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  4. Development and Outdoor Characterization of a Hybrid Bifacial HCPV Module
 
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2020
Journal Article
Title

Development and Outdoor Characterization of a Hybrid Bifacial HCPV Module

Abstract
Conversion of direct, diffuse, and albedo irradiance into electricity is demonstrated with a new kind of hybrid bifacial high‐concentration photovoltaic module named bifacial EyeCon. It consists of Fresnel lenses that concentrate the direct sunlight 321x onto III‐V triple‐junction solar cells that are mounted on the front surface of p‐PERC bifacial c‐Si cells. Thus, the Si absorbs the front and rear diffuse irradiance. Because III‐V and Si cells are electrically isolated (hence a 4‐terminal device) but thermally coupled by a dielectric adhesive, Si also acts as a heat distributing substrate. To accommodate the concentrator cells, we adapted the metallization layout and also optimized it for low intensity, ie, 200 W/m2 on the front and 100 W/m2 on the rear, using finite element network simulation. Additionally, when the concentrator cells are mounted on a bifacial Si cell instead of a metal heat distributor, their operating temperature is 16 K higher. However, we demonstrate with outdoor measurements that the power output of the bifacial EyeCon module reaches up to 326 W/m2 when the direct to global irradiance ratio is 92%. At a lower fraction of 70% the bifacial Si cells augment the power output of the III‐V string by 19%rel.
Author(s)
Martínez Sánchez, Juan Francisco
Steiner, Marc  
Wiesenfarth, Maike  
Fellmeth, Tobias  
Dörsam, Tobias
Wiese, Martin
Glunz, Stefan W.  
Dimroth, Frank  
Journal
Progress in Photovoltaics  
Open Access
DOI
10.1002/pip.3239
Additional full text version
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Language
English
Fraunhofer-Institut für Solare Energiesysteme ISE  
Keyword(s)
  • Photovoltaik

  • III-V und Konzentrator-Photovoltaik

  • III-V Epitaxie und Solarzellen

  • Konzentrator-Bauelemente

  • Hochkonzentrierende Systeme (HCPV)

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