Publication result detail

GROWTH OF MICROCRYSTALLINE GRAINS IN MIXED PHASE SILICON THIN FILMS FOR SOLAR CELLS

FEJFAR, A., MATĚJKOVÁ, J.

Original Title

GROWTH OF MICROCRYSTALLINE GRAINS IN MIXED PHASE SILICON THIN FILMS FOR SOLAR CELLS

English Title

GROWTH OF MICROCRYSTALLINE GRAINS IN MIXED PHASE SILICON THIN FILMS FOR SOLAR CELLS

Type

Paper in proceedings (conference paper)

Original Abstract

Growth of isolated grains in the mixed phase silicon films was examined by atomic force microscopy. We propose to use the grain shape as a probe for otherwise inaccessible microscopic growth processes. The depression of amorphous silicon surface in the vicinity of the grains was used to estimate the diffusion length of the growth precursors to be (60 ± 30) nm. Grains have approximately conical shape but the slope of the grain boundary evolves in two growth stages (expansion and elongation). During the whole evolution the caps of the grains on the surface keep spherical shape. A possibility of light focussing by the spherical grain caps was suggested. Coincidence of the focussed photogeneration with the high electric field region near the grain tip could lead to solar cells with photogeneration of the carriers spatially separated according to the photon energy.

English abstract

Growth of isolated grains in the mixed phase silicon films was examined by atomic force microscopy. We propose to use the grain shape as a probe for otherwise inaccessible microscopic growth processes. The depression of amorphous silicon surface in the vicinity of the grains was used to estimate the diffusion length of the growth precursors to be (60 ± 30) nm. Grains have approximately conical shape but the slope of the grain boundary evolves in two growth stages (expansion and elongation). During the whole evolution the caps of the grains on the surface keep spherical shape. A possibility of light focussing by the spherical grain caps was suggested. Coincidence of the focussed photogeneration with the high electric field region near the grain tip could lead to solar cells with photogeneration of the carriers spatially separated according to the photon energy.

Key words in English

Crystalline Si, Si-Films, Fundamentals, Growth precursors

Authors

FEJFAR, A., MATĚJKOVÁ, J.

Released

01.01.2004

Location

Paris

Book

Proceedings of 19th European Photovoltaic Solar Energy Conference and Exhibition

Pages from

1

Pages count

3

BibTex

@inproceedings{BUT11282,
  author="Antonín {Fejfar} and Jiřina {Matějková}",
  title="GROWTH OF MICROCRYSTALLINE GRAINS IN MIXED PHASE SILICON THIN FILMS FOR SOLAR CELLS",
  booktitle="Proceedings of 19th European Photovoltaic Solar Energy Conference and Exhibition",
  year="2004",
  pages="3",
  address="Paris"
}