Aufgrund von Vorbereitungen auf eine neue Version von KOPS, können derzeit keine Publikationen eingereicht werden. (Due to preparations for a new version of KOPS, no publications can be submitted currently.)
Type of Publication: | Dissertation |
Publication status: | Published |
URI (citable link): | http://nbn-resolving.de/urn:nbn:de:bsz:352-2-19tzla6vns71f7 |
Author: | Linke, Jonathan (geb. Steffens) |
Year of publication: | 2020 |
Summary: |
In this thesis, dependencies between incorporation of foreign elements in the poly-Si layer and solar cell performance of poly-Si/SiOx passivating contacts are explored. For both dopant polarities a difference in total and electrically active dopant concentrations is observed. If applied on the front side of a solar cell, poly-Si/SiOx contacts based on phosphorus doped poly-Si layers are rather limited by free carrier absorption and based on boron doped poly-Si layers are rather limited by detrimental strong dopant in-diffusion. Incorporation of the light elements oxygen, nitrogen and carbon widens the optical band gap and thus lowers parasitic absorption in the poly-Si layer at the expense of a higher resistivity. Both effects are mediated by a lower crystallinity compared to pure poly-Si layers without incorporated light elements. Therefore, the crystallinity was identified as key parameter for solar cell performance if applied on the front side of a solar cell. All investigated layer types yield an excellent passivation quality in terms of contact recombination current densities down to Jc = 2.3 fA/cm2 and selectivities up to S10 = 15.2. The maximum achievable efficiency for an application of the investigated layers in an actual solar cell is estimated to 24.2% for a phosphorus doped poly-Si layer on the rear side and a boron doped poly-SiOxNy layer on the front side with thicknesses of 100 nm. This limit may be increased by 2%abs if the layer thicknesses are reduced to 30 nm.
|
Examination date (for dissertations): | May 18, 2020 |
Dissertation note: | Doctoral dissertation, University of Konstanz |
Subject (DDC): | 530 Physics |
Keywords: | photovoltaics, polycrystalline silicon, poly-Si, passivating contacts |
Link to License: | Attribution-NonCommercial-NoDerivatives 4.0 International |
Bibliography of Konstanz: | Yes |
LINKE, Jonathan (geb. Steffens), 2020. Dependencies Between poly-Si Composition and Solar Cell Performance of poly-Si/SiOx Passivating Contacts [Dissertation]. Konstanz: University of Konstanz
@phdthesis{Linke2020Depen-51641, title={Dependencies Between poly-Si Composition and Solar Cell Performance of poly-Si/SiOx Passivating Contacts}, year={2020}, author={Linke, Jonathan (geb. Steffens)}, address={Konstanz}, school={Universität Konstanz} }
Steffens_2-19tzla6vns71f7.pdf | 706 |