New 3-dimensional nanostructured thin film silicon solar cells

0355137 - FZÚ 2011 RIV DE eng C - Conference Paper (international conference)
Vaněček, Milan - Neykova, Neda - Babchenko, Oleg - Purkrt, Adam - Poruba, Aleš - Remeš, Zdeněk - Holovský, Jakub - Hruška, Karel - Meier, J. - Kroll, U.
New 3-dimensional nanostructured thin film silicon solar cells.
Proceedings of the 25th European Photovoltaic Solar Energy Conference / 5th World Conference on Photovoltaic Energy Conversion. München: WIP-Renewable energies, 2010, s. 2763-2766. ISBN 3-936338-26-4.
[European Photovoltaic Solar Energy Conference /25./ and World Conference on Photovoltaic Energy Conversion /5./. Valencia (ES), 06.09.2010-10.09.2010]
R&D Projects: GA MŠMT(CZ) 7E09057
EU Projects: European Commission(XE) 214134 - N2P
Institutional research plan: CEZ:AV0Z10100521
Keywords : thin film solar cells, * TCO transparent conductive oxides * a-Si * high stable efficiency, * ZnO
Subject RIV: BM - Solid Matter Physics ; Magnetism

We present a “bottom up” approach for deposition of ZnO nanocolumns by direct low temperature hydrothermal synthesis and the results of complementary design with nano- or micro-holes etched into the ZnO (“Swiss cheese” design). Electron beam lithography was used for defining the openings in resist for selective ZnO nanocolumns growth in the first case, optical lithography and reactive ion etching have been used to fabricate the holes into ZnO substrate in the later case. Monte Carlo modeling of these new, 3D solar cells, using already existing materials is presented. Calculations show that stable efficiency of amorphous silicon p-i-n solar cells in over 12% range is possible and for the Micromorph cells efficiency can reach over 15%, with the layer thickness of amorphous Si below 200 nm and microcrystalline Si around 500 nm. The first “proof of concept” Micromorph cell with the “Swiss cheese” design is presented.
Permanent Link: http://hdl.handle.net/11104/0193976