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High-performance flexible transparent nanomesh electrodes
摘要： A cost-effective process for producing high-performance Ag-paste-based flexible transparent nanomesh electrodes was developed by optimizing their linewidth, pitch, and height. These nanomesh electrodes, with a linewidth of several hundred nanometers and a pitch of 10–200 μm on a PET substrate, achieved wide ranges of transmittance (83.1–98.8%) and sheet resistance (1.2–30.9 Ω/sq) and a figure of merit (992–1619) superior to those of indium tin oxide (ITO) and silver nanowire (AgNW) electrodes. Our evaluation of their flexibility (testing up to 50,000 cycles) and their electromagnetic interference shielding effectiveness verifies the applicability of these flexible transparent nanomesh electrodes to various flexible optoelectronic devices.
关键词： nanomesh,optoelectronic properties,flexible transparent conducting electrodes,Ag paste,phase-shifting edge lithography
更新于2025-09-23 15:23:52
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Highly Transparent, Flexible Conductors and Heaters Based on Metal Nanomesh Structures Manufactured Using an All Water-Based Solution Process
摘要： Metal mesh is a promising material for flexible transparent conducting electrodes due to its outstanding physical and electrical properties. The excellent control of the sheet resistance and transmittance provided by the metal mesh electrodes is a great advantage for microelectronic applications. Thus, over the past decade, many studies have been performed in order to realize high-performance metal mesh; however, the lack of cost-effective fabrication processes and the weak adhesion between the metal mesh and substrate have hindered its widespread adoption for flexible optoelectronic applications. In this study, a new approach for fabricating robust silver mesh without using hazardous organic solvents is achieved by combining colloidal deposition and silver enhancement steps. The adhesion of the metal mesh was greatly improved by introducing an intermediate adhesion layer. Various patterns relevant to optoelectronic applications were fabricated with a minimum feature size of 700 nm, resulting in high optical transmittance of 97.7% and also high conductivity (71.6 Ω sq-1) of the metal mesh. In addition, we demonstrated an effective transparent heater using the silver mesh with excellent exothermic behavior, which heated up to 245 °C with 7 V applied voltage.
关键词： solution process,flexible electrodes,transparent heaters,metal nanomesh,transparent electrodes
更新于2025-09-23 15:23:52
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Freestanding carbon nanomembranes and graphene monolayers nanopatterned via EUV interference lithography
摘要： Two-dimensional materials, such as graphene, molecular nanosheets, hexagonal boron nitride or transition metal dichalcogenides have recently attracted substantial interest due to their potential use in electronics, chemical and biological sensors, nanooptics, and catalysis. For most of these applications, the functional nanostructures have to be prepared lithographically. In this respect, extreme ultraviolet interference lithography provides both high-resolution patterning with an ultimate limit in the sub-10 nm range and high throughput capability. Here we present the preparation of nanopatterned 1 nm thick freestanding molecular nanosheets - carbon nanomembranes (CNMs) and single layer graphene employing this method and their characterization with a Helium Ion Microscope. We demonstrate periodic arrays of suspended nanostructures of CNMs and graphene including nanoribbons with width between 20 nm and 500 nm and nanomeshes with openings between 140 nm and 300 nm and mesh lines down to 90 nm.
关键词： nanomesh,graphene,carbon nanomembrane,EUV interference lithography,nanoribbon
更新于2025-09-19 17:15:36
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23.2: <i>Invited Paper:</i> All silicon passive addressed micro‐LED displays with nanoporous Si/ITO‐free nanomesh layers as light emitting pixels
摘要： In this paper, we will concentrate on the usage of novel technologies and nanostructured materials to fabricate low cost high efficient micro LED displays with unique features.
关键词： nanoporous silicon,nanomesh films,micro-LED,passive addressing
更新于2025-09-11 14:15:04
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Piezoelectric Modulation of Broadband Photoresponse of Flexible Tellurium Nanomesh Photodetectors
摘要： Flexible photodetector shows great potential applications in intelligent wearable devices, health monitoring, and biological sensing. In this work, single crystal β-tellurium nanowires were grown on flexible muscovite by molecular beam epitaxy, constructing high-density ordered nanomesh structure. The prepared photodetectors based on tellurium nanomesh exhibit excellent mechanical flexibility, fast response in a broad range from ultraviolet to near-infrared, and good photosensitivity. We found that the flexible photodetectors with Shottky contact drastically suppressed dark current, while the response speed was lowered in comparison to the devices with ohmic contact, as holes would take long time to tunnel through the Shottky barrier between metal and p-type Te. Moreover, photoresponse of flexible Shottky photodetectors can be modulated by piezoelectricity of tellurium, and pronounced photocurrent increase after many times of bend. Under external stress, polarization charges could tune Shottky barrier height of the metal/tellurium, resulting in variation of photocurrent. The research not only explores the broadband photoresponse and piezoelectric effect of tellurium nanomesh, but also promotes the integration and development of broadband flexible optoelectronic devices.
关键词： tellurium nanomesh,piezoelectric effect,broadband photoresponse,molecular beam epitaxy,flexible photodetector
更新于2025-09-11 14:15:04
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Enhanced Hybridization and Nanopatterning via Heated Liquid-Phase Infiltration into Self-Assembled Block Copolymer Thin Films
摘要： Organic-inorganic hybrids featuring tunable material properties can be readily generated by applying vapor- or liquid-phase infiltration (VPI or LPI) of inorganic materials into organic templates, with resulting properties controlled by type and quantity of infiltrated inorganics. While LPI offers more diverse choices of infiltratable elements, it tends to yield smaller infiltration amount than VPI, but the attempt to address the issue has been rarely reported. Here, we demonstrate facile temperature-enhanced LPI method to control and drastically increase the quantity and kinetics of Pt infiltration into self-assembled polystyrene-block-poly(2-vinylpyridine) (PS-b-P2VP) block copolymer (BCP) thin films. By applying LPI at mildly elevated temperatures (40 – 80 °C), we showcase controllable optical functionality of hybrid BCP films along with conductive three-dimensional (3D) inorganic nanostructures. Structural analysis reveals enhanced metal loading into BCP matrix at higher LPI temperatures, suggesting multiple metal ion infiltration per monomer of P2VP. Combining temperature-enhanced LPI with hierarchical multilayer BCP self-assembly, we generate BCP-metal hybrid optical coatings featuring tunable antireflective properties as well as scalable conductive 3D Pt nanomesh structures. Enhanced material infiltration and control by temperature-enhanced LPI not only enables tunability of organic-inorganic hybrid nanostructure and properties but also expands the application of BCPs for generating uniquely functional inorganic nanostructures.
关键词： self-assembled block copolymers,hybrid thin film,optical coating,Pt nanomesh,Liquid-phase infiltration
更新于2025-09-11 14:15:04
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27%‐Efficiency Four‐Terminal Perovskite/Silicon Tandem Solar Cells by Sandwiched Gold Nanomesh
摘要： Multijunction/tandem solar cells have naturally attracted great attention because they are not subject to the Shockley–Queisser limit. Perovskite solar cells are ideal candidates for the top cell in multijunction/tandem devices due to the high power conversion efficiency (PCE) and relatively low voltage loss. Herein, sandwiched gold nanomesh between MoO3 layers is designed as a transparent electrode. The large surface tension of MoO3 effectively improves wettability for gold, resulting in Frank–van der Merwe growth to produce an ultrathin gold nanomesh layer, which guarantees not only excellent conductivity but also great optical transparency, which is particularly important for a multijunction/tandem solar cell. The top MoO3 layer reduces the reflection at the gold layer to further increase light transmission. As a result, the semitransparent perovskite cell shows an 18.3% efficiency, the highest reported for this type of device. When the semitransparent perovskite device is mechanically stacked with a heterojunction silicon solar cell of 23.3% PCE, it yields a combined efficiency of 27.0%, higher than those of both the sub-cells. This breakthrough in elevating the efficiency of semitransparent and multijunction/tandem devices can help to break the Shockley–Queisser limit.
关键词： perovskite solar cells,multijunction/tandem,conductivity,transparency,nanomesh electrodes
更新于2025-09-11 14:15:04