Lacunary polyoxometalate nanoclusters as versatile interface modifiers for perovskite solar cells
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
We report the first incorporation of diverse lacunary polyoxometalate (POM) nanocluster materials as efficient interface modifiers in perovskite solar cells (PSCs). Devices utilizing POM-modified SnO2 electron transport layers demonstrated marked improvements in open-circuit voltage (VOC), short-circuit current density (JSC), and fill factor (FF), achieving power conversion efficiencies exceeding 21.6%. Transient photovoltage and photocurrent analyses revealed that the B1-type based device exhibited the longest carrier lifetime and most rapid charge extraction rate, indicating optimized charge transport and suppressed recombination losses. Stability assessments under ambient conditions confirmed that B1-type POM-modified devices retained higher efficiency over time with reduced hysteresis compared to control devices. Work function measurements indicated POM-induced energy level alignment shifts, facilitating efficient charge transport. Morphological and structural analyses via scanning electron microscopy and X-ray diffraction confirmed that POMs using tungsten (W) addenda (i.e., B1–W and B2–W) promoted superior perovskite crystallization, yielding larger grain sizes and enhanced crystallinity. These findings establish the potential for lacunary POMs to serve as effective interface modifiers for advancing the efficiency and durability of perovskite-based optoelectronic devices.
Date Acceptance
2026-03-24
Citation
Scientific Reports
ISSN
2045-2322
Publisher
Nature Portfolio
Journal / Book Title
Scientific Reports
Copyright Statement
Copyright This paper is embargoed until publication. Once published the Version of Record (VoR) will be available on immediate open access.
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Publication Status
Accepted