Advanced Materials Technologies
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2022
·Vol. 7
·期 12
·2200371
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IF 8.856
MingYang Yang,Guangyou Liu,Zheng Zeng,Shuhao Zhang,Jie Liu,Zong Qin,Zhihe Chen,Bo-Ru Yang
Human–machine interaction will be revolutionarily different in the future Internet of Things (IoT) environments. Many displays will be adopted onto electronic devices to enhance human–device communication, even under a very bright sunlight ambience. Thus, power consumption and sunlight visibility are important attributes for this application. Electrophoretic displays (EPDs) have the inherent advantages of ultra-low power consumption and high sunlight visibility, which are perfectly suitable for IoT applications. The low power consumption resulted from the balance of viscosity, gravity, and other complicated forces involved in the electrophoretic dispersion. This force balance is generally termed “bistability,” meaning the particle-packing can be stable without external power at black and white image states. However, good bistability implies a slow image updating rate, significantly degrades users’ experience. In this work, a 3D network structure that undergoes disruption and reorganization with the particles’ movement is utilized in the electrophoretic ink dispersion. Dynamic viscosity modulation enables the bistable and fast-response dual-working modes. The newly developed design can increase the response speed of EPDs by a factor of 2.38, simultaneously maintaining the bistability. The electronic ink with this reversible network provides a promising solution for the future video-rate e-paper displays.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
Advanced Intelligent Systems
·
2019
·Vol. 1
·期 4
·1900052
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IF 0
Zhengdong Liu,Yuhang Yin,Xiangjing Wang,Shang Ju,Mengya Song,Zhe Zhou,Xiaojing Wang,Shuai Cheng,Zepu Zhang,Juqing Liu,Wei Huang
Rectifying memory is an effective strategy to solve the cross-talk issues of crossbar switch architecture during the integration procedure for high-density data storage. Herein, a two-dimensional (2D) conjugated microporous polymer (CMP) is proposed as an ideal resistive switching medium for integrated rectifying memory devices. Large-area 2D CMP film is prepared using a surface-confined polymerization method, featuring rewritable nonvolatile memory with a low set voltage in a graphene/CMP/metal diode. Importantly, this film exhibits outstanding structural stability during solvent immersion and other polymer coating, being suitable for solution-processed multilayer polymer electronics. By directly stacking the CMP memristor with a poly(3-hexylthiophene) rectifier, the integrated multilayer device shows desirable rectifying memory effect, effectively reducing the misreading issue induced by the cross-talk in a crossbar array.
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DOI
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2024
·
IF 6.3
Le Huy Thai,Le Thi Thanh Nhi,Truong Chau Giang,Le Van Quyet,Nguyen Minh Hiep,Tran Quang Hung,Le Hoang Sinh
A highly bistable viologen-based electrochromic display was successfully developed by using a simple strategy with cheap commercial phenol-based epoxy. By adding epoxy, phenol species can contribute a dual effect, in which they can play as electron shuttles to facilitate fast coloration of ECDs and stabilize the long bistability of ECDs through the proton-coupled electron transfer (PCET) mechanism during coloration state. With the use of epoxy, CPHEV 2+ /E exhibits an improvement of maximum ΔT, which is 78.6 % at 596 nm compared to 53 % for that of ECD without epoxy. The ECD with added epoxy can hold the colored state up to 50 h after applying a voltage of −2.5 V for 15 s compared with ECD without epoxy which is 22 min. Notably, the color state undergoes decomposition to 10 % of its initial value after 3.5 h without any extra power supply. The 3D-printed rose flower ECD was successfully demonstrated using digital light processing (DLP) with good dimensional accuracy and resolution.
研究领域:
材料科学
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电化学
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光电技术
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显示技术
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DOI
高影响因子
Materials Chemistry Frontiers
·
2019
·Vol. 3
·期 11
·2514-2520
·
IF 0
Jinming Zeng,Zhijun Wan,Mimi Zhu,Lianghui Ai,Ping Liu,Wenji Deng
A transparent solid-state electrolyte (T-SE) consisting of polymethacrylate (PMMA), polyoxypropylene glycol (PPG), and lithium perchlorate (LiClO4) was prepared. Subsequently, using perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) and 5,5′′′-di(methylbenzoate)-2,2′:5′,2′′:5′′,2′′′-quater(3,4-ethylenedioxythiophene) (4EDOT-2B-COOCH3) as the electrochromic active materials, electrochromic devices (ECDs) (including rigid and flexible ECDs) based on T-SE were fabricated. ECDs possessed a sandwich structure consisting of an indium tin oxide (ITO) glass (or ITO polyethylene terephthalate (PET))/PTCDA (or 4EDOT-2B-COOCH3) film/T-SE/ITO glass (or ITO PET). The ECDs exhibited a fast switching speed and high optical contrast. The doping/dedoping switching times of flexible ECDs (ITO PET/PTCDA film/T-SE/ITO PET and ITO PET/4EDOT-2B-COOCH3 film/T-SE/ITO PET) were 2.4 s/5.6 s and 5.2 s/2.6 s, respectively; their optical contrast values were 61.0% and 48.6% at 700 nm, respectively. Notably, the flexible ECDs (ITO PET/PTCDA film/T-SE/ITO PET and ITO PET/4EDOT-2B-COOCH3 film/T-SE/ITO PET) also showed suitable bistability (open-circuit memory); they could retain 81.5% and 74.7% of their original optical contrast at 700 nm after removing the drive voltage for 12 hours, respectively. Furthermore, the flexible ECDs also exhibited similar electrochromic properties under bending conditions.
研究领域:
材料科学
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能源技术
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光学工程
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DOI
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