Micro-concentrator solar cells offer an attractive way to further enhance the efficiency of planar-cell technologies while saving absorber material. Here, two laser-based bottom-up processes for the fabrication of regular arrays of CuInSe and Cu(In,Ga)Se microabsorber islands are presented, namely one approach based on nucleation and one based on laser-induced forward transfer. Additionally, a procedure for processing these microabsorbers to functioning micro solar cells connected in parallel is demonstrated. The resulting cells show up to 2.9% efficiency and a significant efficiency enhancement under concentrated illumination.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6296429 | PMC |
| http://dx.doi.org/10.3762/bjnano.9.281 | DOI Listing |
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