The project undertakes the first complete, fundamental study of the fabrication and improvement of the interfaces involved in tandem and single junction a-Si:H solar cells. This requires a thorough understanding of the plasma and plasma/interface interactions involved in a-Si:H fabrication.
We expect to be able to produce, at the end of the project, tandem and single junction solar cells with an initial efficiency of 12% and degradation of less than 15%.
The primary aim of this collaborative project is to fabricate highly efficient, degradation-resistant single-junction and tandem a-Si:H solar cells. The a-Si cell technology is to be developed beyond current levels and understanding of the physical processes at work in the p-i-n structure is to be deepened.
Our plan is to apply for the first time a comprehensive battery of in situ analysis techniques to the study and improvement of the interfaces, along with modelling of the performance and degradation of the interfaces and overall structure. We expect this investigation of interface quality to allow a significant improvement in the long-term performance of a-Si:H solar cells. We shall further investigate the performance of the highly stable i-layers deposited in non-standard conditions as part of the currently running Joule II contract (JoU2-CT92-0027. Moreover, we shall pursue the development of the very promising
efficiency and enhanced stability in tandem cells. These advancements will enable us to produce single junction and tandem solar cells with an initial efficiency of 12% and a degradation inferior to 15%. More specifically the research tasks are :
1) Fundamental, in-depth study of the interfaces in p-i-n structures by insitu analysis techniques, and deposition process adaptation. 2) Development of novel single-junction and tandem structures incorporating degradation-resistant i-layers deposited under non-standard conditions and intrinsic and doped *cSi layers.
3) Metastability studies coupled with simulation of the efficiency and extensive characterization of the solar cells.
Funding SchemeCSC - Cost-sharing contracts