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Molecular Disaggregation-Bridging Engineered SnO2 Interfaces for Scalable Perovskite Photovoltaics
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PRE
AI
H
L
王
Q
J
H
Z
Y
DOI：10.1002/aenm.71419.png)
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Abstract
En 中文
Scalable perovskite photovoltaics are limited by the coupled challenges of unstable SnO2 colloids and defect-rich buried interfaces, which together undermine film uniformity and charge extraction. While existing strategies typically target either colloidal stabilization or interface passivation alone, their single-function nature restricts effectiveness for large-area processing. Here, we introduce potassium dihydrogen phosphate (KH2PO4) as a dual-functional modifier that produces a molecular disaggregation–bridging effect (MDBE). Dihydrogen phosphate anions regulate the colloidal organization of commercial SnO2 dispersions, contributing to smoother and more uniform electron-transport layers, while simultaneously establishing phosphate-mediated interfacial coordination at the buried SnO2/perovskite interface. This integrated regulation suppresses trap-assisted recombination and promotes uniform perovskite crystallization. Consequently, perovskite devices fabricated via blade coating in combination with vacuum evaporation reach a PCE of 25.34%, and 5 × 5 cm2 modules (12 cm2 active area) deliver 23.16% with only 8% loss upon scaling. MDBE thereby provides a unified and cost-effective interface-engineering strategy that overcomes the limitations of conventional single-function additives, enabling reliable and high-performance large-area perovskite photovoltaics.
Keywords:
blade-coating
electron-transport layer scalability
interface engineering
perovskite solar modules
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26
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10.0K
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15.7W
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