研究目的
To develop an optimized fabrication approach using entirely spray coating to fabricate textile organic solar cells (OSCs) with improved power conversion efficiency and durability.
研究成果
Fully spray-coated fabric solar cells on polyester cotton textiles achieve a PCE of 0.4% with improved yield and reduced short-circuits. Encapsulation enhances durability, allowing survival up to 90 days and 25 bending cycles, but further optimization of layer thicknesses and encapsulation permeability is needed for practical applications.
研究不足
The PCE of 0.4% is lower than previous formulations, and devices show significant variation in performance. Durability is limited, with cells failing after 30 bending cycles and degrading over time due to oxygen permeation. The process is sensitive to parameters, and complete negation of bending strains is not achievable due to textile properties.
1：Experimental Design and Method Selection:
The study uses spray coating as the primary method for depositing functional layers on textile substrates, with an interface layer to smooth the surface and an encapsulation layer for protection.
2：Sample Selection and Data Sources:
Standard woven 65/35 polyester cotton fabric is used as the substrate. Devices are fabricated in batches with varying active layer thicknesses.
3：List of Experimental Equipment and Materials:
Materials include silver nanowires (AgNW), zinc oxide nanoparticles (ZnO-NP), PEDOT:PSS, and active layer formulation PI-4 (supplied by InfinityPV). Equipment includes a spray coater, bending machine for cyclic tests, and characterization tools like SEM, J/V measurement setup, and UV-Vis spectrometer.
4：Experimental Procedures and Operational Workflow:
Steps involve screen printing an interface layer on the textile, spray coating functional layers (e.g., Ag-NP, ZnO-NP, active layer, PEDOT:PSS, AgNW), and depositing an encapsulation layer. Devices are tested for performance and durability through bending cycles.
5：Data Analysis Methods:
J/V characteristics are measured to determine PCE, VOC, JSC, and FF. Statistical analysis is performed on multiple devices, and EQE and UV-Vis spectra are analyzed.
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