We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Efficiency Improvement of Near‐Stoichiometric CuInSe<sub>2</sub> Solar Cells for Application in Tandem Devices.
- Authors
Feurer, Thomas; Carron, Romain; Torres Sevilla, Galo; Fu, Fan; Pisoni, Stefano; Romanyuk, Yaroslav E.; Buecheler, Stephan; Tiwari, Ayodhya N.
- Abstract
State‐of‐the‐art Cu(In,Ga)Se2 (CIGS) solar cells are grown with considerably substoichiometric Cu concentrations. The resulting defects, as well as potential improvements through increasing the Cu concentration, have been known in the field for many years. However, so far, cells with high Cu concentrations show decreased photovoltaic parameters. In this work, it is shown that RbF postdeposition treatment of CuInSe2 solar cells allows for capturing the benefits from the improved absorber quality with increasing Cu content. A reduced defect density and an increased doping level for cells with high Cu concentrations close to stoichiometry are demonstrated. Implementing a high mobility front transparent conductive oxide (TCO), the improved absorbers with 1.00 eV bandgap yield a solar cell efficiency of 19.2%, and combined with a perovskite top cell a 4‐terminal tandem efficiency of 25.0% are demonstrated, surpassing the record efficiency of both subcell technologies.
- Subjects
SOLAR cells; SILICON solar cells; PHOTOVOLTAIC cells; SOLAR cell efficiency
- Publication
Advanced Energy Materials, 2019, Vol 9, Issue 35, pN.PAG
- ISSN
1614-6832
- Publication type
Article
- DOI
10.1002/aenm.201901428