Enhanced electrochromic coloration in Ag nanoparticle decorated WO3 thin films

Kharade, Rohini R.; Mali, Sawanta S.; Patil, Sachin; Patil, K.R.; Gang, Myeng Gil; Patil, Pramod S.; Kim, Jin Hee; Bhosale, Popatrao N.

doi:10.1016/j.electacta.2013.03.123

Cited by 79 publications

(39 citation statements)

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“…On the other hand as the back e.m.f. allows the mobility of H + ions during bleaching it promotes the formation of illdefined anodic peak [56,57]. The asymmetry in the current curve is due to the difference in kinetics of ion intercalation and deintercalation [58,59].…”

Section: Cyclic Voltammetrymentioning

confidence: 98%

“…In this connection, Kharade et al [56] have used chronocoulometric analysis to portrait the charge-time dependence as an Anson plot and indicated that the process involved was diffusion controlled.…”

Section: Chronocoulometrymentioning

confidence: 98%

“…The only difference was that in chronocoulometry charge rather than current was measured with time following a potential step, reaching a maximum at the end of the step. Due to this, chronocoulometry is favored over chronoamperometry for diffusion coefficient measurements [56]. Table 4 Since charge is the integral of current with respect to time, response for the CC experiment can simply be obtained by integrating the current response for the CA experiment.…”

Section: Chronocoulometrymentioning

confidence: 99%

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Influence of Dopant Concentration on the Electrochromic Properties of Tungsten Oxide Thin Films

Meenakshi

Gowthami

Perumal

et al. 2015

Electrochimica Acta

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Section: Cyclic Voltammetrymentioning

confidence: 98%

Section: Chronocoulometrymentioning

confidence: 98%

Section: Chronocoulometrymentioning

confidence: 99%

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Influence of Dopant Concentration on the Electrochromic Properties of Tungsten Oxide Thin Films

Meenakshi

Gowthami

Perumal

et al. 2015

Electrochimica Acta

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“…Among them, tungsten trioxide (WO 3 ) is used in many electronic devices because of its tunable properties of chemical composition, surface morphological, optical absorption in visible range and high the rmalstability 6,7 . Several preparation techniques have been used to deposit tungsten oxide thin films, including sol-gel, spray pyrolysis, chemical vapour deposition, RF sputtering, plasma evaporation, electrodeposition, etc [8][9][10][11][12][13][14][15][16][17][18] . In fact, spray pyrolysis is one of the most versatile techniques to deposit oxide films, allowing the control of many properties of the films by changing the preparation parameters of the technique.…”

Section: Introductionmentioning

confidence: 99%

Growth and Characterization of Jet Nebulizer Spray Deposited n-type WO3 thin films for Junction Diode Application

Shanmugasundaram¹,

Thirunavukkarasu²,

Ramamurthy³

et al. 2017

Orient. J. Chem

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The n-type tungsten oxide (WO 3 ) polycrystalline thin films have been prepared at an optimized parameters (0.20M, 5 ml and 500 o C) using jet nebulizer spray pyrolysis (JNSP) technique. Such prepared WO 3 films were characterized by XRD, SEM, EDAX, UV-vis from I-V. The XRD pattern of the optimized WO 3 film reveals the monoclinic structure. The SEM and EDAX images shows that the surface morphological variations and elements present were confirmed. The optical properties were recorded by UV-vis spectrum and the maximum band gap value was observed as 3.86 eV for 500°C. The maximum conductivity of the prepared WO 3 was recorded as 1.201 x 10 -8 S/cm from I-V characterization for 500°C.Using J-V plot, the diode parameters of n-WO 3 /p-Si prepared at 500°C with 0.2 M and 5 ml were measured under dark and illumination. The ideality factor (n) and barrier height (Φ b ) values of n-WO 3 /p-Si diode are obtained as 5.8 and 0.80 eV in dark and 3.9 and 0.81 eV under illumination.

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“…4,16,17 Tungsten-based oxides are an important class of materials that display wide potential functional properties, [18][19][20] speci-cally the silver tungstate (Ag 2 WO 4 ) compound, which can exhibit three different structures: a-orthorhombic, b-hexagonal, and g-cubic. [21][22][23][24][25] Recently, our research group reported a detailed study of the synthesis, structural and optical properties of hexagonal nanorod-like elongated a-Ag 2 WO 4 nanocrystals obtained by different methods.…”

mentioning

confidence: 99%

A novel ozone gas sensor based on one-dimensional (1D) α-Ag₂WO₄ nanostructures

et al. 2014

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aThis paper reports on a new ozone gas sensor based on a-Ag 2 WO 4 nanorod-like structures. Electrical resistance measurements proved the efficiency of a-Ag 2 WO 4 nanorods, which rendered good sensitivity even for a low ozone concentration (80 ppb), a fast response and a short recovery time at 300 C, demonstrating great potential for a variety of applications.Metal semiconducting oxides have drawn the interest of many researchers due to their wide range of applications, especially as gas sensing materials. 1-5 Among them, one-dimensional (1-D) semiconductor nanostructures have been proposed as very interesting materials, especially as gas sensor devices.6-12 It is well known that several technological applications of nanostructured materials are directly related to the morphology, particle size, crystalline phase and activity of specic crystalline planes strictly dependent on synthesis methods. 4,[13][14][15] In particular, the relationship between morphology and gas sensing properties has been well established. 4,16,17Tungsten-based oxides are an important class of materials that display wide potential functional properties, 18-20 speci-cally the silver tungstate (Ag 2 WO 4 ) compound, which can exhibit three different structures: a-orthorhombic, b-hexagonal, and g-cubic.21-25 Recently, our research group reported a detailed study of the synthesis, structural and optical properties of hexagonal nanorod-like elongated a-Ag 2 WO 4 nanocrystals obtained by different methods. 26-28Ozone (O 3 ) is an oxidizing gas used in many technological applications in different areas, such as the food industry, drinking-water treatment, medicine, microelectronic cleaning processes, and others.29,34-39 For example, ozone has been employed as a powerful drinking-water disinfectant and oxidant. 34,35,40 On the other hand, when the ozone level in an atmosphere exceeds a certain threshold value, the exposure to this gas becomes hazardous to human health and can cause serious health problems (e.g. headache, burning eyes, respiratory irritation and lung damage).34,41 The European Guidelines (2002/3/EG) recommend avoiding exposure to ozone levels above 120 ppb.41 Such arguments support the requirement for the determination and continuous monitoring of ozone levels. 3,29,41Gas sensing properties are evaluated in terms of operating temperature, sensitivity, response time, recovery time and stability.29-33 SnO 2 , In 2 O 3 and WO 3 compounds have been considered the most promising ozone gas sensors. 29-33To the best of our knowledge, to date the gas sensing properties of a-Ag 2 WO 4 nanocrystals have never been evaluated.Here, we report the sensing properties of 1-D a-Ag 2 WO 4 nanorod-like structures obtained by the microwave-assisted hydrothermal (MAH) method.42-46 Because of such properties, nanorods are potential candidates for practical applications as ozone gas sensors.The crystalline phase of the as-obtained a-Ag 2 WO 4 sample was analyzed by X-ray diffraction measurement and all reec-tions were indexed to an orthorhombic struc...

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Enhanced electrochromic coloration in Ag nanoparticle decorated WO3 thin films

Cited by 79 publications

References 50 publications

Influence of Dopant Concentration on the Electrochromic Properties of Tungsten Oxide Thin Films

Influence of Dopant Concentration on the Electrochromic Properties of Tungsten Oxide Thin Films

Growth and Characterization of Jet Nebulizer Spray Deposited n-type WO3 thin films for Junction Diode Application

A novel ozone gas sensor based on one-dimensional (1D) α-Ag₂WO₄ nanostructures

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Enhanced electrochromic coloration in Ag nanoparticle decorated WO3 thin films

Cited by 79 publications

References 50 publications

Influence of Dopant Concentration on the Electrochromic Properties of Tungsten Oxide Thin Films

Influence of Dopant Concentration on the Electrochromic Properties of Tungsten Oxide Thin Films

Growth and Characterization of Jet Nebulizer Spray Deposited n-type WO3 thin films for Junction Diode Application

A novel ozone gas sensor based on one-dimensional (1D) α-Ag2WO4 nanostructures

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A novel ozone gas sensor based on one-dimensional (1D) α-Ag₂WO₄ nanostructures