Materials
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2020
·Vol. 13
·期 5
·1206
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IF 3.057
Danni Zhang,Baolin Sun,Hui Huang,Yongping Gan,Yang Xia,Chu Liang,Wenkui Zhang,Jun Zhang
Solar-driven electrochromic smart windows with energy-storage ability are promising for energy-saving buildings. In this work, a flexible photoelectrochromic device (PECD) was designed for this purpose. The PECD is composed of two flexible transparent conductive layers, a photocatalytic layer, an electrochromic material layer, and a transparent electrolyte layer. The photocatalytic layer is a dye-sensitized TiO2thick film and the electrochromic layer is a WO3thin film, which also possesses a supercapacitive property. Under illumination, dye-sensitized TiO2thick film realizes photo-drive electrochromism that the WO3changes from colorless to blue with large optical modulation. Meanwhile, the PECD has an electrochemical supercapacitance showing an energy storage property of 21 mF·cm−2(114.9 F·g−1vs the mass of WO3), stable mechanical performance and long cycle performance. The PECD can effectively adjust the transmittance of visible and near-infrared light without any external power supply, realizing zero energy consumption, and can convert solar energy into electrical energy for storage.Keywords:photoelectrochromic devices (PECD);dye-sensitized solar cells (DSSC);electrochromic devices (ECD);smart windows;flexible devices
研究领域:
材料科学
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能源技术
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纳米技术
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DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
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2024
·
IF 2.8
Lu Li,Weiyi Chen,Meng Wang,Xinjiang Shi,Shiming Zhang,Debao Xiao
In this paper, we present the first application of organic hole-transporting semiconductors 4,4′,4′'-tris(carbazol-9-yl)triphenylamine (TCTA) and 4,4′-cyclohexylbis[N,N-bis(4-methylphenyl) aniline] (TAPC) in electrochromism area, demonstrating that TCTA or TAPC is suitable for use as hole-transporting materials on the anode of 1,1′-bis(3-sulfopropyl) viologen (SPV)-based electrochromic devices. For such devices, we obtain a decreased driving voltage of SPV-based electrochromic devices down to −2.0 V in the presence of TCTA or TAPC with comparison to that of ca. −2.5 V in the absence of the hole-transporting material. The optical contrast of the device increased from 57.19 % (without hole-transport layer) to 66.41 % (TCTA) or 62.97 % (TAPC) at 533 nm. The response time of 66.2 s in the absence of hole-transporting layer can decrease to 30.6 s with TCTA and 62.7 s with TAPC, respectively. The coloration efficiency of the as-fabricated devices at 533 nm can reach from 67.3 cm 2 /C (SPV-only) up to 153.2 cm 2 /C (TCTA) and 80.5 cm 2 /C (TAPC). This work paved a new way for boosting electrochromic performances of viologen-based devices via electrode modification of anode by hole-transporting material TCTA and TAPC which have been used effectively and efficiently in organic electroluminescent devices and solar cells.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
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2018
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IF 5.018
Mingjun Pan,Shan Zhao,Long Ma,Nan Wu,Debao Xiao
Two novel all-in-one electrochromic devices have been fabricated on the basis of low-cost and environmentally benign marine brown algae laminaria japonica, and jellyfish, which were both utilized as electronic component (gel electrolytes) in combination with electrochromic viologen bis(3-hydroxypropyl) viologen dibromide, and electron mediators 1,1′-ferrocene dicarboxylic acid and 1,1′-ferrocenedimethanol. The electrochromic performance of the as-fabricated devices was tested. The two biological ECDs exhibited driving voltages as low as 1.1 V, which is superior to many traditional viologen-based ECDs. Moreover, following the principles of green chemistry, no waste and organic solvents were introduced during the room-temperature device assembly. Based on abundant content of biological tissues, the device can be presented as a proof-of-concept to find potential applications in the fields of low-cost, green and large-scale ECDs.
研究领域:
材料科学
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生物学
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环境科学
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DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 5
·742
·
IF 4.329
Wanyu Chen,Siyuan Liu,Le Guo,Guixia Zhang,Heng Zhang,Meng Cao,Lili Wu,Tianxing Xiang,Yong Peng
An ionic liquid-based ionically cross-linked gel polymer electrolyte (GPE-ILs) was successfully synthesized using acrylic acid, 2-diethylaminoethyl methacrylate, methyl methacrylate, and ionic liquids. Electrochromic devices (ECDs) with an architecture of glass/FTO/WO3/GPE-ILs/FTO/glass were fabricated by a laminating technology. The devices showed performances of large optical modulation of 49.9% at 650 nm, short switching times with the coloration time (tc) of 7 s and the bleaching time (tb) of 4 s, high coloration efficiency of 96.2 cm2C−1, and cycling stability of 200 cycles. The GPE-ILs exhibits high ionic conductivity, superior thermal stability and good self-healing ability. GPE-ILs demonstrates an ionic conductivity of 3.19 × 10−3S cm−1at 25 °C and the same ions migration behaviors with most widely used liquid electrolyte between −10 and 80 °C maintains more than 80% of its tensile strength after self-healing and received only 5% weight loss at 300 °C.Keywords:electrochromic device;ionically cross-linked gel;electrolyte;ionic liquids
研究领域:
材料科学
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能源技术
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Aiguo Rao,Shiyu Zhang,Junjie Hu,Luyi Zheng,Qi Yao,Kai Lin,Chunhui Niu,Lei Wang,Mingqing Yang,Yong Lv,Qingshan Chen
In recent years, Fabry-Perot (F-P) cavity-type electrochromic devices composed of more stable inorganic materials have been extensively investigated for achieving colorful reflective displays and military camouflage functions. However, the majority of reported substrates for colorful F-P cavity electrochromic devices are rigid conductive glasses, which hinders their practical application in flexible reflective displays and camouflage. Herein, we construct a WO 3 /W/Au bilayer F-P cavity multicolor tunable electrochromic device based on a flexible porous filter membrane, in which WO 3 , an inorganic electrochromic material, is used as the electrochromic layer, metallic W as the partial reflective layer, and metallic Au as the total reflective and conductive layer. Highly flexible bilayer F-P cavity multicolor electrochromic devices have been prepared by combining UV-curable electrolytes and thermoplastic sealing procedures. By adjusting the thickness of the WO 3 layer, a wide spectrum of colors including yellow, purplish red, violet, blue, green, olivine, peach, etc. can be obtained. In addition, by adjusting the driving voltage of the electrochromic device, more precise color adjustment can be achieved. The electrochromic device has a fast coloring (2.06 s) and bleaching (2.70 s) response time, providing a new solution for future flexible colorful reflective display devices.
研究领域:
材料科学
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光学工程
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电子工程
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DOI
高影响因子
ELECTROCHIMICA ACTA
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2022
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IF 7.336
Guodong Liu,Ling Zheng,Zhuoqing Zhang,Yu Liu,Zhijian Li
The rational preparation and design of electrochromic devices (ECDs) are important for practical application, as integrated on packaging products to express key information by means of some intelligent technologies. This work aims to construct homogeneous film of poly (3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT:PSS) adopting organic solvents doping and gravure printing on a paper substrate. The formed PEDOT:PSS film is shown to provide successfully the desired high conductivity and excellent stability after mild post-treatment via formic acid . The intrinsic reason for the conductivity enhancement is disclosed and correspondingly discussed. The prepared PEDOT:PSS film thus functions in parallel as an electrochromic and electrode layer in assembled ECDs. The two-layer ECD supports a well-defined electrochromic contrast (Δ E * = 20.5), high light absorption property (0.27) at 650 nm, fast switching, and high coloration efficiency (122.8 cm 2 C −1 ) at a low potential of |2.0| V. More importantly, the intelligent operation of the electrochromic unit is launched using wireless driving rather than external working voltage as usual. In application, the driving voltage for ECDs is obtained from the screen-printed induction coil that can be coupled with the magnetic field of near field communication (NFC) equipped in a smartphone. Thus, the wireless driven electrochromic system can be additionally integrated on the package together with a printed ECD in order to display the product pattern under the interaction of the smartphone, improving the interactivity between packaging products and consumers, thereby having high potential for application in the fields of intelligent packaging.
研究领域:
材料科学
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电子工程
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智能技术
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产品关联
DOI
高影响因子
Matter
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2024
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IF 17.3
Qinqi Zhou,Peipei Shao,Renfu Zhang,Siyuan Huang,Yiwen Zhang,Ying Zhu,Menghan Yin,Gunnar A. Niklasson,Rui-Tao Wen
Ion trapping in electrodes upon long-term cycling is found to be one of the main reasons for performance degradation in electrochromic devices. Galvanostatic and potentiostatic post-treatments can rejuvenate degraded electrochromic layers. However, these procedures require high oxidation potentials, which are neither safe for the electrode-electrolyte system nor compatible with the operation of a full device. In the present paper, we report that degraded electrochromic oxides can be rejuvenated by a photo-electrochemical synergistically induced ion detrapping procedure. The UV light-induced photocurrent assists ion detrapping and limits the applied potential to the safe range used for electrochromic switching. This approach has been demonstrated to be effective for several cathodic electrochromic oxides and can be directly implemented in a full device. Our findings provide new vistas for efforts to expand the lifespan of electrochromic devices and other ion intercalation-based devices.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
Nano Energy
·
2025
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IF 17.1
Meimei Zhu,Shuhan Cao,Shunyu Wang,Xingchen Liu,Xiangwen Wu,Dongwen Zou,Hongyang Li,Yaowu He,Hong Meng
Donor-Acceptor (D-A) copolymers are critical for cost-effective and energy-efficient electrochromic devices (ECDs) and smart windows. In this study, a type of copolymers with dual-introduction of alkyl thiophene as π spacer and fluorine are designed for highly efficient ECDs, contributing to superior color efficiency (CE). Through π spacer modification, the twist angle as well as the optical bandgap of the copolymers (PDT-Th-BT) are minimized via blocking the F…O noncovalent repulsive interaction. ECDs based on PDT-Th-BT1F are achieved with high CE of 1440 cm²/C, along with electrochromic contrast up to 41.6%. This CE is the best yet among ECDs based on fluorination D-A type copolymers according to literature. Furthermore, smart window made from PDT-Th-BT1F contribute a 5 ℃ cooling down compared to the glass in the building models and an energy saving of 631,257.14 kWh in a 26,404.54 m 2 building model, greatly conducive to environmental protection. This work presents a viable strategy for the development of highly efficient ECDs and smart windows.
研究领域:
材料科学
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能源技术
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
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2020
·Vol. 138
·期 1
·49622
·
IF 2.52
Feifei Lu,Peiyu Tan,Yuge Han
Polyaniline (PANI) films and its electrochromic devices based on various porous substrates were obtained by electrochemical deposition. The pore size distribution of the porous substrate has shown important influence on the infrared emissivity variation (∆ ε ) of the device. Morphology and structure of PANI were characterized by scan electronic microscopy (SEM) images and Fourier transform infrared spectra (FTIR). SEM images present the morphology difference of PANI on different substrates, which suggest that large pores will prevent PANI particles from forming orderly and compactly films. FTIR spectrum indicates that pore size of substrates affects the orientation of PANI chains. Furthermore, electrochemical properties and stability of PANI films were analyzed by cyclic voltammetry (CV) curves. And the CV curve revealed that the generation of irreversible degradation products is the reason for poor stability of PANI films. Finally, greatly improved ∆ ε of 0.559 in 3–5 μm waveband and 0.39 in 8–14 μm waveband is achieved by choosing a small pore substrate.
研究领域:
材料科学
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光学工程
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Tingting Hao,Shen Wang,Hongbo Xu,Xiang Zhang,Shlomo Magdassi,Lei Pan,Ying Song,Yao Li,Jiupeng Zhao
The application of flexible indium tin oxide (ITO)-free electrochromic devices (FCDs) has always been a research hotspot in flexible electronics. Recently, a silver nanowire (AgNW)-based transparent conductive film has raised great interest as an ITO-free substrate for FCDs. However, several challenges, such as the weak binding of AgNWs to the substrate, high junction resistance, and oxidation of AgNWs, remain. In this paper, a novel method for surface modification of AgNWs with N-aminoethyl-γ-aminopropyltrimethoxysilane [Si(NH2)] solution is proposed to enhance the bonding with the flexible substrates and the active materials, thereby inhibiting the delamination of AgNWs from the substrate and reducing the high junction resistance between nanowires. The TiO2/AgNW–Si(NH2)/poly(ethylene terephthalate) (PET) films show outstanding mechanical properties, of which the resistance remains almost unchanged after mechanical bending of 5000 cycles (ΔR/R0 ≈ 3.6%) and repeated peeling off cycles with 3M tape 100 times (ΔR/R0 ≈ 6.0%). In addition, we found that the oxygen-containing groups on the TiO2/AgNW–Si(NH2)/PET surface form hydrogen bonds with the TiO2 sol, resulting in tight contact between the TiO2 sol and the AgNWs, which prevents the AgNWs from oxidation. As a result, the TiO2/AgNW–Si(NH2)/PET film exhibited long-time aging (ΔR/R0 ≈ 4.9% in the air for 100 days) stability. A FCD was constructed with the TiO2/AgNW–Si(NH2)/PET film, which showed excellent electrochromic performance (94% retention) after 5000 bending cycles, indicating high stability and mechanical flexibility. These results present a promising solution to the transparent conductive films for flexible energy devices.
研究领域:
材料科学
·
柔性电子技术
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Hongying Liu,Mengying Wang,Xu Wang,Agnieszka Pawlicka,Xungang Diao
3D, porous, low-dimensional, and nanostructured V 2 O 5 films have significant potential for application in ECDs, but their development is still in its nascency. This paper reports a facile strategy of using PEG as a structure-directing agent and short-time heat treatments to obtain 3D, porous, and hierarchical V 2 O 5 films comprising interpenetrating stacked ultra-long nanowire surfaces and nanorod/nanosheet mixed interiors deposited on ITO-glass substrates. The mechanism of morphological transformation was studied in detail, and the analysis shows that the formation of such special structured films is a synergetic result of the guided intercalation of PEG, atomic rearrangement, Ostwald ripening, anisotropy of crystal growth, and orientation attachment mechanism. Among them, the preferred PEG addition amount of 25 % for the 350-3-V 2 O 5 film was applied in two types of all-solid-state ECDs: one using a gel quasi-solid electrolyte and the other using a solid-film electrolyte. The 350-3-V 2 O 5 film served as an ion storage coating and WO 3 was the electrochromic layer. These devices achieved ideal reversible switching of transmissive-to-black electrochromic characteristics. Notably, the ‘Integrated-Type’ ECD, composed of inorganic all-solid-state films, has a large optical modulation range ΔT = 72.0 %, rapid switching responses (colouration 25.4 s and bleaching 20.8 s), and sustained electrochromic performance.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Hengzhi Zhang,Yulin Liu,Shengwei Tang,Xiaolong Weng,Yong Xiang,Chunyang Jia
The potential of polyaniline (PANI)-based electrochromic devices (ECDs) to offer adaptive anti-surveillance stealth in the visible/infrared bands is considerable. However, the incompatibility between infrared and radar stealth renders it challenging to achieve compatibility between the two with PANI-based ECDs. In this work, an etched electrode with frequency-selective surface configurations is initially designed for selective transmission and reflection of microwaves. Subsequently, a stellate PANI is prepared on the electrode surface by introducing triphenylamine (TPA) modification into the long molecular chain of disordered PANI, and assembled into a multi-spectrum compatible ECD. The results demonstrate that the ECD can achieve efficient transmission between 10.2–13.9 GHz, with a transmission rate approaching 90 % at 11.92 GHz, and enables the visible characteristics to switch between jungle dark green and desert earthy yellow. Furthermore, thermal-infrared emissivity ( ε ) modulation is achieved in the atmospheric transmission windows of 3–5 μm and 8–14 μm, with maximum emissivity change (Δ ε ) of 0.61 and 0.73, respectively. The ECD demonstrated the capacity to exceed the limitations of static camouflage associated with existing multi-spectrum stealth materials, and exhibited a high degree of adaptability in intelligent electromagnetic confrontation environments.
研究领域:
材料科学
·
电磁学
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光学工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）