Nano Research
·
2024
·
IF 9.5
Yan Danni,Dong Yuhui,Wei Naiwei,Yang Shuai,Zhu Hong,Gu Wanzhong,Zou Yousheng,Zeng Haibo
Quaternary Ag-In-Ga-S (AIGS) quantum dot (QD) is considered a promising, spectral-tunable, and environmentally friendly luminescent display material. However, the more complex surface defect states of AIGS QDs resulting from the coexistence of multiple elements lead to a low (< 60%) photoluminescence quantum yield (PLQY). Here, we develop a novel convenient method to introduce Z-type ligands ZnX 2 (X = Cl, Br, I) for passivating the surface defects of AIGS QDs to dramatically enhance the PLQY and stability without affecting the crystalline structure and morphology. Results show that the addition of ZnCl 2 during the purified process of AIGS QDs leads to a 3-fold increase of PLQY (from 28.5% to 87%). Impressively, the highest PLQY is up to a recorded value of 92%, which is comparable to typical heavy metal QDs. Exciton dynamics studies have shown that the rapid annihilation process of excitons in treated QDs is inhibited. We also confirm that the improvement in PLQY is a result of the effective passivation of the non-coordinating atom on the QD surface by building a new bonding between sulfur dangling and Zn 2+ . The realization of high PLQY will further promote the application of AIGS QDs in luminescent displays.
研究领域:
材料科学
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纳米技术
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光电技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 44
·2307609
·
IF 19
Siyu Zhang,Yan Zhu,Yifan Xia,Kangting Liu,Shuhan Li,Biao Yang,Mingyuan Li,Xinrong Zhi,Xin Wang
Anti-counterfeiting and visual optical information encryption/decryption technology have attracted widespread attention in the field of information security. Luminescent encryption technologies still face a huge challenge in external high voltage power supply, complex architecture, and expensive decryption equipment, which hinder their broad applications. Herein, a wearable integrated self-powered electroluminescent (EL) display device (W-ELD) that consists of MXene/Silicone-based triboelectric nanogenerator (MS-TENG) and EL device based on a shared MXene electrode is developed for patterned display and information encryption. The W-ELD features an all-in-one MXene electrode with excellent flexibility and high conductivity of 0.6 kΩ sq −1 , which is shared by both MS-TENG and EL devices. The MS-TENG demonstrates excellent output performances (output power of 0.9 Wm −2 ) and high stability and durability (10 4 cycles), which can directly light up the flexible patterned EL device. More importantly, when dripping conductive electrolyte solution, the W-ELD based on “中國”-patterned MXene electrode can precisely reveal the encryption information through self-powered EL emission for real-time visualized information interaction. Consequently, the all-in-one MXene electrode-based W-ELD that integrates both MS-TENG and EL device demonstrates exceptional patterned EL-based information encryption features, which offers a potential prospect in wearable self-powered optoelectronic devices, flexible displays, and encryption technology.
研究领域:
材料科学
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电子工程
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信息安全
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ChemNanoMat
·
2024
·
IF 2.6
Haibo Zeng,Shuai Yang,Danni Yan,Hong Zhu,Naiwei Wei,Yuhui Dong,Yousheng Zou
In recent years, Ag-In-Ga-S (AIGS) quaternary quantum dots (QDs) have garnered significant attention as a novel class of environmentally friendly and non-toxic QDs. However, the hydrothermal synthesis method for aqueous QDs has been plagued by issues such as inconsistent size, subpar crystallinity, and low photoluminescence quantum yield (PLQY). Herein, we developed a dual ligand strategy based on the hard and soft acids and bases (HSAB) theory to synthesize aqueous AIGS QDs with an impressive PLQY of up to 64.3%, currently the highest value among hydrothermal-synthesized uncoated I-III-VI QDs. The QDs exhibit better crystallinity, narrow size distribution (3.07 ± 0.31 nm), and remarkable stability. The mechanism underlying this dual ligand strategy was further elucidated, shedding light on the distinct influences of different ligands on the growth of QDs. The high PLQY contributes to the further application of aqueous AIGS QDs in luminescent displays and the field of biology. Meanwhile, this ligand strategy has broad reference significance for efficient preparation of other water-soluble QDs.
研究领域:
材料科学
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纳米技术
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化学
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光电技术
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生物技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2017
·Vol. 29
·期 41
·1703552
·
IF 19.791
Xiuru Xu,Dan Hu,Lijia Yan,Shaoli Fang,Clifton Shen,Yueh-Lin Loo,Yuan Lin,Carter S. Haines,Na Li,Anvar A. Zakhidov,Hong Meng,Ray H. Baughman,Wei Huang
A novel geometry for electroluminescent devices, which does not require transparent electrodes for electrical input, is demonstrated, theoretically analyzed, and experimentally characterized. Instead of emitting light through a conventional electrode, light emission occurs through a polar liquid or solid and input electrical electrodes are coplanar, rather than stacked in a sandwich configuration. This new device concept is scalable and easily deployed for a range of modular alternating-current-powered electroluminescent light sources and light-emitting sensing devices. The polar-electrode-bridged electroluminescent displays can be used as remotely readable, spatially responsive sensors that emit light in response to the accumulation and distribution of materials on the device surface. Using this device structure, various types of alternating current devices are demonstrated. These include an umbrella that automatically lights up when it rains, a display that emits light from regions touched by human fingers (or painted upon using a mixture of oil and water), and a sensor that lights up differently in different areas to indicate the presence of water and its freezing. This study extends the dual-stack, coplanar-electrode device geometry to provide displays that emit light from a figure drawn on an electroluminescent panel using a graphite pencil.
研究领域:
光电子学
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传感器与传感系统
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显示技术
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材料科学
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电气工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yi Yu,Zelin Li,Wei Zhou,Wei Lu,Shuxin Wei,Tao Chen
Rewritable luminescent materials are attracting widespread attention for information storage and display as they can help to reduce environmental wastes caused by the abuse of single-use and transient systems. Nevertheless, since most reported systems are chemical-stimuli-responsive and single-stimuli-responsive, it remains challenging to achieve the rewritable and programmable display of multiple information in one single system, which is essential to enhance information richness and display intelligence. In this work, an ideal kind of multi-responsive soft luminescent display systems are reported, which consist of heat/humidity-responsive fluorescence-phosphorescence dual-emission film and stacked graphene assembly (SGA) film by using thin poly (dimethyl siloxane) (PDMS) as middle connecting layer. In such multilayer structure, the heat generated by electricity connection or light illumination of bottom SGA film can be instantly transferred across the middle PDMS layer to cause heat-triggered red-to-blue emission color change, or to evaporate water for blue-to-red emission color recovery. Owing to the “residual-free” nature of these electricity, light and water stimuli, multi-responsive rewritability is guaranteed to enable the reversible writing and complete erasure of various letter/pattern information. On this basis, robust electricity/light-heat-hygro multi-responsive soft luminescent display systems are demonstrated, in which diverse letter/pattern information could be facilely programmed to be successively displayed and then completely reset to enable another data writing/erasing cycle by sequential modulation of different environmental stimuli. This study brings programmable merit for rewritable luminescent display systems and is expected to inspire more intelligent ones.
研究领域:
材料科学
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光电技术
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信息显示技术
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yuzhi Zhou,Xiao Tang,Lin Xu,Chuan Jing,Yanhong Li,Faling Ling,Hongmei Yang,Shengnan Duan,Xianju Zhou
Electrochromic (EC) technologies offer great prospects of applications in smart windows and nonemissive displays due to their low energy consumption and electrically controlled optical modulation. However, electrolytes, as the essential component of traditional electrochemical EC devices, cause challenges such as limited device design strategies and problems in safety, stability, and integration, hindering the full commercialization of EC devices. Herein, an innovative strategy for designing electrochromic devices is proposed using organic/inorganic semiconductor heterojunctions. The heterojunction is constructed by the C-rich carbon nitride-conjugated polymer (CPCN) with the π* electron accumulation effect and TiO2 nanocrystals with high dielectricity with an architecture of TiO2/CPCN/TiO2 to build interfacial energy barriers or electron transfer routes. These interfacial effects facilitate electron injection, transport, and accumulation, causing changes in the electronic structure of materials and thus their light absorption properties, thereby achieving bistable electrochromism. Using the heterojunction, a nonelectrochemical EC device with the symmetric architecture of FTO/TiO2/CPCN/TiO2/FTO is fabricated, free of electrolytes, enabling an intrinsic all-solid state. The design concept and underlying mechanism are illustrated and substantiated through electrochemical impedance spectroscopy and Mott–Schottky experiments. The electrochromic performances are evaluated through the optical contrast (ΔT), coloration efficiency, response time, and cyclic and long-term stability. The electrochromic display performance based on the laser-etching strategy is particularly investigated.
研究领域:
材料科学
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纳米技术
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光电子学
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固体物理
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 36
·期 13
·2310020
·
IF 29.4
Hui Tan,Lijie Sun,Hongfei Huang,Luzhi Zhang,Rasoul Esmaeely Neisiany,Xiaopeng Ma,Zhengwei You
Stretchable conductive fibers play key roles in electronic textiles, which have substantial improvements in terms of flexibility, breathability, and comfort. Compared to most existing electron-conductive fibers, ion-conductive fibers are usually soft, stretchable, and transparent, leading to increasing attention. However, the integration of desirable functions including high transparency, stretchability, conductivity, solvent resistance, self-healing ability, processability, and recyclability remains a challenge to be addressed. Herein, a new molecular strategy based on dynamic covalent cross-linking networks is developed to enable continuous melt spinning of the ionogel fiber with the aforementioned properties. As a proof of concept, adaptable covalently cross-linked ionogel fibers based on dimethylglyoximeurethane (DOU) groups (DOU-IG fiber) are prepared. The resultant DOU-IG fiber exhibited high transparency (>93%), tensile strength (0.76 MPa), stretchability (784%), and solvent resistance. Owing to the dynamic of DOU groups, the DOU-IG fiber shows high healing performance using near-infrared light. Taking advantage of DOU-IG fibers, multifunctional ionotronics with the integration of several desirable functionalities including sensor, triboelectric nanogenerator, and electroluminescent display are fabricated and used for motion monitoring, energy harvesting, and human–machine interaction. It is believed that these DOU-IG fibers are promising for fabricating the next generation of electronic textiles and other wearable electronics.
研究领域:
材料科学
·
纳米技术
·
可穿戴电子
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纺织工程
·
高分子化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）