Improved Optics in Monolithic Perovskite/Silicon Tandem Solar Cells with a Nanocrystalline Silicon Recombination Junction
By Florent Sahli, Brett A. Kamino, J. Werner, M. Bräuninger, B. Paviet‐Salomon, L. Barraud, R. Monnard, J. Seif, A. Tomasi, Q. Jeangros and 6 more. 2018
230 citations recorded by the source corpus.
Perovskite/silicon tandem solar cells are increasingly recognized as promising candidates for next‐generation photovoltaics with performance beyond the single‐junction limit at potentially low production costs. Current designs for monolithic tandems rely on transparent conductive oxides as an intermediate recombination layer, which lead to optical losses and reduced shunt resistance. An improved recombination junction based on nanocrystalline silicon layers to mitigate these losses is demonstrated. When employed in monolithic perovskite/silicon heterojunction tandem cells with a planar front side, this junction is found to increase the bottom cell photocurrent by more than 1 mA cm−2. In combination with a cesium‐based perovskite top cell, this leads to tandem cell power‐conversion efficiencies of up to 22.7% obtained from J–V measurements and steady‐state efficiencies of up to 22.0% during maximum power point tracking. Thanks to its low lateral conductivity, the nanocrystalline silicon recombination junction enables upscaling of monolithic perovskite/silicon heterojunction tandem cells, resulting in a 12.96 cm2 monolithic tandem cell with a steady‐state efficiency of 18%.
Subfields: Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/64dc51885651dab302566dae26857a2a2fbc89b7
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In Electrical and Electronic Engineering
Citations in the corpus
- Monolithic all-perovskite tandem solar cells with 24.8% efficiency exploiting comproportionation to suppress Sn(ii) oxidation in precursor ink (2019, background): “parasitic absorption loss in near-infrared spectral range; but it also causes shunting between subcells which severely constrains the performance of large-area devices and prevents the cellto-cell monolithic integration in thin-film modules (31).”
- Grain Engineering for Perovskite/Silicon Monolithic Tandem Solar Cells with Efficiency of 25.4% (2019, unknown): “Steps have also been taken to improve fill factor (FF): for example, the power loss caused by the large sheet resistance of the front transparent conductive oxide (TCO) electrode was reduced by introducing a metallic grid.(10,18) However, the large Voc deficit remains a major hindrance for tandem de”