- 标题
- 摘要
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- 实验方案
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Fabrication of indium tin oxide free bulk heterojunction organic solar cells using inkjet-printed silver grids and PEDOT: PSS
摘要： In this article, we discuss the inkjet printing of silver nanoparticle ink and PEDOT: PSS (poly (3,4-ethylene dioxythiophene) polystyrene sulfonate) for indium tin oxide-free organic solar cells. We observed that the significant parameters for the printing of silver nanoparticle ink and PEDOT: PSS are waveform parameters voltage and time, substrate temperature, drop spacing and annealing temperature. Organic solar cells were fabricated over grids with three different line spacing (1mm, 2mm and 3mm) and better performance was observed for grids with 2 mm spacing. The figure of limit, which is the ratio between the optical transmission and sheet resistance, was used as a tool to evaluate the performance of the current collecting grid. The figure of limit was high for grids with 2 mm spacing (21.11 × 10?3??1), which confirmed the experimental results.
关键词： Inkjet printing,ITO free organic solar cells,PEDOT: PSS,silver grid
更新于2025-09-16 10:30:52
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[IEEE 2019 49th European Microwave Conference (EuMC) - Paris, France (2019.10.1-2019.10.3)] 2019 49th European Microwave Conference (EuMC) - Optimizing the Conductivity of Ink-Jet Printed Microwave Components on Polymer Substrates by Laser Sintering
摘要： In this work, microwave components were printed on a Kapton (polyimide) substrate using a Drop-On-Demand (DOD) ink jet printer with silver nanoparticle ink. Two different laser curing strategies are presented by implementing selective sintering. The measured improvement of the achieved conductivity is between 70 and 100% for such resonators from 5 to 15 GHz.
关键词： Kapton (PI),Electrical conductivity,Polymer substrates,laser sintering,Microwave components,Inkjet printing
更新于2025-09-16 10:30:52
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A Low Loss Quantum-dot-doped Optical Fiber Temperature Sensor Based on Flexible Print Technology
摘要： A quantum dots optical fiber (QDOF) sensor is proposed for temperature sensing in this paper. The sensor is fabricated by the drop-on-demand inkjet printing technology. By controlling the diameter of droplet, the spacing between droplets and the number of printed layers, the QDOF is printed on the polymer substrate. The loss of QDOF is less than 0.35dB·mm-1 at the fluorescence wavelength. The experimental results show that the temperature sensitivity of sensor is 109pm/℃. As far as we know, this is the first time that a QDOF sensor is manufactured by the inkjet printing technology to realize the temperature measurement.
关键词： inkjet printing,quantum dots fiber,temperature sensor
更新于2025-09-16 10:30:52
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AIP Conference Proceedings [AIP Publishing INTERNATIONAL SYMPOSIUM ON GREEN AND SUSTAINABLE TECHNOLOGY (ISGST2019) - Perak, Malaysia (23–26 April 2019)] INTERNATIONAL SYMPOSIUM ON GREEN AND SUSTAINABLE TECHNOLOGY (ISGST2019) - Advanced metallization with low silver consumption for silicon heterojunction solar cells
摘要： In this work, three industry-related metallization approaches for silicon heterojunction (SHJ) solar cells are presented which are aiming for a reduction of silver consumption compared to conventional screen-printing of low-temperature silver pastes. The presented results are achieved on large-area cells (area of 244.3 cm2). Firstly, the cell results reveal that with silver-coated copper pastes for screen-printing comparable results as with pure silver pastes can be achieved but with a potentially reduced silver consumption of 30%. Median efficiencies of 21.6% are achieved in both cases utilizing a five busbar cell design. A second approach to reduce the silver consumption is the use of inkjet-printing. The influence of the inkjet-printed layer number per contact finger on the cell performance of busbarless cells is investigated. A maximum conversion efficiency of 23.3% of an inkjet-printed solar cell is achieved within this study. Thirdly, a novel printing technology established at Fraunhofer ISE, called FlexTrail-printing, is introduced. By utilizing the same Ag nanoparticle ink like in the case of inkjet-printing, the finger width is reduced from 75 ± 1 μm down to 16 ± 1 μm on alkaline textured SHJ solar cells. To the authors’ knowledge, this is the smallest feature size ever published on ITO-coated, textured silicon surfaces. A maximum conversion efficiency of 23.7% is measured (busbarless cell). Only 0.3 ± 0.1 mg Ag nanoparticle ink is consumed during FlexTrail-printing on a large-area wafer with a front grid of 80 fingers.
关键词： metallization,silicon heterojunction solar cells,FlexTrail-printing,silver consumption,screen-printing,inkjet-printing
更新于2025-09-12 10:27:22
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POLED displays: Robust printing of pixels
摘要： The fabrication of a high-quality polymeric organic light emitting diode display requires the deposition of identical, uniform ?uid ?lms into a large number of shallow recessed regions that form a regular array of pixels on a display backplane. We determine the protocols required to achieve continuous liquid coverage of the entire pixel area for the case where equally spaced ?uid droplets are sequentially printed along a straight line within a stadium-shaped pixel and explore how these protocols depend on the wetting properties of the pixel surface. Our investigation uses a combination of experiments and numerical modeling, based on the assumption of ?uid redistribution via capillary spreading according to a Cox-Voinov law. We show that the model is able to predict quantitatively the evolution of the liquid deposited in a pixel and provides a computationally inexpensive design tool to determine ef?cient printing strategies that account for uncertainties arising from imperfect substrate preparation or printhead dysfunction.
关键词： pixel fabrication,POLED displays,inkjet printing,capillary spreading,Cox-Voinov law
更新于2025-09-12 10:27:22
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[IEEE 2019 IEEE 2nd International Conference on Electronics Technology (ICET) - Chengdu, China (2019.5.10-2019.5.13)] 2019 IEEE 2nd International Conference on Electronics Technology (ICET) - Efficient Top-emitting Quantum Dot Light Emitting Diodes via Inkjet Printing
摘要： In this work, we report inkjet-printed top-emitting (TE) quantum dot light emitting diodes (QLEDs) for achieving high-resolution QLED displays. At the luminance of 1000 cd/m2, the TE devices exhibit a current efficiency of 5.90 cd/A which is 2.7-fold higher than 2.18 cd/A of the conventional bottom-emitting (BE) devices. The significant enhancement is owing to the well-controlled cavity length which is easy for inkjet printing.
关键词： QLEDs,top-emitting structures,inkjet printing,coffee ring,Quantum dot
更新于2025-09-12 10:27:22
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Exploiting supramolecular assemblies for filterless ultra-narrowband organic photodetectors with inkjet fabrication capability
摘要： Narrowband photodetectors are useful for a myriad of applications involving color discrimination as well as biological imaging and machine vision. Prevalent devices use broadband light absorbing materials in conjunction with electric (charge collection narrowing, photo multiplication) and optical strategies (optical cavity) to narrow down the spectral response of the detector. Here we exploit the intrinsic narrow absorption width of B13–50 nm peculiar to J-aggregates of strongly coupled cyanine dye molecules for narrowband photodetectors. Albeit using ultrathin J-aggregate films (10 nm) unparalleled optical aggregate properties lead to high external quantum efficiency (15%) and response speed (15 kHz) at low bias voltage ((cid:2)1 V). We show that the self-assembly process and device architecture used permit the incorporation of J-aggregates of various cyanine dyes with photodetection maxima ranging from the visible to the near-infrared region up to 1000 nm. Narrow bandwidth (o50 nm) photodetectors fabricated by inkjet printing the active device layers including the J-aggregate film perform on par with spin-coated devices, thus underlining their industrial potential.
关键词： J-aggregates,organic photodetectors,cyanine dyes,narrowband photodetectors,inkjet printing
更新于2025-09-12 10:27:22
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Inkjet‐Printed Micrometer‐Thick Patterned Perovskite Quantum Dot Films for Efficient Blue‐to‐Green Photoconversion
摘要： Perovskite materials have attracted great attention as a potential color conversion material in the display field recently. However, preparing a large and thick patterned film remains to be a key challenge. Here, a patterned CsPbBr3 quantum dot color conversion layer is prepared using the inkjet-printing and UV-curing method. The prepared 6 μm film exhibits a uniform morphology without coffee-ring effect. Green emission is achieved with a brightness of 58 cd m?2 and narrow emission band is achieved using the 345 cd m?2 blue OLED excitation light. Furthermore, only 1.4% of decay in brightness is observed after the film is exposed to ambient environment for 1 month without any protection. Finally, a 6.6 in. active matrix perovskite quantum dot display prototype is demonstrated using the blue OLED backlight with 384 × 300 resolution for the first time.
关键词： color conversion,displays,inkjet printing,perovskite quantum dots
更新于2025-09-12 10:27:22
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Solution-Processed Oxide Complementary Inverter via Laser Annealing and Inkjet Printing
摘要： Metal–oxide–semiconductors (MOS) have become an ideal candidate for the next-generation optoelectronic device applications. However, high processing temperature and complicate processes are still tremendous challenge in developing solution-based complementary MOS (CMOS) inverter. In this article, for the first time, femtosecond (fs) laser was used to realize controllable annealing for solution-based CMOS inverter. The achievement of nonstoichiometric p-type oxide thin films was ascribed to the photo-assisted conversion of precursor to metal–oxide (M–O) lattices along with the formation of atom vacancies in oxide lattice due to carrier excitation and relaxation using laser annealing (LA). The field effect mobility of the p- and n-type M–O thin-film transistors (TFTs) with inkjet printing (IJP) and LA was 0.91 and 7.07 cm2/V·s, respectively. Moreover, location control capacity was exploited to separately anneal the p- and n-type oxide deposited with IJP for the fabrication of TFTs, which significantly simplified the fabrication process of the inverter. CMOS inverter with high noise margin and moderate voltage gain above 10 was also obtained. Our work significantly improved the ability to selectively manipulate the functionality and properties of the irradiated materials. The results demonstrated that logic gates based on all-oxide can be large area integrated using our strategy, exhibiting attractive properties and applications of the CMOS integrated circuits in oxide electronics.
关键词： p-type oxide semiconductor,inkjet printing (IJP),Complementary inverter,femtosecond (fs) laser annealing (LA),thin-film transistors (TFTs)
更新于2025-09-12 10:27:22
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Inkjet‐Printed Micrometer‐Thick Perovskite Solar Cells with Large Columnar Grains
摘要： Transferring the high power conversion efficiencies (PCEs) of spin-coated perovskite solar cells (PSCs) on the laboratory scale to large-area photovoltaic modules requires a significant advance in scalable fabrication methods. Digital inkjet printing promises scalable, material, and cost-efficient deposition of perovskite thin films on a wide range of substrates and in arbitrary shapes. In this work, high-quality inkjet-printed triple-cation (methylammonium, formamidinium, and cesium) perovskite layers with exceptional thicknesses of >1 μm are demonstrated, enabling unprecedentedly high PCEs > 21% and stabilized power output efficiencies > 18% for inkjet-printed PSCs. In-depth characterization shows that the thick inkjet-printed perovskite thin films deposited using the process developed herein exhibit a columnar crystal structure, free of horizontal grain boundaries, which extend over the entire thickness. A thin film thickness of around 1.5 μm is determined as optimal for PSC for this process. Up to this layer thickness X-ray photoemission spectroscopy analysis confirms the expected stoichiometric perovskite composition at the surface and shows strong deviations and inhomogeneities for thicker thin films. The micrometer-thick perovskite thin films exhibit remarkably long charge carrier lifetimes, highlighting their excellent optoelectronic characteristics. They are particularly promising for next-generation inkjet-printed perovskite solar cells, photodetectors, and X-ray detectors.
关键词： perovskite solar cells,high diffusion lengths,inkjet printing,large columnar crystal grains
更新于2025-09-12 10:27:22