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Microcrystalline silicon and ‘micromorph’ tandem solar cells
Auteur(s)
Shah, Arvind
Meier, J.
Vallat-Sauvain, Evelyne
Droz, C.
Kroll, U.
Wyrsch, Nicolas
Guillet, J.
Graf, U.
Date de parution
2002
In
Thin Solid Films, Elsevier, 2002/403-404//179-187
Résumé
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 additional possibility for solar cells. Properties of intrinsic μc-Si:H layers deposited by PECVD at VHF (very high frequency) excitation frequencies are listed, together with the necessary conditions for obtaining device-grade material. Performances obtained so far with μc-Si:H solar cells are given; the latter are compared with estimated limits for pn- and pin-type devices with <i>E<sub>g</sub></i>=1.1 eV. Finally, present performances and future perspectives for ‘micromorph’ (μc-Si:H/a-Si:H) tandem solar cells are discussed.
Identifiants
Type de publication
journal article
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