DOI: 10.1063/1.90277. Electrochromism in anodic iridium oxide films

Electrochromism in anodic iridium oxide films

10.1063/1.90277

Crossref journal-article

AIP Publishing

Applied Physics Letters (317)

Abstract

The oxidation state of iridium ions in an oxide film grown electrochemically on an Ir metal reflector electrode in aqueous 0.5M H2SO4 electrolyte can be rapidly and reversibly modulated by voltage pulses of 1 V amplitude according to the reaction: Ir(OH)n(transparent) ⇄IrOx(OH)n−x(colored)+xH++xe. This valency interconversion produces a marked change in light absorption throughout the visible wavelength region and occurs without change in film thickness. Color-bleach cycles exhibit reflectance contrast changes, ΔR/R, and charging times, τ, suitable for electrochromic display devices, e.g., for a film 700 Å thick: ΔR/R=60% at λ=546 nm and τ≈40 msec. The fast write-erase times are made possible by the highly porous and hydrated nature of the oxide film. The charge (∼20 mC cm−2) and energy (∼20 mJ cm−2) are comparable with those for other electrochromic oxide systems, e.g., the tungsten bronzes. Advantages of the iridium oxide system include: (i) fast response; (ii) stability of the colored written state in the presence of water and dissolved O2; (iii) broad spectral absorption; and (iv) the ability to grow and reform the oxide layer insitu in the electro-optic display cell. Electrochromic spectra of anodic iridium oxide films are illustrated and related to charge-transfer and intervalency transitions.

Bibliography

Gottesfeld, S., McIntyre, J. D. E., Beni, G., & Shay, J. L. (1978). Electrochromism in anodic iridium oxide films. Applied Physics Letters, 33(2), 208â210.

Authors 4

S. Gottesfeld (first)
J. D. E. McIntyre (additional)
G. Beni (additional)
J. L. Shay (additional)

References 17 Referenced 146

{'key': '2024020510391325100_r1', 'first-page': '177', 'volume': '36', 'year': '1975', 'journal-title': 'RCA Rev.'} / RCA Rev. (1975)
10.1016/0040-6090(76)90283-2 / Thin Solid Films (1976)
10.1149/1.2132870 / J. Electrochem. Soc. (1976)
{'key': '2024020510391325100_r4', 'first-page': '174', 'volume': '3', 'year': '1977', 'journal-title': 'Pis’ma Zh. Tekh. Fiz.'} / Pis’ma Zh. Tekh. Fiz. (1977)
{'key': '2024020510391325100_r5', 'first-page': '54', 'volume': '43', 'year': '1974', 'journal-title': 'Oyo Butsuri'} / Oyo Butsuri (1974)
10.1016/S0022-0728(74)80431-6 / J. Electroanal. Chem. (1974)
10.1039/f19757101447 / J. Chem. Soc. Faraday Trans. I (1975)
{'key': '2024020510391325100_r8'}
10.1016/S0022-0728(77)80234-9 / J. Electroanal. Chem. (1977)
10.1016/S0022-0728(78)80358-1 / J. Electroanal. Chem. (1978)
{'key': '2024020510391325100_r11'}
10.1039/DC9735600122 / Jr. Faraday Disc. Chem. Soc. (1973)
{'key': '2024020510391325100_r13'}
10.1063/1.88464 / Appl. Phys. Lett. (1975)
10.1063/1.88653 / Appl. Phys. Lett. (1976)
10.1021/ic50092a023 / Inorg. Chem. (1970)
10.1103/PhysRevB.1.1494 / Phys. Rev. B (1970)

Dates

Type	When
Created	22 years, 6 months ago (Feb. 13, 2003, 3:32 p.m.)
Deposited	1 year, 6 months ago (Feb. 5, 2024, 5:39 a.m.)
Indexed	2 months ago (June 23, 2025, 8:46 a.m.)
Issued	47 years, 1 month ago (July 15, 1978)
Published	47 years, 1 month ago (July 15, 1978)
Published Print	47 years, 1 month ago (July 15, 1978)

Funders 0

None

BibTeX

@article{Gottesfeld_1978, title={Electrochromism in anodic iridium oxide films}, volume={33}, ISSN={1077-3118}, url={http://dx.doi.org/10.1063/1.90277}, DOI={10.1063/1.90277}, number={2}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Gottesfeld, S. and McIntyre, J. D. E. and Beni, G. and Shay, J. L.}, year={1978}, month=jul, pages={208–210} }

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