Publication

Buried-Interface Engineering Enables Record Flexible Semitransparent Perovskite Solar Cells and 27.7% Flexible Perovskite/Silicon Four-Terminal Tandems

2026

Abstract

Flexible semitransparent perovskite solar cells (FS-PSCs) are promising for lightweight PV and flexible tandem top cells, yet high efficiency and mechanical stability are hard to achieve simultaneously. Herein, we develop a buried-interface engineering strategy via neopentylammonium iodide (NPAI) modification on SnO2/perovskite together with a low-loss flexible IZO/Cu-grid electrode. NPAI reconstructs the buried interface, improves crystallinity, and suppresses nonradiative recombination. The optimized FS-PSCs achieve a champion efficiency of 21.4% and average 61.3% NIR transmittance (800−1200 nm), featuring outstanding operational stability over 500 h of maximum power point (MPP) tracking and 94.5% efficiency retention after 2000 bending cycles (10 mm radius). By integrating this semitransparent absorber, all-flexible perovskite/silicon four-terminal tandems reach a record 27.7% power conversion efficiency (PCE), setting a benchmark for flexible tandem photovoltaics.

Official source

https://infoscience.epfl.ch/entities/publication/ac7b05ca-f796-4dcc-8319-b9d6f557beaa

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2026

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/ac7b05ca-f796-4dcc-8319-b9d6f557beaa

About this result

Related concepts (25)

Perovskite solar cell

A perovskite solar cell (PSC) is a type of solar cell that includes a perovskite-structured compound, most commonly a hybrid organic–inorganic lead or tin halide-based material as the light-harvesting active layer. Perovskite materials, such as methylammonium lead halides and all-inorganic cesium lead halide, are cheap to produce and simple to manufacture. Solar-cell efficiencies of laboratory-scale devices using these materials have increased from 3.8% in 2009 to 25.

Thin-film solar cell

Thin-film solar cells are made by depositing one or more thin layers (thin films or TFs) of photovoltaic material onto a substrate, such as glass, plastic or metal. Thin-film solar cells are typically a few nanometers (nm) to a few microns (μm) thick–much thinner than the wafers used in conventional crystalline silicon (c-Si) based solar cells, which can be up to 200 μm thick. Thin-film solar cells are commercially used in several technologies, including cadmium telluride (CdTe), copper indium gallium diselenide (CIGS), and amorphous thin-film silicon (a-Si, TF-Si).

Timeline of solar cells

In the 19th century, it was observed that the sunlight striking certain materials generates detectable electric current – the photoelectric effect. This discovery laid the foundation for solar cells. Solar cells have gone on to be used in many applications. They have historically been used in situations where electrical power from the grid was unavailable. As the invention was brought out it made solar cells as a prominent utilization for power generation for satellites.

Related publications (32)

Buried-Interface Engineering Enables Record Flexible Semitransparent Perovskite Solar Cells and 27.7% Flexible Perovskite/Silicon Four-Terminal Tandems

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Tracking charge, spin and light polarization in space & time for photovoltaics and beyond

Synergistic Dual Engineering of NiO x via Ethylenediamine Chelation and γ‐Ray Irradiation for Enhanced Interfacial Transport in Perovskite Solar Cells

Buried-Interface Engineering Enables Record Flexible Semitransparent Perovskite Solar Cells and 27.7% Flexible Perovskite/Silicon Four-Terminal Tandems

Chat with Graph Search

Integrated memristor for mitigating reverse-bias in perovskite solar cells

Tracking charge, spin and light polarization in space &amp; time for photovoltaics and beyond

Synergistic Dual Engineering of NiO x via Ethylenediamine Chelation and γ‐Ray Irradiation for Enhanced Interfacial Transport in Perovskite Solar Cells

Tracking charge, spin and light polarization in space & time for photovoltaics and beyond