Ultra-lightweight Flexible Perovskite–Perovskite–Organic Triple-Junction Tandem Solar Cells
Abstract
Triple-junction photovoltaics offer a promising route to surpass the efficiency limitations of single-junction solar cells, yet existing high-performance architectures are predominantly rigid and relatively heavy, limiting their use in weight-sensitive applications. Here, we report, to the best of our knowledge, the first ultra-lightweight and flexible monolithic perovskiteperovskite–organic triple-junction tandem solar cells. The devices integrate 2.05 eV and 1.62 eV perovskite front and middle subcells with a 1.33 eV organic bulk-heterojunction rear subcell on a 10 μm flexible polyethylene terephthalate substrate. The champion tandem device achieves a power conversion efficiency of 24.1%, with an open-circuit voltage of 3.27 V, a short-circuit current density of 9.32 mA/cm2, and a fill factor of 79.0%, corresponding to a power-per-weight of 11.2 W/g. The device exhibits a stabilized PCE of 24.6% under maximumpower-point tracking and negligible hysteresis between forward and reverse voltage scans. External quantum efficiency measurements yield closely matched integrated photocurrent densities of 9.39, 9.39, and 9.21 mA/cm2 for the three subcells, confirming efficient spectral utilization and current matching. These results establish flexible perovskite–perovskiteorganic triple-junction tandems as a promising platform for high-specific-power photovoltaics and open opportunities for lightweight energy harvesting in aerospace, unmanned aerial vehicles, wearable electronics, and portable power systems.
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BibTeX
@misc{isikgor2026ultralightweight,
title = {{Ultra-lightweight Flexible Perovskite–Perovskite–Organic Triple-Junction Tandem Solar Cells}},
author = {FURKAN H. ISIKGOR},
howpublished = {ChemRxiv},
year = {2026},
month = oct,
doi = {10.26434/chemrxiv.15010188/v1},
url = {https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010188/v1},
note = {CC BY},
}
RIS
TY - UNPB
TI - Ultra-lightweight Flexible Perovskite–Perovskite–Organic Triple-Junction Tandem Solar Cells
AU - FURKAN H. ISIKGOR
PY - 2026
DA - 2026/10/09
PB - ChemRxiv
DO - 10.26434/chemrxiv.15010188/v1
UR - https://chemrxiv.org/doi/full/10.26434/chemrxiv.15010188/v1
AB - Triple-junction photovoltaics offer a promising route to surpass the efficiency limitations of single-junction solar cells, yet existing high-performance architectures are predominantly rigid and relatively heavy, limiting their use in weight-sensitive applications. Here, we report, to the best of our knowledge, the first ultra-lightweight and flexible monolithic perovskiteperovskite–organic triple-junction tandem solar cells. The devices integrate 2.05 eV and 1.62 eV perovskite front and middle subcells with a 1.33 eV organic bulk-heterojunction rear subcell on a 10 μm flexible polyethylene terephthalate substrate. The champion tandem device achieves a power conversion efficiency of 24.1%, with an open-circuit voltage of 3.27 V, a short-circuit current density of 9.32 mA/cm2, and a fill factor of 79.0%, corresponding to a power-per-weight of 11.2 W/g. The device exhibits a stabilized PCE of 24.6% under maximumpower-point tracking and negligible hysteresis between forward and reverse voltage scans. External quantum efficiency measurements yield closely matched integrated photocurrent densities of 9.39, 9.39, and 9.21 mA/cm2 for the three subcells, confirming efficient spectral utilization and current matching. These results establish flexible perovskite–perovskiteorganic triple-junction tandems as a promising platform for high-specific-power photovoltaics and open opportunities for lightweight energy harvesting in aerospace, unmanned aerial vehicles, wearable electronics, and portable power systems.
ER -