Abstract
Amorphous germanium-based solar cells exploiting second-order Fabry–Perot resonances can reach strong infrared absorption with an absorber thickness of either 25 nm or less. Hence, they are a promising candidate for the replacement of micrometer-thick μc-Si:H bottom cells in a-Si:H/μc-Si:H tandem configurations. Here, we present a detailed experimental and simulation-aided analysis of the optical properties of such devices, with a particular focus on their potential application in the tandem cells. A clear relation of the results to the field profile inside the cavity was found, and guiding rules for optimization are deduced. By modeling the transmission behavior of an a-Si:H top cell, we evaluate the potential of the fabricated devices for tandem cell application, allowing a benchmark against μc-Si:H solar cells. The best sample was found to enable a tandem cell performance equivalent to a μc-Si:H bottom device reaching 5% single cell efficiency.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
