Electrochromism and Electronic Structures of Nitrogen Doped Tungsten Oxide Thin Films Prepared by RF Reactive Sputtering

Autor:	Noboru Miura, Koichi Nakagawa, Ryotaro Nakano, Setsuko Matsumoto, Hironaga Matsumoto
Rok vydání:	2008
Předmět:	Materials science Physics and Astronomy (miscellaneous) Doping General Engineering General Physics and Astronomy chemistry.chemical_element Electronic structure Photochemistry Nitrogen Tungsten trioxide Amorphous solid chemistry.chemical_compound chemistry Sputtering Electrochromism Thin film
Zdroj:	Japanese Journal of Applied Physics. 47:7230-7235
ISSN:	1347-4065 0021-4922
DOI:	10.1143/jjap.47.7230
Popis:	The doping effect of nitrogen on amorphous tungsten trioxide (a-WO3) thin films was investigated with regard to electrochromism and electronic structures. The N-doped thin films exhibit a change in electrochromic coloration from transparent yellow to black, whereas the un-doped thin films exhibit blue coloration. In addition, a new absorption peak related to nitrogen doping is observed at 2.3 eV in photoabsorption spectra during the electrochemical coloration/bleaching process. To explain these experimental results, the electronic structures of N-doped tungsten oxide were calculated by the DV-Xα molecular orbital method.
Databáze:	OpenAIRE
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