Engineering of Advanced Materials

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Cluster of Excellence

Engineering of Advanced Materials

Friedrich-Alexander-Universität Erlangen-Nürnberg

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Cluster of Excellence
Engineering of
Advanced Materials (EAM)

Nägelsbachstrasse 49b
91052 Erlangen, Germany
eam-administration@fau.de
03. July 2017

Picture of the month: ›Carpathian morning‹: ZnCdS:Mn@ZnS core-shell down-shifting nanocrytsals on top of a a Si solar cell

The low efficiencies of inorganic solar cells in the ultraviolet (UV) and blue spectral region are key factors which restrict their power conversion efficiency (PCE). A simple and reliable technological step to overcome these limitations is the coating of the solar cells by UV-light conversion materials. At EAM, we developed a simple one-pot synthesis of highly luminescence ZnCdS:Mn@ZnS core-shell nanocrystals (NCs) with a record quantum yield of 70%. With our NCs and simple coating technique, the efficiency of a commercial Si solar cell was improved up to 12% in the UV spectral region, leading to an enhancement of the PCE by nearly 0.5 percentage points.

Reference
Levchuk, I.; Würth, C.; Krause, F.; Osvet, A.; Batentschuk, M.; Resch-Genger, U.; Kolbeck, C.; Herre, P.; Steinrück, H.-P.; Peukert, W.; Brabec, C. J.
Industrially scalable and cost-effective Mn2+doped ZnxCd1-xS/ZnS nanocrystals with 70% photoluminescence quantum yield, as efficient down-shifting materials in photovoltaics.
Energy Environ. Sci. 2016, 9, 1083 –1094.
Copyright The Royal Society of Chemistry 2016.

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