研究目的
Investigating the development and application of a composite ink of ZnO and polyethylenimine (PEI) for fabricating large-area electron transport layers (ETL) for inverted organic solar cells (OSCs) through roll-to-roll (R2R) micro-gravure printing, focusing on improving ink stability, mechanical properties, and device performance.
研究成果
The study successfully developed a ZnO:PEI composite ink for fabricating ETLs in inverted OSCs using R2R micro-gravure printing. The composite ink showed improved stability and mechanical properties, enabling the fabrication of OSCs with high PCE even at thick ETL layers. This demonstrates the potential of ZnO:PEI composites for use in printed flexible OSCs.
研究不足
The study focuses on the development and application of ZnO:PEI composite inks for ETLs in OSCs, with limitations including the specific materials used (PTB7-Th:PC71BM) and the focus on inverted OSC structures. The scalability and cost-effectiveness of the R2R printing process for commercial production were not extensively discussed.
1：Experimental Design and Method Selection:
The study involved developing a composite ink of ZnO and PEI for fabricating ETLs for inverted OSCs using R2R micro-gravure printing. The method selection was based on the need for large-area fabrication and the advantages of micro-gravure printing.
2：Sample Selection and Data Sources:
ZnO nanoparticles were synthesized and modified with PEI to prepare the composite ink. The performance of the ink and the fabricated OSCs were evaluated.
3：List of Experimental Equipment and Materials:
Equipment included a micro-gravure printing setup, SEM for morphology characterization, and a solar simulator for device performance evaluation. Materials included ZnO nanoparticles, PEI, PTB7-Th, and PC71BM.
4：Experimental Procedures and Operational Workflow:
The composite ink was prepared and used to fabricate ETLs via R2R micro-gravure printing. The thickness and coverage of the films were regulated by adjusting printing parameters. The OSCs were then fabricated and their performance evaluated.
5：Data Analysis Methods:
The performance of the OSCs was analyzed based on power conversion efficiency (PCE), and the morphology of the films was analyzed using SEM.
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