Effect of partial pressure of oxygen, target current, and annealing on DC sputtered tungsten oxide (WO3) thin films for electrochromic applications

Kumar, Kiran; Sattar, Sheik Abdul; Shaik, Habibuddin; Reddy, G.V. Ashok; Jafri, R. Imran; Dhananjaya, Merum; Pawar, Amruth S.; Prakash, Nunna Guru; Premkumar, R.; Ansar, Sabah; Chandrashekar, L. N.; Aishwarya, P.

doi:10.1016/j.ssi.2023.116275

Cited by 8 publications

(2 citation statements)

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“…Second, a higher in situ heating temperature conferred greater diffusion ability to the W and O atoms [8,20]. This enhanced diffusion allowed for a more regular rearrangement of atoms from the disordered amorphous WO 3 structure to a crystalline formation, leading to a slight increase in the thicknesses of the films for the WO 3 −100, WO 3 −150, WO 3 −200, WO 3 −250, and WO 3 −300 samples.…”

Section: Surface Morphology Analysismentioning

confidence: 99%

“…Benedict Wen-Cheun Au et al investigated the effect of different post-annealing temperatures on sol-gel spin-coated WO 3 films [6]. K. Naveen Kumar et al studied the effect of in situ heating and post-annealing processes on sputtered WO 3 films [8]. Mengying Wang et al focused on the chromaticity of complementary NiO//WO 3 electrochromic devices by magnetron sputtering [9].…”

Section: Introductionmentioning

confidence: 99%

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Effect of In Situ Heating on the Growth and Electrochromic Properties of Tungsten Trioxide Thin Films

Xu,

Li,

Zhang

et al. 2024

Materials

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Electrochromism has emerged as a pivotal technology in the pursuit of energy efficiency and environmental sustainability, spurring significant research efforts aimed at the creation of advanced electrochromic devices. Most electrochromic materials are used for smart window applications. However, current electrochromic materials have been applied to new energy vehicles, cell phone back covers, AR glasses, and so on. More application scenarios put forward more requirements for the color of the colored states. Choosing the right color change in the application will be the trend in the future. In this work, tungsten trioxide (WO3) thin films were prepared by adjusting the in situ heating temperature. WO3 with a crystalline structure showed excellent cyclic stability (5000 cycles), electrochromic performance (ΔT = 77.7% at 633 nm, CE = 37.1 cm2/C), relatively fast bleaching/coloring speed (20.0 s/19.4 s), and the darkest coloring effect (L* = 29.32, a* = 7.41, b* = −22.12 for the colored state). These findings offer valuable insights into the manipulation of smart materials and devices, contributing to the advancement of electrochromic technology.

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Section: Surface Morphology Analysismentioning

confidence: 99%