- 标题
- 摘要
- 关键词
- 实验方案
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Polythiophene–PCBM-Based All-Organic Electrochromic Device: Fast and Flexible
摘要： A fast and ?exible all-organic electrochromic device, fabricated using polythiophene and PCBM as active materials and plastic substrate, which shows very good power e?ciency as well, has been reported here. The device shows quanti?able improvement in electrochromic performance using parameters like switching speed, coloration e?ciency, color contrast, and cycle life. Spectroscopic investigations have been carried out using Raman and UV?vis to establish a bias induced redox switching based mechanism for the reported improvement in the performance. The device shows switching between magenta (OFF) and transparent states (ON) with a very small bias of ±1 V, an optical modulation of 50% and an absorbance switching contrast of 91%. An enhanced stability for a duration of longer than 2500 s and 250 cycles has been reported with an ultrafast response of few hundred milliseconds. A very high coloration e?ciency of 321 cm2/C is achieved, making the proposed device one of the best reported P3HT-based electrochromic devices.
关键词： PCBM,electrochromic,polythiophene,?exible devices,organic electronics
更新于2025-09-23 15:22:29
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Autonomous Landing Control of Highly Flexible Aircraft based on Lidar Preview in the Presence of Wind Turbulence
摘要： This paper investigates preview-based autonomous landing control of a highly ?exible ?ying wing model using short range Lidar wind measurements in the presence of wind turbulence. The preview control system is developed based on a reduced-order linear aeroelastic model and employs a two-loop control scheme. The outer loop employs the LADRC (linear active disturbance rejection control) and PI algorithms to track the reference landing trajectory and vertical speed, respectively, and to generate the attitude angle command. This is then used by the inner-loop using H∞ preview control to compute the control inputs to the actuators (control ?aps and thrust). A landing trajectory navigation system is designed to generate real-time reference commands for the landing control system. A Lidar (light detection and ranging) simulator is developed to measure the wind disturbances at a distance in front of the aircraft, which are provided to the inner-loop H∞ preview controller as prior knowledge to improve control performance. Simulation results based on the full-order nonlinear ?exible aircraft dynamic model show that the preview-based landing control system is able to land the ?ying wing effectively and safely, showing better control performance than the baseline landing control system (without preview) with respect to landing effectiveness and disturbance rejection. The control system’s robustness to measurement error in the Lidar system is also demonstrated.
关键词： H∞ preview control,Highly ?exible aircraft,Lidar wind measurements,turbulence landing,autonomous landing control
更新于2025-09-23 15:22:29
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Multi-wavelength colloidal quantum dot lasers in distributed feedback cavities
摘要： Lasers with multi-wavelength colloidal quantum dots (CQDs) can be achieved using complex grating structures and ?exible substrate. The structure contains graduated periods and rectangular cavity fabricated through interference lithography, which acts as the distributed feedback cavity. A layer of densely packed CQD ?lm is deposited on the cavity via spin coating technique. The performance of CQD lasers based on di?erent distributed feedback cavities is investigated. Multi-wavelength lasing is achieved based on a ?exible rectangular cavity.
关键词： ?exible,tunable,distributed feedback,quantum dots lasers,multi-wavelength
更新于2025-09-23 15:21:01
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[ACM Press the International Conference - San Diego, California (2018.11.05-2018.11.08)] Proceedings of the International Conference on Computer-Aided Design - ICCAD '18 - Strain-aware performance evaluation and correction for OTFT-based flexible displays
摘要： Organic thin-?lm transistors (OTFTs) are widely used in ?exible circuits, such as ?exible displays, sensor arrays, and radio frequency identi?cation cards (RFIDs), because these technologies offer features such as better ?exibility, lower cost, and easy manufacturability using low-temperature fabrication process. This paper develops a procedure that evaluates the performance of ?exible displays. Due to their very nature, ?exible displays experience signi?cant mechanical strain/stress in the ?eld due to the deformation caused during daily use. These deformations can impact device and circuit performance, potentially causing a loss in functionality. This paper ?rst models the effects of extrinsic strain due to two fundamental deformations modes, bending and twisting. Next, this strain is translated to variations in device mobility, after which analytical models for error analysis in the ?exible display are derived based on the rendered image values in each pixel of the display. Finally, two error correction approaches for ?exible displays are proposed, based on voltage compensation and ?exible clocking.
关键词： Organic thin-?lm transistors (OTFTs),performance evaluation,error correction,strain modeling,?exible displays
更新于2025-09-23 15:21:01
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Comparison of spin-on-glass and WO <sub/>3</sub> as an insulating layer for printed resistive memory devices
摘要： Resistive Random Access Memory (ReRAM) is a highly promising technology for various future memory applications. In this work, spin-on-glass (SOG) and WO3 nanoparticles are used as an insulating layer for completely inkjet-printed ReRAM cells. The direct comparison shows that the di?erence in switching parameters can be used to serve di?erent device requirements for various applications. While local ?lament formation with conductive atomic force microscopy con?rms the same switching mechanism for both compounds, the current–voltage characteristics di?er from each other. SOG as excellent insulator shows an OFF resistance in the range of GΩ and is therefore highly suitable for multi-bit data storage to increase memory density. ReRAM cells with WO3 face larger leakage currents and show a low degree of multi-bit data storage. However, WO3 can be used to fabricate completely sinter-free memory devices for applications which do not allow high temperatures in the fabrication process.
关键词： spin-on-glass,?exible electronics,printed electronics,organic electronics,inkjet printing,ReRAM
更新于2025-09-19 17:15:36
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[IEEE 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Munich, Germany (2019.6.23-2019.6.27)] 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Spatiotemporal Mode-Locking in Multimode Fiber Lasers
摘要： Over the last few decades, there has been considerable concern over the multifactory manufacturing environments owing to globalization. Numerous studies have indicated that ?exible job-shop scheduling problems (FJSPs) and the distributed and FJSPs (DFJSPs) belong to NP-hard puzzle. The allocation of jobs to appropriate factories or ?exible manufacturing units is an essential task in multifactory optimization scheduling, which involves the consideration of equipment performance, technology, capacity, and utilization level for each factory or manufacturing unit. Several variables and constraints should be considered in the encoding problem of DFJSPs when using genetic algorithms (GAs). In particular, it has been reported in the literature that the traditional GA encoding method may generate infeasible solutions or illegal solutions; thus, a specially designed evolution process is required. However, in such a process, the diversity of chromosomes is lost. To overcome this drawback, this paper proposes a re?ned encoding operator that integrates probability concepts into a real-parameter encoding method. In addition, the length of chromosomes can be substantially reduced using the proposed algorithm, thereby, saving computation space. The proposed re?ned GA algorithm was evaluated with satisfactory results through two-stage validation; in the ?rst stage, a classical DFJSP was adopted to show the effectiveness of the algorithm, and in the second stage, the algorithm was used to solve a real-world case. The real-world case involved the use of historical data with 100 and 200 sets of work orders of a fastener manufacturer in Taiwan. The results were satisfactory and indicated that the proposed re?ned GA algorithm could effectively overcome the con?icts caused by GA encoding algorithms.
关键词： distributed and ?exible job-shop,scheduling problems,probability-based encoding operator,?exible job-shop,Genetic algorithms
更新于2025-09-19 17:13:59
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Online Gauss-Newton-based parallel-pipeline method for real-time in-situ laser ranging
摘要： Over the last few decades, there has been considerable concern over the multifactory manufacturing environments owing to globalization. Numerous studies have indicated that ?exible job-shop scheduling problems (FJSPs) and the distributed and FJSPs (DFJSPs) belong to NP-hard puzzle. The allocation of jobs to appropriate factories or ?exible manufacturing units is an essential task in multifactory optimization scheduling, which involves the consideration of equipment performance, technology, capacity, and utilization level for each factory or manufacturing unit. Several variables and constraints should be considered in the encoding problem of DFJSPs when using genetic algorithms (GAs). In particular, it has been reported in the literature that the traditional GA encoding method may generate infeasible solutions or illegal solutions; thus, a specially designed evolution process is required. However, in such a process, the diversity of chromosomes is lost. To overcome this drawback, this paper proposes a re?ned encoding operator that integrates probability concepts into a real-parameter encoding method. In addition, the length of chromosomes can be substantially reduced using the proposed algorithm, thereby, saving computation space. The proposed re?ned GA algorithm was evaluated with satisfactory results through two-stage validation; in the ?rst stage, a classical DFJSP was adopted to show the effectiveness of the algorithm, and in the second stage, the algorithm was used to solve a real-world case. The real-world case involved the use of historical data with 100 and 200 sets of work orders of a fastener manufacturer in Taiwan. The results were satisfactory and indicated that the proposed re?ned GA algorithm could effectively overcome the con?icts caused by GA encoding algorithms.
关键词： scheduling problems,Genetic algorithms,distributed and ?exible job-shop,probability-based encoding operator,?exible job-shop
更新于2025-09-19 17:13:59
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[IEEE 2019 IEEE 16th International Conference on Group IV Photonics (GFP) - Singapore, Singapore (2019.8.28-2019.8.30)] 2019 IEEE 16th International Conference on Group IV Photonics (GFP) - Light Emission Driven by Fano Resonances in Symmetry-Breaking Silicon Metasurface
摘要： Over the last few decades, there has been considerable concern over the multifactory manufacturing environments owing to globalization. Numerous studies have indicated that ?exible job-shop scheduling problems (FJSPs) and the distributed and FJSPs (DFJSPs) belong to NP-hard puzzle. The allocation of jobs to appropriate factories or ?exible manufacturing units is an essential task in multifactory optimization scheduling, which involves the consideration of equipment performance, technology, capacity, and utilization level for each factory or manufacturing unit. Several variables and constraints should be considered in the encoding problem of DFJSPs when using genetic algorithms (GAs). In particular, it has been reported in the literature that the traditional GA encoding method may generate infeasible solutions or illegal solutions; thus, a specially designed evolution process is required. However, in such a process, the diversity of chromosomes is lost. To overcome this drawback, this paper proposes a re?ned encoding operator that integrates probability concepts into a real-parameter encoding method. In addition, the length of chromosomes can be substantially reduced using the proposed algorithm, thereby, saving computation space. The proposed re?ned GA algorithm was evaluated with satisfactory results through two-stage validation; in the ?rst stage, a classical DFJSP was adopted to show the effectiveness of the algorithm, and in the second stage, the algorithm was used to solve a real-world case. The real-world case involved the use of historical data with 100 and 200 sets of work orders of a fastener manufacturer in Taiwan. The results were satisfactory and indicated that the proposed re?ned GA algorithm could effectively overcome the con?icts caused by GA encoding algorithms.
关键词： Genetic algorithms,probability-based encoding operator,?exible job-shop,distributed and ?exible job-shop,scheduling problems
更新于2025-09-19 17:13:59
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[IEEE 2019 Device Research Conference (DRC) - Ann Arbor, MI, USA (2019.6.23-2019.6.26)] 2019 Device Research Conference (DRC) - Defect characterization of InAs/InGaAs quantum dot photodetector grown on GaAs-on-V-grooved-Si substrate
摘要： We present the experimental implementation of an all-optical ROADM scheme for routing of an individual subchannel within an all-optical OFDM superchannel. The different functions required of optical node were demonstrated using interferometric technique with the extraction, drop, and addition of individual subchannel in a ten subchannels optically aggregated signal. The scheme we reported enables a fully ?exible node compatible with future terabit per second superchannel transmission.
关键词： optical communication,All-optical node,all-optical OFDM,interferometer,?exible optical networks,subcarrier multiplexing
更新于2025-09-19 17:13:59
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High Figure-of-Merit Transparent Copper–Zinc Oxide Window Electrodes for Organic Photovoltaics
摘要： We report a copper–zinc oxide bilayer electrode supported on ?exible polyethylene terephthalate (PET) with a sheet resistance of 11. 3 (cid:127) sq?1 and average transparency of 84.6% in the wavelength range of 400–800 nm. The copper ?lm is perforated with a dense array of sub-micron diameter apertures fabricated using polymer-blend lithography, which imparts broad band anti-re?ectivity. We demonstrate proof-of-principle that it is possible to fabricate the polymer mask by dip coating which is a scalable deposition method compatible with roll-to-roll processing. During storage of the electrode at ambient temperature the ZnO layer is spontaneously doped with copper from the underlying copper ?lm and so the thin ZnO layer serves both as an anti-re?ecting layer and an excellent electron transport layer. When compared with commercially available indium tin oxide coated (ITO) plastic substrates this electrode exhibits superior stability towards bending deformation, with no change in sheet resistance after bending through a 4 mm radius of curvature 100 times. Model inverted organic photovoltaic (OPV) devices using this electrode exhibit a champion power conversion ef?ciency of ～8.7%, which is the highest reported ef?ciency to date for an OPV device using a copper based transparent electrode, outperforming identical devices using ITO coated plastic as the transparent electrode.
关键词： inverted photovoltaic devices,polymer-blend lithography,?exible,transparent electrode,copper
更新于2025-09-19 17:13:59