Scientific Reports
·
2016
·Vol. 6
·期 1
·1-9
·
IF 5.228
Ji Lvlv,Dai Yuyu,Yan Shuanma,Lv Xiaojing,Su Chang,Xu Lihuan,Lv Yaokang,Ouyang Mi,Chen Zuofeng,Zhang Cheng
A novel strategy to obtain rapid electrochromic switching response by introducing 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) moiety into polytriphenylamine backbone has been developed. The electrochromic properties of the integrated polymer film are investigated and a possible mechanism is proposed with TEMPO as a counterion-reservoir group to rapidly balance the charges during electrochromic switching, which leads to significantly improved electrochromism performance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Jianing Li,Xuegang Lu,Yin Zhang,Fei Cheng,Yanlin Li,Xiaoxiang Wen,Sen Yang
Smart optical materials are drawing more and more attention because of their wide application in energy conservation, wearable sensors, optical tuning, and medical devices. However, current smart optical materials, including electroresponsive, thermoresponsive, and mechanoresponsive materials, are greatly restricted in practical applications because of their long response time, complicated preparation, and high cost. This study develops a novel, magnetically tunable, smart optical material with swift and high-contrast optical switching based on one-dimensional (1D) Fe3O4@SiO2 nanochains (NCs), which have the large shape anisotropy of the 1D structure and the superparamagnetic properties of Fe3O4 particles. The material exhibited a clear transparent state when NCs were arranged parallel to the viewing direction under an applied magnetic field, whereas it showed good shielding effect when the NCs were randomly oriented upon removal of the field. The light transmittance could be dynamically adjusted over the wide range of 20–80% through a small applied magnetic field of 50–100 Oe, which is superior to most of the currently reported systems. This swift, sensitive, and reversible response is attributed to the good responsivity of magnetic NCs. Also, an effective model was proposed to explain the transmittance modulation scheme and forecast its optical potential. The large tunable range and the low triggered field make Fe3O4@SiO2 NCs an advantageous candidate for application in smart windows, optical switchers, and other fields.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2019
·
IF 6.019
Zhiqiang Xie,Qingqing Liu,Qianqian Zhang,Bingxin Lu,Jin Zhai,Xungang Diao
Mesoporous tungsten trioxide (WO 3 ) and nickel oxide (NiO) electrochromic (EC) thin films have been fabricated by sol-gel method with assistant of tri-block copolymer [PEO 132 PEO 50 PEO 132 ] (F108). By controlling weight ratio of F108 and calcination temperatures, uniform and transparent mesoporous films are fabricated. Both WO 3 and NiO films are comprised by nanoparticles with diameters of ca .10 nm, mesopores with pore size of approximately 6 nm are distributed in the films. The thickness of the films are ca . 400 nm. The as-prepared films have ultra-fast switching time during EC redox reactions . Applied with positive and negative voltages of 40 s respectively, the coloration/bleaching time of WO 3 and NiO films are 5.7 s/2.3 s and 0.9 s/3.8 s, which is faster than that of comparative EC films fabricated by sol-gel method without F108 (coloration/bleaching time of WO 3 and NiO films are 17.5 s/14.5 s and 13.6 s/4.9 s) and EC films fabricated by magnetron sputtering method (coloration/bleaching time of WO 3 and NiO films are 29.4 s/21.3 s and 9.6 s/7.5 s). Quasi-solid state electrochromic device assembled with mesoporous WO 3 and NiO thin films has excellent EC performance, such as fast switching speed (3.2/1.1 s for coloration/bleaching time), large optical modulation of about 45% (at 600 nm), high coloration efficiency (130.8 cm 2 /C at the wavelength of 600 nm) and good cycle stability. These excellent properties are derived from mesoporous channels in the films. For the mesoporous channels can shorten the diffusion paths and make it easier for ions to transport in films.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
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
·
能源技术
·
光学工程
✓ 已验证
DOI
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Kang Ma,Qian Tang,Chun-rong Zhu,Jun-fei Long,Cheng-bin Gong,Xiang-kai Fu
This work reports novel dual-colored and fast switching electrochromic materials based on pyridinium salts , 1,1′,1″,1‴-tetrakis(4,4′,4″,4‴-tetrapyridyl)cyclobutane derivatives (TPCBDs). TPCBDs show outstanding electrochromic properties including fast electrochromic switching, dual color, reasonable contrast, low driving voltage, and good stability. TPCBDs are promising candidates for visible electrochromic displays because of their remarkable electrochromic behaviors.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xiaojing Lv,Jin Li,Libin Xu,Xuchen Zhu,Alexey Tameev,Alexander Nekrasov,Grigory Kim,Haofei Xu,Cheng Zhang
Transparent-to-colored electrochromic devices exhibit promising application prospects and have gained popularity. Herein, two triphenylamine derivatives TPA-OCH3 and TPA-CN with styryl moieties and different donor or acceptor units were designed and synthesized to further prepare solvent-resistant thermally cross-linking polymer P(TPA-OCH3) and P(TPA-CN) without any additional initiator. P(TPA-OCH3) and P(TPA-CN) possess two pairs of redox peaks, and P(TPA-OCH3) shows a lower onset oxidation potential compared to P(TPA-CN) because of the pendent donor unit. Correspondingly, both polymers exhibit multicolored changes from the neutral colorless state to noticeable oxidized colors under different potentials. Furthermore, the thermally cross-linking copolymer P(TPA-OCH3-co-TPA-CN) was obtained by TPA-OCH3 and TPA-CN (the molar ratio is 2:1) and presents outstanding electrochromism with four color changes (colorless–orange–blue–purple) due to the multistep redox process of TPA-OCH3 and TPA-CN units. It is more intriguing that the electrochromic device based on the copolymer films possesses a high optical contrast of 57.8% at 680 nm, fast switching time (0.52 and 0.66 s), and robust cyclic stability over 30 000 cycles with very little decay. Therefore, the thermally cross-linking copolymer is a promising candidate material for high-performance transmittive electrochromic devices, such as smart windows, sunglasses, and E-papers.
研究领域:
材料科学
·
化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2011
·Vol. 21
·期 14
·5492-5498
·
IF 5.101
Jun Zhang,Jiang-ping Tu,Xin-hui Xia,Xiu-li Wang,Chang-dong Gu
A hexagonal WO3 nanowire array film is obtained using a template-free hydrothermal method by adding ammonium sulfate as a capping agent. The WO3 nanowires grown vertically on a FTO-coated glass substrate are woven together at the surface of the film, forming well-aligned arrays at the bottom part and a porous surface morphology. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) reveal that each nanowire is a hexagonal single crystal and their long axes are oriented toward the [0001] direction. Due to the highly porous surface, good contact with the conductive substrate and large tunnels of the hexagonal-structured WO3, a fast switching speed of 7.6 and 4.2 s for coloration and bleaching, respectively, and a high coloration efficiency of 102.8 cm2C−1 are achieved for the WO3 nanowire array film.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 33
·18690-18697
·
IF 2.936
Qian Liu,Zijie Xu,Wu Qiu,Chen Hou,Yanan Wang,Peijian Yao,Rui Yu,Wenxi Guo,Xiang Yang Liu
Ultraflexible electronics have received extensive attention due to their favorable properties, such as superior mechanical robustness, light weight and good compatibility with large-area roll-to-roll fabrication. Here we present a flexible sandwiched tungsten trioxide/silver nanotrough network/poly(3,4-ethylenedioxythiophene)–poly(styrene sulfonate) multi-layer transparent conducting electrode with prominent conductivity (sheet resistance as low as 1.08 Ω sq−1) and transparency (85%). In particular, the flexible transparent electrode exhibits excellent mechanical robustness upon bending and stretching. This hybrid electrode can be further adhered tightly to a layer of WO3 to form an electrochromic device, which simultaneously displays a rapid switching time (0.75 s/1.82 s for bleaching/coloring) and high cyclic performance (86% retention of the initial optical contrast after cycling for 30 000 s). In addition, our electrode can also be fabricated on various flexible substrates, such as polyethylene cling wrap, polydimethylsiloxane and Ecoflex, with sustained electrochromic properties after bending, twisting, stretching and even strong kneading. Our work provides new opportunities for the next generation of flexible and wearable electronics applied on various flexible substrates.
研究领域:
材料科学
·
纳米科技
·
柔性电子学
·
功能材料
·
电化学
·
高分子材料
·
器件物理
✓ 已验证
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Chen Dinghui,Tong Zizheng,Rao Qiushi,Liu Xingchen,Meng Hong,Huang Wei
Black-to-transparent electrochromism is hailed as the holy grail of organic optoelectronics. Despite its potential, designing black electrochromic materials that fully absorb visible light remains a significant challenge. Electroactive materials that simultaneously possess excellent cyclic stability, fast switching times, and high coloration efficiency are rare. In this study, we successfully designed copolymers that fully absorb the entire visible spectrum by judiciously selecting four types of monomers. We incorporated two types of polar side chains to synergistically enhance the ionic conductivity of the copolymers, thus improving the performance of electrochromic devices. Among these electrochromic devices, the P2-a device exhibits cycling stability exceeding 10 5 cycles, and the P2-c device demonstrates a coloring/ bleaching time of 0.82 s/0.86 s and achieves a coloration efficiency of 1078 cm²/C. This study proposes a strategy for designing and synthesizing high-performance black electrochromic copolymers.
研究领域:
材料科学
·
有机光电子学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Applied Materials Today
·
2024
·
IF 7.2
Le Huy Thai,Le Thi Thanh Nhi,Truong Chau Giang,Nguyen Minh Hiep,Truong Quang Trung,Tran Quang Hung,Le Hoang Sinh
A new 3D printed multicolor Prussian blue-viologen inorganic-organic hybrid electrochromic device was successfully developed using digital light processing. Photocurable 1-(2 cyanophenyl)-1′-(2-hydroxyethyl)-[4,4′-bipyridine]-1,1′-diium (CPHEV)-based ionogel was printed on ITO glass as an electrochromic layer. The thin film of Prussian blue (PB) was electrodeposited on another ITO glass as an ion storage layer. With PB thin film, the ECDs exhibited a bleaching time 330 times faster than that of ECDs without PB. The ECD showed excellent electrochromic performance with a high color contrast ratio of 93.4 % at -2.5 V with a pulse width of 5 s. Moreover, the ECDs also exhibited multi-coloration in L*a*b* color space with the highest different color points (ΔE* ab ) value of 75.2 between the bleaching state and coloring state. A high coloration efficiency of the ECD was obtained at 296 cm 2 C -1 corresponding to 60 % of a full optical switch at -2.5 V. The 3D printed ECD was successfully demonstrated using digital light processing (DLP) with high dimensional accuracy and resolution.
研究领域:
材料科学
·
电化学
·
纳米技术
·
光电技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Qimeng Sun,Songjie Li,Xiaomei Yu,Yanmin Zhang,Tiantian Liu,Jin You Zheng
Tungsten trioxide (WO 3 ) film, recognized as one of the most promising electrochromic materials due to its exceptional electrochemical characteristics, is extensively utilized in fabricating electrochromic devices. The use of bismuth-doped WO 3 (Bi-WO 3 ) films in photoelectrocatalysis has been extensively studied. However, its potential in electrochromism remains unexplored. Herein, amorphous Bi-WO 3 films with enhanced electrochromic performance are synthesized through a simple sol–gel method. The effects of Bi doping amount and sol concentration on the electrochromic properties of Bi-WO 3 films are investigated. The optimized Bi-WO 3 film displays excellent electrochromic performance, encompassing high optical contrast (ΔT = 81% at 630 nm), fast switching time (2.4/1.2 s for coloring and bleaching), and high coloration efficiency (55.84 cm 2 C −1 ). An electrochromic device is assembled utilizing an amorphous Bi-WO 3 film as the electrochromic layer with Cu foil as the counter electrode. The fascinating electrochromic properties of amorphous Bi-WO 3 thin films and the high activity features of proton enable the assembled ECD to have a suitable working voltage range (1.1 V) in aqueous electrolytes. Besides, the electrochromic device demonstrates outstanding properties (ΔT = 70%, t c = 3 s, t b = 0.9 s) and provides a helpful strategy for the facile processing of high-performance electrochromic devices.
研究领域:
材料科学
·
电化学
·
光电学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 11
·期 1
·2202115
·
IF 10.05
Shengliang Zhang,Yutao Peng,Jing Zhao,Zengjie Fan,Bing Ding,Jim Yang Lee,Xiaogang Zhang,Yimin Xuan
Dual-band electrochromic smart windows with dynamic and independent control of near-infrared (NIR) and visible (VIS) light transmittance can notably reduce the carbon footprint of buildings and improve the occupants’ visual and thermal comfort. The dual-band response is often generated by the phase transition of crystalline electrochromic materials. However, the phase-transition of crystalline materials is kinetically sluggish, resulting in a long response time. Herein, a fast-switching dual-band electrochromic smart window based on a single-component amorphous and porous tungsten oxide (AP-WO 3 ) cathode without the slow phase-transition process is demonstrated. The amorphous and porous structure of WO 3 not only significantly improves the ion transport, but also provides a large surface area for Li + adsorption that gives rise to a tunable surface plasmon resonance (SPR) in the NIR range. Consequently, the single-component AP-WO 3 film can modulate the NIR and VIS light transmittance independently and effectively through three distinct modes with high optical modulation, fast switching speed, high bistability, and good cycling stability. The prototype dual-band electrochromic device assembled by AP-WO 3 cathode also delivers an impressive dual-band electrochromic performance with fast-switching speed (6.4 s for coloration and 7.2 s for bleaching).
研究领域:
材料科学
·
电化学
·
光电技术
·
能源效率
·
建筑技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）