Loss Analysis of Halide-Perovskite Solar Cells Deposited on Textured Substrates
Wang, Y., Hüpkes, J., Ravishankar, S., Klingebiel, B. and Kirchartz, T. (2025), Loss Analysis of Halide-Perovskite Solar Cells Deposited on Textured Substrates. Sol. RRL, 9: 2400829. https://doi.org/10.1002/solr.202400829
The goal of this study was to analyze efficiency losses in halide-perovskite solar cells (PSCs) deposited on textured substrates, which are crucial for high-performance perovskite/silicon tandem devices.
Key findings revealed that textured substrates significantly improve light absorption and short-circuit current (Jsc), achieving 95.55% of the Shockley–Queisser (SQ) limit for a 1.68 eV bandgap. Compared to planar substrates, textured surfaces boosted Jsc by ~2 mA/cm² without negatively impacting the fill factor (FF). However, open-circuit voltage (Voc) losses remained similar for both cases. Transient photoluminescence (PL) measurements showed that recombination dynamics were dominated by shallow defects rather than deep traps, with no major impact from substrate morphology. Capacitive discharge effects at low carrier densities were also observed in full devices.
Fluxim’s Setfos simulation tool was used to model transient PL decay and analyze the influence of shallow traps and interfacial recombination. Setfos enabled detailed drift-diffusion simulations that supported the experimental findings, highlighting its value in linking recombination mechanisms to device architecture and performance.
These results are important because they provide clear design guidelines for minimizing efficiency losses when transitioning perovskite solar cells to textured silicon for tandem applications, supporting more efficient and stable tandem devices.