the experiments, as well as potential areas for optimization.