title: Study of a micro-concentrated photovoltaic system based on Cu(In,Ga)Se2microcells array.
abstract: We study a micro-concentrated photovoltaic (CPV) system based on micro solar cells made from a thin film technology, Cu(In,Ga)Se2. We designed, using the ray-tracing software Zemax OpticStudio 14, an optical system adapted and integrated to the microcells, with only spherical lenses. The designed architecture has a magnification factor of 100× for an optical efficiency of 85% and an acceptance angle of ±3.5°, without anti-reflective coating. An experimental study is realized to fabricate the first generation prototype on a 5  cm×5  cm substrate. A mini-module achieved a concentration ratio of 72× under AM1.5G, and an absolute efficiency gain of 1.8% for a final aperture area efficiency of 12.6%.
authors.forename: Sebastien
authors.initials: S
authors.lastname: Jutteau
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Guillemoles
authors.forename: Myriam
authors.initials: M
authors.lastname: Paire