Manipulating the Macroscopic and Microscopic Morphology of Large‐Area Gravure‐Printed ZnO Films for High‐Performance Flexible Organic Solar Cells
نویسندگان
چکیده
Gravure printing is a promising large-scale fabrication method for flexible organic solar cells (FOSCs) because it compatible with two-dimension patternable roll-to-roll fabrication. However, the unsuitable rheological property of ZnO nanoinks resulted in unevenness and looseness gravure-printed interfacial layer. Here we propose strategy to manipulate macroscopic microscopic films through using mixed solvent poly(vinylpyrrolidone) (PVP) additive. The regulation drying speed effectively manipulates droplets fusion leveling process eliminates ribbing structure morphology. additive PVP regulates improves compactness films. Following this method, large-area ZnO:PVP (28 × 9 cm2) excellent uniformity, compactness, conductivity, bending durability were fabricated. power conversion efficiencies FOSCs AgNWs reached 14.34% 17.07% 1 cm2 PM6:Y6 PM6:L8-BO devices. efficiency highest value date FOSCs. use addition also significantly enlarged window ink, ensuring high-quality printed thin thicknesses varying from 30 100 nm.
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ژورنال
عنوان ژورنال: Energy & environmental materials
سال: 2023
ISSN: ['2575-0348', '2575-0356']
DOI: https://doi.org/10.1002/eem2.12592