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Heterojunction Solar Cells (a-Si/c-Si): Investigations on PECV Deposited Hydrogenated Silicon Alloys for use as High-Quality Surface Passivation and Emitter/BSF

Thomas Mueller

ISBN 978-3-8325-2291-9
280 Seiten, Erscheinungsjahr: 2009
Preis: 39.50 €
Heterojunction Solar Cells (a-Si/c-Si): Investigations on PECV Deposited Hydrogenated Silicon Alloys for use as High-Quality Surface Passivation and Emitter/BSF
The main focus of the present work is related to the optimization of heterojunction solar cells. The key roles in obtaining high efficient heterojunction solar cells are mainly the plasma enhanced chemical vapor deposition of very low defect layers, and the sufficient surface passivation of all interfaces. In heterojunction solar cells, the a-Si:H/c-Si hetero-interface is of significant importance, since the hetero-interface characteristics directly affect the junction properties and thus solar cell efficiency.

In this work, the deposition and film properties of various hydrogenated amorphous silicon alloys, such as a-SiC:H, a-SiOx:H, and µc-Si:H (standard a-Si:H is used as reference), are employed. Special attention is paid to (i) the front and back surface passivation of the bulk material by high-quality wide-gap amorphous silicon suboxides (a-SiOx:H), and (ii) the influence of wide-gap high-quality a-Si- and µc-Si-based alloys for use as emitter and back-surface-field.

Keywords:
  • heterojunction solar cells
  • surface passivation
  • PECVD
  • a-SiO:H
  • a-Si:H
  • a-SiC:H

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