1.
I M Hossain; Y J Donie; R Schmager; M S Abdelkhalik; M Rienäcker; T F Wietler; R Peibst; A Karabanov; J A Schwenzer; S Moghadamzadeh; U Lemmer; B S Richards; G Gomard; U W Paetzold
Nanostructured front electrodes for perovskite/c-Si tandem photovoltaics Artikel
In: Opt. Express, Bd. 28, Nr. 6, S. 8878-8897, 2020.
@article{Hossain2020,
title = {Nanostructured front electrodes for perovskite/c-Si tandem photovoltaics},
author = {I M Hossain and Y J Donie and R Schmager and M S Abdelkhalik and M Rienäcker and T F Wietler and R Peibst and A Karabanov and J A Schwenzer and S Moghadamzadeh and U Lemmer and B S Richards and G Gomard and U W Paetzold},
doi = {10.1364/OE.382253},
year = {2020},
date = {2020-03-01},
journal = {Opt. Express},
volume = {28},
number = {6},
pages = {8878-8897},
publisher = {OSA},
abstract = {The rise in the power conversion efficiency (PCE) of perovskite solar cells has triggered enormous interest in perovskite-based tandem photovoltaics. One key challenge is to achieve high transmission of low energy photons into the bottom cell. Here, nanostructured front electrodes for 4-terminal perovskite/crystalline-silicon (perovskite/c-Si) tandem solar cells are developed by conformal deposition of indium tin oxide (ITO) on self-assembled polystyrene nanopillars. The nanostructured ITO is optimized for reduced reflection and increased transmission with a tradeoff in increased sheet resistance. In the optimum case, the nanostructured ITO electrodes enhance the transmittance by $sim$7% (relative) compared to planar references. Perovskite/c-Si tandem devices with nanostructured ITO exhibit enhanced short-circuit current density (2.9 mA/cm2 absolute) and PCE (1.7% absolute) in the bottom c-Si solar cell compared to the reference. The improved light in-coupling is more pronounced for elevated angle of incidence. Energy yield enhancement up to $sim$10% (relative) is achieved for perovskite/c-Si tandem architecture with the nanostructured ITO electrodes. It is also shown that these nanostructured ITO electrodes are also compatible with various other perovskite-based tandem architectures and bear the potential to improve the PCE up to 27.0%.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The rise in the power conversion efficiency (PCE) of perovskite solar cells has triggered enormous interest in perovskite-based tandem photovoltaics. One key challenge is to achieve high transmission of low energy photons into the bottom cell. Here, nanostructured front electrodes for 4-terminal perovskite/crystalline-silicon (perovskite/c-Si) tandem solar cells are developed by conformal deposition of indium tin oxide (ITO) on self-assembled polystyrene nanopillars. The nanostructured ITO is optimized for reduced reflection and increased transmission with a tradeoff in increased sheet resistance. In the optimum case, the nanostructured ITO electrodes enhance the transmittance by $sim$7% (relative) compared to planar references. Perovskite/c-Si tandem devices with nanostructured ITO exhibit enhanced short-circuit current density (2.9 mA/cm2 absolute) and PCE (1.7% absolute) in the bottom c-Si solar cell compared to the reference. The improved light in-coupling is more pronounced for elevated angle of incidence. Energy yield enhancement up to $sim$10% (relative) is achieved for perovskite/c-Si tandem architecture with the nanostructured ITO electrodes. It is also shown that these nanostructured ITO electrodes are also compatible with various other perovskite-based tandem architectures and bear the potential to improve the PCE up to 27.0%.