Journal
IEEE ELECTRON DEVICE LETTERS
Volume 36, Issue 3, Pages 256-258Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LED.2015.2397002
Keywords
Electrochromic; AZO/Au/AZO; tungsten oxide; TCO film; smart window
Categories
Funding
- Ministry of Science and Technology [103-2221-E-006-090-MY2, 102-2633-E-168-001]
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This letter presents a novel electrochromic (EC) device based on WO3/aluminum-doped ZnO (AZO)/Au/AZO. The WO3/AZO/Au/AZO films were prepared through simultaneous radio frequency magnetron sputtering (for the WO3 and AZO films) and ion sputtering (for the Au film). The WO3/AZO/Au/AZO structure features high optical modulation and effective infrared suppression that facilitates achieving high performance and low emission in the EC device. At a wavelength of 550 nm, the EC device achieved an optical modulation depth of 80%, which is the difference between the transmittance of the colored state (7.92%) and that of the bleached state (88.74%). The rapid response time of the device was similar to 9.9 s for the colored state and 4.7 s for the bleached state.
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