Effect of substrate temperature on electrochromic properties of spray-deposited Ir-oxide thin films

Patil, Pramod S.; Kawar, R.K.; Sadale, S.B.

doi:10.1016/j.apsusc.2004.12.014

Cited by 24 publications

(17 citation statements)

References 19 publications

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“…From the obtained data, the maximum values of DOD and CE (32.36 cm 2 /C) in the T sub =400 o C. Therefore, this temperature is the optimum spray temperature. Results confirm the results of other works [13,25]. Also, the CE was calculated as a function SM.…”

Section: Evaluation Of Colouration Efficiencysupporting

confidence: 77%

“…It is also highly stable material no change with repeated use (~ 50 cycles) and relatively sharp threshold voltage [7]. Thin films of iridium oxide have been prepared using various techniques including thermal oxidation [8], anode oxidation [9], RF-sputtering [10], electrodepositing [11], sol-gel processing [12] and spray pyrolysis [13][14][15]. In the previous paper, thin films of Iroxide were prepared on a heated glass substrate using iridium chloride spraying method (IrCl 3 .3H 2 O) to obtain a single phase with varying degrees of crystallization [14].…”

Section: …………………………………………………………………………………………………… Introduction:-mentioning

confidence: 99%

“…The following coloring and bleaching process is proposed to spray deposited IrO 2 films [20,21]: ) causing bleaching state [12,13,22,23]. Figure 4(a-d) shows the optical transmittance spectrum of the colored and bleached condition of IrO 2 films as a function of SM.…”

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confidence: 99%

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Influence of Growth Conditions on the Electrochromic Efficiency and the Energy Band Gap of Iridium Oxide Thin Films.

Akl¹,

MSalman²,

Kashita³

2017

IJAR

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In the present research, work has been focused on the efficiency of electrochromic properties and energy gap of Ir-oxide thin films as a function of preparative parameters. IrO 2 thin films were deposited onto preheated indium tin oxide (ITO) coated glass substrates by cost effective chemical spray pyrolysis technique (SPT) at different substrate temperature (T sub ) and solution molarity (SM). Electrochromic characteristic of IrO 2 thin films was studied in aqueous electrolyte of 0.1M H 2 SO 4 . The optimum potential difference of coloration and bleaching state at +1.2 and -1.2V, respectively. The results show that, the best value of electrochromic efficiency (CE) and the optical density difference (DOD) λ=630nm were obtained at the conditions of preparation of 400 o C and solution molarity of 0.01M. IrO 2 thin films were found to have a direct transition allowed. The value of energy gap ( …………………………………………………………………………………………………….... Introduction:-The electrochromic process is defined as the material's ability to undergo electrochemical driven reversible light absorption changes [1,2]. Depending on the wavelengths absorbed, the phenomenon of electrochromic can be divided into two types: the visible type that occurs in the range of 350nm to 850nm and the other invisible type that occurs in the range smaller than 350nm and in the range greater than 850nm. The materials that possess this characteristic are the metal transition oxides such as tungsten, nickel, vanadium, etc., which are divided into two basic types of polarization, one of which is anodic and the other is cathodic. Iridium oxide (IrO 2 ) is one of them, an anodic electrochromic material, which is able to change the color from transparent to bluish-black in positive potential and is bleached inversely when negative potential is applied [3]. The study of the physical properties of iridium oxide is important for many applications such as the optical information storage [4], catalyst for the

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Section: Evaluation Of Colouration Efficiencysupporting

confidence: 77%

Section: …………………………………………………………………………………………………… Introduction:-mentioning

confidence: 99%

See 1 more Smart Citation

Influence of Growth Conditions on the Electrochromic Efficiency and the Energy Band Gap of Iridium Oxide Thin Films.

Akl¹,

MSalman²,

Kashita³

2017

IJAR

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“…The Voigt average crystalline size is estimated to be around 14 nm for all preparative conditions. Kawar et al [19], reported a comparable value of crystallite size for similar structural phase prepared by spray pyrolysis technique. Fig.…”

Section: A Formation Of Iridium Oxide Thin Filmsmentioning

confidence: 88%

“…The colouration/bleaching process formula proposed for the spray deposited Ir-oxide thin films is either [2], [19] …”

Section: B Electrochromic Characterizationmentioning

confidence: 99%

Influence of Some Preparative Parameters on Microstructure and Electrochromic Behavior of Sprayed Iridium Oxide Films

Mahmoud¹,

Riad²,

El-Deeb³

et al. 2013

IJAPM

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Abstract-Electrochromic iridium oxide thin films were deposited by spray pyrolysis technique onto indium-doped tin oxide (ITO) coated glass substrates using iridium chloride as an aqueous solution. The influence of the substrate temperature, the deposition period of time and the solution molarity have been investigated as related to the film's electrochromic (EC) performance. The electrochromic properties of the films were investigated in a (0.5M H 2 SO 4 ) aqueous electrolytic solution using cyclic voltammetry (CV). The transmittance has been measured over the spectral wavelength range between 300 and 2400 nm. The substrate temperature (T sub ), the deposition period of time, the solution molarity and the colouration and bleaching potentials were optimized and found to be 400 o C, 10 min, 0.02 M, ±0.8 V, respectively. The films have acquired a maximum transmittance solar modulation ΔT s and a maximum visible modulation ΔTv at 630 nm optimal optical modulation. The iridium oxide films prepared in this work have been deposited onto ITO-coated glass substrates using spray pyrolytic iridium chloride solution as well as the effect of substrate temperature, solution molarity and the deposition time have been investigated and discussed in accordance with the films' electrochromic activation. II. EXPERIMENTAL A. Preparation of Electrochromic Iridium OxideIndium tin oxide (ITO)-coated glass substrates were first cleaned very carefully by ultrasonic degreasing process with isopropanol and deionized water. A set of iridium oxide thin films were then deposited on the ITO-coated glass substrates using the aqueous solution of iridium chloride (IrCl 3 .3H 2 O) under different substrate temperatures, different solution molarity ratios and for various time. The samples were then annealed at 600 o C for 2 hours.The optical transmittance of the films was measured in the wavelength range between 300 nm to 2500 nm using SHIMADZU UV 3101 PC: UV-VIS-NIR double beam spectrophotometer. The electrochromic (EC) characteristics of the iridium oxide thin films deposited onto ITO-coated glass substrates were then investigated at different substrate temperatures (ranging from 350 to 500 o C, in steps of 50 o C) and with solution molarity ratios (between 0.005 and 0.03 M). The iridium oxide thin films deposited onto ITO-coated glass substrates were used as working electrodes in a three-electrode electrochemical cell containing 0.5M H 2 SO 4 solution. The Platinum sheet and saturated calomel electrode (SCE) are used as a counter and reference electrodes respectively.A JEOL X-ray diffractometer (model JSDX-60PA) with Ni-filtered and Cu: Kα radiation ( λK α = 0.154184 nm) was high contrast non emissive information displays [1], [2]. Two categories of electrochromism are defined based on the absorption wavelengths namely; visible electrochromism in the wavelength range of 350 to 850 nm and non-visible electrochromism in the wavelength range < 350 nm and > 850 nm. Iridium oxides are known as anodic electrochromic material in which they are able to...

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Titanium coated with high-performance nanocrystalline ruthenium oxide synthesized by the microwave-assisted sol–gel procedure

Šekularac

Košević

Drvenica³

et al. 2016

J Solid State Electrochem

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Effect of substrate temperature on electrochromic properties of spray-deposited Ir-oxide thin films

Cited by 24 publications

References 19 publications

Influence of Growth Conditions on the Electrochromic Efficiency and the Energy Band Gap of Iridium Oxide Thin Films.

Influence of Growth Conditions on the Electrochromic Efficiency and the Energy Band Gap of Iridium Oxide Thin Films.

Influence of Some Preparative Parameters on Microstructure and Electrochromic Behavior of Sprayed Iridium Oxide Films

Titanium coated with high-performance nanocrystalline ruthenium oxide synthesized by the microwave-assisted sol–gel procedure

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