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Il contributo descrive le attività svolte durante il progetto APOLLON, gli obiettivi raggiunti e gli indirizzi della ricerca per il miglioramento della tecnologia e la sua penetrazione nel mercato.
The first phase of the project has concerned the development of Fresnel lens (Point Focus) and Mirror based spectra splitting CPV systems. After the Mid-term meeting, hold on September 2011, the research has been re-addressed towards the development of high concentration mirror based CPV systems. The activities have been focalized on the development of the different components of the Concentrating Photovoltaic (CPV) systems and on some important modifications in the MOCVD growth apparatus, in order to assure higher CPV system performance, reliability, reduce the cost and environmental impact. In particular a new MOCVD heating system has been developed in order to better manage the solar cell layers stress and increase temperature uniformity, getting higher growth yield. III-V based multi-junction solar cells have been realized starting from advanced simulation program and then manufactured by using nanostructured coating and new metallic grid design. In order to widen the combination of semiconductor materials to be used to increase the value of the solar cell efficiency, new technological path attempting to growth in the same MOCVD growth chamber III-V and IV elements of the periodic table have been addressed. New primary and secondary mirrors have been developed with high concentrator factor. Optimized solar receivers for reducing the operative cell temperature along with intelligent solutions for accurate, reliable and cost effective tracking have been developed and tested. A Round Robin methodology has been applied for the CPV module characterization and a European campaign on the reliable measurements of the solar direct irradiation has been initiated in joint collaboration with the European SOPHIA project. A high concentration mirror based prototype system has been finally developed and the environmental and economic assessment carried out.
31 Dicembre 2013
Multi-APprOach for high efficiency integrated and inteLLigent CONcentrating PV modules (Systems) (APOLLON)