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A Sputtered Gig-Lox TiO<sub>2</sub> Sponge Integrated with CsPbI<sub>3</sub>:EuI<sub>2</sub> for Semitransparent Perovskite Solar Cells.

ABSTRACT: In this study, we propose a novel approach where in an innovative porous grazing incidence atomic flux coupled with local oxidation (gig-lox) TiO2 electron transport layer (ETL), deposited by sputtering, is integrated with a fully inorganic CsPbI3:EuI2 perovskite. This combination is used as a photoactive layer in semitransparent perovskite solar cells (ST-PSC). The solvent-free, scalable porous oxide sponge-like in structure, is produced via a grazing-incidence Ti flux that undergoes localized progressive oxidation. The sponge offers ≈50% volume porosity that is available for perovskite infiltration. The result of the oxide-perovskite integration is a double-layer struc made of a perovskite-filled sponge covered by a cap of pure perovskite. The material has unique optical properties and structure as attested by spectroscopic ellipsometry and X-ray diffraction analyses. The double-layer structure exhibits semitransparency, and its reduced photoluminescence (PL) intensity relative to that of a single perovskite layer indicates efficient charge carrier injection into the porous TiO2. In perspective, the layer can be used in PSC as demonstrated by simulations.

SUBMITTER: Spampinato C 

PROVIDER: S-EPMC12434809 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature

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A Sputtered Gig-Lox TiO&lt;sub&gt;2&lt;/sub&gt; Sponge Integrated with CsPbI&lt;sub&gt;3&lt;/sub&gt;:EuI&lt;sub&gt;2&lt;/sub&gt; for Semitransparent Perovskite Solar Cells.

Spampinato C C   Calogero G G   Mannino G G   Valastro S S   Smecca E E   Arena V V   La Magna P P   Bongiorno C C   Fazio E E   Alberti A A  

The journal of physical chemistry. C, Nanomaterials and interfaces 20250831 36

In this study, we propose a novel approach where in an innovative porous grazing incidence atomic flux coupled with local oxidation (gig-lox) TiO<sub>2</sub> electron transport layer (ETL), deposited by sputtering, is integrated with a fully inorganic CsPbI<sub>3</sub>:EuI<sub>2</sub> perovskite. This combination is used as a photoactive layer in semitransparent perovskite solar cells (ST-PSC). The solvent-free, scalable porous oxide sponge-like in structure, is produced via a grazing-incidence  ...[more]

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