Université de Neuchâtel

Microcrystalline silicon and the impact on micromorph tandem solar cells

Meier, Johannes ; Dubail, S. ; Golay, S. ; Kroll, U. ; Faÿ, Sylvie ; Vallat-Sauvain, Evelyne ; Feitknecht, Luc ; Dubail, J. ; Shah, Arvind

In: Solar Energy Materials and Solar Cells, 2002, vol. 74, no. 1-4, p. 457-467

Intrinsic microcrystalline silicon opens up new ways for silicon thin-film multi-junction solar cells, the most promising being the “micromorph” tandem concept. The microstructure of entirely microcrystalline p–i–n solar cells is investigated by transmission electron microscopy. By applying low pressure chemical vapor deposition ZnO as front TCO in p–i–n configurated micromorph...

Université de Neuchâtel

Plasma deposition of thin film silicon: kinetics monitored by optical emission spectroscopy

Feitknecht, Luc ; Meier, Johannes ; Torres, Pedro ; Zürcher, Jerôme ; Shah, Arvind

In: Solar Energy Materials and Solar Cells, 2002, vol. 74, no. 1.4, p. 539-545

The optical emission spectroscopy technique is used to characterise the temporal behaviour of a pure silane plasma in the first 90 s after ignition of a static closed-chamber very high frequency glow discharge. Special interest is drawn to the formation of microcrystalline silicon (μc-Si:H) in absence of any hydrogen feedstock gas dilution. The kinetics of the emission lines of SiH* and...

Université de Neuchâtel

Microcrystalline silicon and ‘micromorph’ tandem solar cells

Shah, Arvind ; Meier, J. ; Vallat-Sauvain, Evelyne ; Droz, C. ; Kroll, U. ; Wyrsch, Nicolas ; Guillet, J. ; Graf, U.

In: Thin Solid Films, 2002, vol. 403-404, p. 179-187

The case for thin-film silicon as one of the main future options for cost-effective photovoltaic solar cells is outlined. The limitations of present amorphous silicon (a-Si:H) solar cells are briefly mentioned. Hydrogenated microcrystalline silicon (μc-Si:H) deposited by PECVD (plasma-enhanced chemical vapor deposition) at low substrate temperatures (approx. 200 °C) constitutes a new and...