Structural transition and blue emission in textured and highly transparent spray deposited Li doped WO3 thin films

Kovendhan, M.; Joseph, D. Paul; Kumar, E. Senthil; Sendilkumar, A.; Manimuthu, P.; Sambasivam, Sangaraju; Venkateswaran, C.; Mohan, R.

doi:10.1016/j.apsusc.2011.04.122

Cited by 32 publications

(9 citation statements)

References 46 publications

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“…Except for the methods mentioned above, doping with rare-earth ions (Eu 3+ , Tb 3+ ) [ 40 , 55 , 56 ] or metal ions (Li, Sn, Cu) [ 57 , 58 , 59 , 60 ] in WO 3 is considered as another effective method to improve luminescence performance at room temperature. Luo et al prepared Eu 3+ doped WO 3 TFs by hydrothermal method.…”

Section: Photoluminescence Propertiesmentioning

confidence: 99%

“…They proposed that the structure and optical characteristics of WO 3 TFs changed with the increase of lithium, and observed blue PL emission that was difficult to detect at room temperature. The bandgap values of WO 3 TFs doped with Li (1–5 wt.%) shifted blue, and the blue emission increased dramatically, as compared to pure WO 3 TFs [ 57 ]. Mukherjee et al investigated the preparation of Sn-doped WO 3 TFs by chemical spray pyrolysis.…”

Section: Photoluminescence Propertiesmentioning

confidence: 99%

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A Review on the Properties and Applications of WO3 Nanostructure−Based Optical and Electronic Devices

et al. 2021

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Tungsten oxide (WO3) is a wide band gap semiconductor with unintentionally n−doping performance, excellent conductivity, and high electron hall mobility, which is considered as a candidate material for application in optoelectronics. Several reviews on WO3 and its derivatives for various applications dealing with electrochemical, photoelectrochemical, hybrid photocatalysts, electrochemical energy storage, and gas sensors have appeared recently. Moreover, the nanostructured transition metal oxides have attracted considerable attention in the past decade because of their unique chemical, photochromic, and physical properties leading to numerous other potential applications. Owing to their distinctive photoluminescence (PL), electrochromic and electrical properties, WO3 nanostructure−based optical and electronic devices application have attracted a wide range of research interests. This review mainly focuses on the up−to−date progress in different advanced strategies from fundamental analysis to improve WO3 optoelectric, electrochromic, and photochromic properties in the development of tungsten oxide−based advanced devices for optical and electronic applications including photodetectors, light−emitting diodes (LED), PL properties, electrical properties, and optical information storage. This review on the prior findings of WO3−related optical and electrical devices, as well as concluding remarks and forecasts will help researchers to advance the field of optoelectric applications of nanostructured transition metal oxides.

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Section: Photoluminescence Propertiesmentioning

confidence: 99%

Section: Photoluminescence Propertiesmentioning

confidence: 99%

A Review on the Properties and Applications of WO3 Nanostructure−Based Optical and Electronic Devices

et al. 2021

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“…Moreover, the intrinsic reaction mechanism of WO 3 /electrolyte interfaces in various electrolytes has been reported in previous studies [12][13][14][15]. Heretofore, WO 3 thin films have been grown by different techniques such as physical vapor deposition (PVD), chemical vapor deposition (CVD) [16], evaporation [17][18][19], electrodeposition [20], sputtering [21,22], sol-gel deposition [19,23] and spray pyrolysis technique [24][25][26][27]. The latter technique presents many advantages such as: (i) short time deposition, (ii) simple technology, (iii) low-cost, (iv) lake of need to vacuum, and (v) large scale area of thin film production.…”

Section: Introductionmentioning

confidence: 96%

“…Many researchers have devoted themselves to study WO 3 thin films prepared under different spray rates [20] and the effect of annealing temperature on the structural, surface morphological and optical properties of WO 3 films [17,21,23,28,29]. This article presents the influence of the deposition rate and annealing process on various physical properties of WO 3 thin films grown by spray pyrolysis method.…”

Section: Introductionmentioning

confidence: 99%

Enhancing electrical and thermoelectrical properties of $\mathrm{WO}_3$ thin films by spray pyrolysis technique

Asghari¹,

Zad²

2019

Preprint

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Tungsten trioxide WO 3 thin films have been deposited on glass substrates by spray pyrolysis technique with three different rates R 1 = 1 ml/min (sample A 1 ), R 2 = 3 ml/min (sample A 2 ) and R 3 = 7 ml/min (sample A 3 ). We have then annealed all samples for 2 h at 500 • C in air. Structural, morphological, optical and electrical properties of WO 3 thin films are investigated in detail. According to the FESEM images, all layers are formed in various circular strings with different diameters. The diameter of each strain decreases when the deposition rate increases. The XRD structural analysis indicates that before annealing, except the lowest deposition rate sample R 1 with a polycrystalline nature and mixed tetragonal and hexagonal phases, other samples are grown in an amorphous phase. After annealing, sample A 2 (with rate R 2 = 3 ml/min) remains in an amorphous phase, while samples A 1 and A 3 (with the corresponding rates R 1 = 1 ml/min and R 3 = 7 ml/min respectively) are polycrystalline. Moreover, from UV-Vis. spectra analysis we found that by increasing spray rate the band gap of the layers monotonically decreases. This phenomenon is the result of attenuation of the quantum confined effect. The thermoelectric properties confirm being n-type conductivity of the layers, also variation in the current-voltage characteristic is in accordance with the oxygen vacancies sites. We found that the sample A 3 with the highest rate has lowest resistivity.

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“…Hence, various metal ions such as Co 2+ , Cu 2+ , Zn 2+ , Cr 3+ and Ti 4+ have been tentatively doped into WO3 nanomaterials [25][26][27][28][29]. For example, Kovendhan reported that 5% Li-doped WO3 resulted in blue-shift of photoemission and structural change from the orthorhombic to tetragonal phase [30]. Boubaker investigated the Zn/In-doped WO3 and proposed that quantum-linked lattice disorder could influence the final photoresponse [31].…”

mentioning

confidence: 99%

Microwave–assisted synthesis of nanoscale tungsten trioxide hydrate with excellent photocatalytic activity under visible irradiation

Liu

Shen

et al. 2020

Inorganic Chemistry Communications

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Structural transition and blue emission in textured and highly transparent spray deposited Li doped WO3 thin films

Cited by 32 publications

References 46 publications

A Review on the Properties and Applications of WO3 Nanostructure−Based Optical and Electronic Devices

A Review on the Properties and Applications of WO3 Nanostructure−Based Optical and Electronic Devices

Enhancing electrical and thermoelectrical properties of $\mathrm{WO}_3$ thin films by spray pyrolysis technique

Microwave–assisted synthesis of nanoscale tungsten trioxide hydrate with excellent photocatalytic activity under visible irradiation

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