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Roll-to-roll printed stable and thickness-independent ZnO:PEI composite electron transport layer for inverted organic solar cells
摘要： Large-scale roll-to-roll (R2R) micro-gravure printing is one of the most e?ective fabrication techniques to achieve the commercialization of organic solar cells (OSCs). In the high-performance OSC devices, the electron transport layer (ETL) plays an important role. In this paper, a composite ink of ZnO and polyethylenimine (PEI) was developed to fabricate large-area ETL for the inverted OSCs through R2R micro-gravure printing. It was found that the modi?cation of ZnO nanoparticles by PEI e?ectively improved ink stability and enhanced the mechanical property. Using R2R micro-gravure printing, the thickness and coverage of the ZnO: PEI ?lms were well regulated through changing the printing roller speed and web speed. Consequently, a high-power conversion e?ciency around 6% was obtained for the ?exible PTB7-Th: PC71BM device with the thickness of R2R printed ZnO: PEI layer up to 120 nm, demonstrating the high printability of this ZnO: PEI composite material for the use in printed ?exible OSCs as the interface layer.
关键词： Organic solar cells,Roll-to-roll printing,Thickness-independent,Long-term stability,ZnO: PEI composite materials
更新于2025-09-16 10:30:52
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Rapid Fabrication of Thin Films for Perovskite Solar Cells
摘要： Rapid development of the thin film perovskite solar cells (PSCs) has resulted in research and development of these photovoltaic (PV) devices for automated manufacturing. Successful commercialization of PSC modules requires high throughput manufacturing with respect to the application of cheap materials and rapid cost-effective processing techniques. In this paper, several results pertinent to rapid roll-to-roll printing of the absorber and charge carrier transport thin films are presented. The successful fabrication of the processed thin films resulted in devices with 8.30% efficiency. Characterization was conducted through scanning electron microscope (SEM) and X-ray diffraction (XRD) spectroscopy which, in turn, delineated the susceptibility of our custom-made setup for successful up-scale manufacturing of PSCs.
关键词： spray coating,slot-die coating,rapid fabrication,intense pulsed light,Perovskite solar cells,thin films,roll-to-roll printing
更新于2025-09-16 10:30:52
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[Institution of Engineering and Technology 12th European Conference on Antennas and Propagation (EuCAP 2018) - London, UK (9-13 April 2018)] 12th European Conference on Antennas and Propagation (EuCAP 2018) - Roll-to-roll Reverse Offset Printing of Millimeter-wave Transmission Lines and Antennas on Flexible Substrates
摘要： We investigate the feasibility of roll-to-roll reverse offset (R2R-RO) printing technology for the mass fabrication of millimeter-wave antennas on ?exible substrates. In this study, samples of coplanar waveguide (CPW) transmission lines and microstrip patch antennas were manufactured and measured. The results indicate that the R2R-RO printing technique can be an excellent candidate for the production of millimeter-wave and terahertz devices, since it has the advantage of low cost and high resolution.
关键词： ?exible substrate,roll-to-roll printing,antenna,millimeter wave,measurement
更新于2025-09-04 15:30:14