Electrochromic properties of organic-inorganic composite materials

Liu, Weishi; Zhang, Xiaoyuan; Liu, Jianqiang; Ma, Xiaodan; Zeng, Jinming; Liu, Ping; Xu, Tiangui

doi:10.1016/j.jallcom.2017.05.222

Cited by 40 publications

(20 citation statements)

References 38 publications

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“…Studying the dielectric properties is an indispensable means for detecting changes in the phases, properties and behavior pertaining to the studied compound on the application of an electric field. [26,27] In our case, this study is conducted as a function of a temperature range of [300 K-600 K] and a frequency ranging between 100 Hz and 10E 6 Hz. The temperature dependency of the relative dielectric constant with fixed frequency is depicted in Figure 4.…”

Section: Ferroelectric Behaviormentioning

confidence: 99%

“…This technique permitted us to distinguish the origin of the dielectric relaxation mechanism (associated with the dynamics of bound or mobile charges in the bulk or interfacial regions of the studied materials). Figure 8 depicts the variation of complex impedance data (in the form of Nyquist plots) for the selected temperature [438 K-647 K] over a wide range of frequencies [10 3 Hz-10 6 Hz]. Therefore, we distinguish the presence of one semicircle attributed to the grain contribution, and a proposed circuit model comprising one parallel (R//C//CPE) circuit, which was found to be in concordance (solid line) with that of experimental data (full dot) for the material.…”

Section: Impedance Studymentioning

confidence: 99%

“…Tungsten oxide (WO 3 ) is used for photochromic material as well as for amorphous metallic material . Besides, it is integrated in the electroactive organic–inorganic composite . Tungsten is a thermal stable material with a melting point of about 3380 °C and a boiling point of about 5900 °C.…”

Section: Introductionmentioning

confidence: 99%

“…[5] Besides, it is integrated in the electroactive organic-inorganic composite. [6] Tungsten is a thermal stable material with a melting point of about 3380°C and a boiling point of about 5900°C. Moreover, it is recyclable and not considered as health hazard diet, due to its high coloration efficiency, good reversibility ratio, fast colorization bleaching speed and long cyclic stability.…”

Section: Introductionmentioning

confidence: 99%

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Ferroelectric and electrical properties of LiNaWO₄ compound

Krimi

Karoui

Zghal

et al. 2019

Applied Organom Chemis

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The aim of this work is to elaborate the LiNaWO4 compound, using the solid state method, then to characterize it using an XR study which confirms that it crystallizes in the orthorhombic system with P222 as space group and with the lattice parameters a = 12.82 Å, b = 17.49 Å, c = 7.25 Å and α = β = γ = 90°. The differential scanning calorimetry (DSC) shows two endothermic peaks at T1 = 388 K and T2 = 500 K. The first peak is detected by the dielectric study, attributed to a phase transition from a ferroelectric phase to a paraelectric one, while the second peak indicates the presence of a phase transition, confirmed later by the result of the electrical study. All modes pertaining to vibrations of WO42− tetrahedral appear in the Raman spectrum. Moreover, its impedance response is modeled by a single cell formed by a parallel combination of R//C//CPE, i.e. the response of our compound is that of the grain. The variation of the σg and σdc, as a function of temperature, confirms the phase transition observed in the calorimetric study at T2. The conduction mechanism in the two phases indicates that the first phase (I) is described by the CBH model and the second phase by the OLPT model.

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Section: Ferroelectric Behaviormentioning

confidence: 99%

Section: Impedance Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ferroelectric and electrical properties of LiNaWO₄ compound

Krimi

Karoui

Zghal

et al. 2019

Applied Organom Chemis

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“…Their solid films showed reversible color changes upon electrochemical doping and dedoping. In addition, star‐shaped conjugated oligothiophene derivatives were also synthesized and their electrochromic properties were investigated …”

Section: Introductionmentioning

confidence: 99%

Multicolored, Low‐Voltage‐Driven, Flexible Organic Electrochromic Devices Based on Oligomers

Wan

Zeng

et al. 2018

Macromol. Rapid Commun.

Self Cite

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In this study, a series of organic conjugated oligomers containing 3,4-ethylenedioxythiophene (EDOT) and aromatic groups are synthesized, which are as follows: 2,5-di(methyl benzoate)-3,4-ethylenedioxy-thiophene (1EDOT-2B-COOCH ), 5,5'-di(methyl benzoate)-2,2'-bi(3,4-ethylenedioxythiophene) (2EDOT-2B-COOCH ), 5,5″-di(methyl benzoate)-2,2':5',2″-ter(3,4-ethylenedioxythiophene) (3EDOT-2B-COOCH ), and 5,5″'-di(methyl benzoate)-2,2':5',2″: 5″,2″'-quater(3,4-ethylenedioxythiophene) (4EDOT-2B-COOCH ). Using these oligomers as active materials, flexible organic electrochromic devices are fabricated. The device structure is indium tin oxide-PET plastic slide (ITO-PET)/active layer/conducting gel/ITO-PET, and the electrochromic properties of oligomers are investigated. These oligomers exhibit reversible color changes upon electrochemical doping and dedoping. The highest optical contrast is exhibited by 4EDOT-2B-COOCH , which is 75.2% at 700 nm.

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Comparative Analysis of Structural, Optical, and Electronic Properties of Nickel Oxide and Potassium‐Doped Nickel Oxide Nanocrystals

Karishma,

Tripathi,

Pandey

et al. 2024

Energy Storage

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Metal oxide semiconductors, known for their exceptional optical transparency, high carrier mobility, and stability, have found extensive use in emerging technologies such as optoelectronics and energy storage devices. Among all metal oxide semiconductors, nickel oxide (NiO) stands out as a highly favorable candidate due to its p‐type conductivity along with its substantial band gap (3.5–4 eV) for the broad range of applications, including gas sensors, high‐rate Lithium‐ion batteries, high‐performance supercapacitors, and photovoltaic devices. In light of these versatile applications, our current study presents a comprehensive comparative analysis of the structural and optoelectronic properties of NiO and potassium (K)‐doped NiO nanocrystals. The nanocrystals were synthesized using the co‐precipitation route and subsequently annealed at 500°C under ambient conditions. The effect of K doping on the structural and optoelectronic characteristics was systematically examined using various techniques, including x‐ray diffraction, UV–visible spectroscopy, Raman spectroscopy, and Hall effect measurements. To explore the structural characteristics, XRD measurements were performed, which confirm the FCC structure of nanocrystals. The optical property analysis suggested that the formation of the energy level can contribute to reduction of the band gap. A sharp peak at 397 cm−1 is associated with NiO bond in FTIR spectra which verifies the formation of nanocrystals. Moreover, the incorporation of K increases the intensity of the Raman peaks, which provides evidence for the higher degree of crystallinity in doped samples. These results of Raman scattering are in good agreement with XRD outcomes. In addition, the resistivity of NiO nanocrystals decreases monotonically with the increasing K concentration. The results of temperature‐dependent resistivity further demonstrate that electrons required more energy to jump from one polaron state to another in the case of x = 0.01 M and 0.03 M doped Ni0.5‐xKxO samples. The combination of a diminished band gap and enhanced conductivity makes these materials exceptionally promising for applications in optoelectronics and energy storage.

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Electrochromic properties of organic-inorganic composite materials

Cited by 40 publications

References 38 publications

Ferroelectric and electrical properties of LiNaWO₄ compound

Ferroelectric and electrical properties of LiNaWO₄ compound

Multicolored, Low‐Voltage‐Driven, Flexible Organic Electrochromic Devices Based on Oligomers

Comparative Analysis of Structural, Optical, and Electronic Properties of Nickel Oxide and Potassium‐Doped Nickel Oxide Nanocrystals

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Electrochromic properties of organic-inorganic composite materials

Cited by 40 publications

References 38 publications

Ferroelectric and electrical properties of LiNaWO4 compound

Ferroelectric and electrical properties of LiNaWO4 compound

Multicolored, Low‐Voltage‐Driven, Flexible Organic Electrochromic Devices Based on Oligomers

Comparative Analysis of Structural, Optical, and Electronic Properties of Nickel Oxide and Potassium‐Doped Nickel Oxide Nanocrystals

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Product

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Ferroelectric and electrical properties of LiNaWO₄ compound

Ferroelectric and electrical properties of LiNaWO₄ compound