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An optoelectronic analysis of SiC with and without embedded silicon nanocrystals is presented. The layers are implemented as the absorber to membrane-based p-i-n solar cells and characterized by illumination-dependent IV measurements and electroluminescence. The silicon nanocrystals in silicon carbide were prepared by solid-phase crystallization and contacted with doped a-SixC1-x:H. The fundamental transport and recombination properties, i.e. the effective mobility lifetime product, of the nanocrystal layer is determined at device level. For this means, illumination-dependent current-voltage curves are modeled with a voltage-dependent collection function with only two free parameters, and excellent agreement is found between theory and experiment. Electroluminescence measurements are presented and conclusions are drawn regarding the electronic structure of the SiC host matrix.
Publication date: 
16 Jun 2013

Philipp Loper, Jan Valenta, Mariaconcetta Canino, Stefan Glunz, Stefan Janz, Margit Zacharias

Biblio References: 
Pages: 0296-0299
Photovoltaic Specialists Conference (PVSC), 2013 IEEE 39th