Modulated surface texturing of temporary Al foils substrates for high-efficiency thin-film, flexible solar cells

Modulated surface texturing of temporary Al foils substrates for high-efficiency thin-film, flexible solar cells

Limodio, G. (TU Delft Photovoltaic Materials and Devices)
Bartesaghi, Davide (HyET Solar Netherlands)
Hietkamp, Maurice (HyET Solar Netherlands)
Rajagopal, D. (TU Delft Electrical Engineering, Mathematics and Computer Science)
Nawaratne, Sajith (Student TU Delft)
Hamers, Edward (HyET Solar Netherlands)
Smets, A.H.M. (TU Delft Photovoltaic Materials and Devices)

Electrical Engineering, Mathematics and Computer Science

2020

In this work we focus on texturing Al substrate in order to employ the modulated surface texturing approach for thin-film, flexible, micromorph solar cells. We deployed two different methods to induce micro-craters in Al foil, i) bare Al etching by KOH and ii) AZO sacrificial layer etched in KOH. After modelling the etching kinetics of KOH on Al, we characterized the 2D correlation length and rms roughness of these samples and find the optimal aspect ratio of 12% to deposit high-quality 3 µm-thick nc-Si. Finally, excellent angular scattering properties have been measured for both employed methods.

Al substrate
etching
flexible
thin-film solar cells

http://resolver.tudelft.nl/uuid:a52782db-b089-473d-adf7-935e68dbe61c

https://doi.org/10.1109/PVSC45281.2020.9300722

Institute of Electrical and Electronics Engineers (IEEE)

9781728161150

2020 47th IEEE Photovoltaic Specialists Conference, PVSC 2020

47th IEEE Photovoltaic Specialists Conference, PVSC 2020, 2020-06-15 → 2020-08-21, Calgary, Canada

Conference Record of the IEEE Photovoltaic Specialists Conference, 0160-8371, 2020-June

Institutional Repository

conference paper

© 2020 G. Limodio, Davide Bartesaghi, Maurice Hietkamp, D. Rajagopal, Sajith Nawaratne, Edward Hamers, A.H.M. Smets