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Rational Design of Oxygen Deficiency-Controlled Tungsten Oxide Electrochromic Films with an Exceptional Memory Effect.

Rational Design of Oxygen Deficiency-Controlled Tungsten Oxide Electrochromic Films with an... Owing to their nonemissive characteristics, electrochromic materials promise distinct advantages in developing next-generation eye-friendly information displays. Yet, it remains a challenge to manipulate the structure of the materials to achieve a strong memory effect with high optical contrast, which is of importance for displaying images with essentially zero energy consumption. Here, we design a mixed crystalline WO x thin film implanted with massive oxygen deficiencies based on a conventional reactive magnetron sputtering process. The obtained WO x film exhibits high dual-band optical modulation in both visible (VIS, 99.0% in 633 nm) and near-infrared (NIR, 94.2% in 1300 nm) regions as well as an exceptional memory effect (the colored transmittance increases only by 0.04% at 633 nm after 50 days). The enhanced electrochromic performance can be attributed to dense Li+-ion binding sites as well as the trapping effect provided by the massive internal oxygen deficiencies. The strategy in this work bestows the WO x thin film a promising candidate for developing electrochromic information displays and other energy-efficient devices as well. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png ACS Applied Materials & Interfaces Pubmed

Rational Design of Oxygen Deficiency-Controlled Tungsten Oxide Electrochromic Films with an Exceptional Memory Effect.

ACS Applied Materials & Interfaces , Volume 12 (29): 8 – Jul 23, 2020

Rational Design of Oxygen Deficiency-Controlled Tungsten Oxide Electrochromic Films with an Exceptional Memory Effect.


Abstract

Owing to their nonemissive characteristics, electrochromic materials promise distinct advantages in developing next-generation eye-friendly information displays. Yet, it remains a challenge to manipulate the structure of the materials to achieve a strong memory effect with high optical contrast, which is of importance for displaying images with essentially zero energy consumption. Here, we design a mixed crystalline WO
x
thin film implanted with massive oxygen deficiencies based on a conventional reactive magnetron sputtering process. The obtained WO
x
film exhibits high dual-band optical modulation in both visible (VIS, 99.0% in 633 nm) and near-infrared (NIR, 94.2% in 1300 nm) regions as well as an exceptional memory effect (the colored transmittance increases only by 0.04% at 633 nm after 50 days). The enhanced electrochromic performance can be attributed to dense Li+-ion binding sites as well as the trapping effect provided by the massive internal oxygen deficiencies. The strategy in this work bestows the WO
x
thin film a promising candidate for developing electrochromic information displays and other energy-efficient devices as well.

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ISSN
1944-8244
eISSN
1944-8252
DOI
10.1021/acsami.0c06786
pmid
32610893

Abstract

Owing to their nonemissive characteristics, electrochromic materials promise distinct advantages in developing next-generation eye-friendly information displays. Yet, it remains a challenge to manipulate the structure of the materials to achieve a strong memory effect with high optical contrast, which is of importance for displaying images with essentially zero energy consumption. Here, we design a mixed crystalline WO x thin film implanted with massive oxygen deficiencies based on a conventional reactive magnetron sputtering process. The obtained WO x film exhibits high dual-band optical modulation in both visible (VIS, 99.0% in 633 nm) and near-infrared (NIR, 94.2% in 1300 nm) regions as well as an exceptional memory effect (the colored transmittance increases only by 0.04% at 633 nm after 50 days). The enhanced electrochromic performance can be attributed to dense Li+-ion binding sites as well as the trapping effect provided by the massive internal oxygen deficiencies. The strategy in this work bestows the WO x thin film a promising candidate for developing electrochromic information displays and other energy-efficient devices as well.

Journal

ACS Applied Materials & InterfacesPubmed

Published: Jul 23, 2020

References