13 November 2001 Optical and electrochromic properties of amorphous and crystalline tungsten oxide films
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Abstract
A detailed systematic study of the tungsten oxide thin films has been carried out using colored WO3 films after they were annealed at progressively increasing temperatures ranging from 350 to 450 degree(s)C in oxygen environments. The structural properties of the films were characterized using x-ray diffraction (XRD) and Raman spectroscopy. The amorphous WO3 films remain as an amorphous phase up to 385 degree(s)C and begin to crystallize at 390 degree(s)C and then are completely crystallized at 450 degree(s)C. Absorption peaks of the films are found to shift to a higher energy side with increasing annealing temperature up to 385 degree(s)C and then shift abruptly to a lower energy as the films begin to crystallize at 390 degree(s)C.
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Esra Ozkan, Se-Hee Lee, C. Ed Tracy, Fatma Tepehan, J. Roland Pitts, Satyen K. Deb, "Optical and electrochromic properties of amorphous and crystalline tungsten oxide films", Proc. SPIE 4458, Solar and Switching Materials, (13 November 2001); doi: 10.1117/12.448250; https://doi.org/10.1117/12.448250
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