Electrochromic Inorganic Nanostructures with High Chromaticity and Superior Brightness

Gugole, Marika; Olsson, Oliver; Rossi, Stefano; Jonsson, Magnus P.; Dahlin, Andreas

doi:10.1021/acs.nanolett.1c00904

Cited by 47 publications

(78 citation statements)

References 35 publications

(89 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 17 ] Reflectivity spectra were measured under diffuse illumination with a standardized colorimetric tester, [ 13a ] showing high polarization‐independent reflectivity (Figure 1b) and a wide RGB gamut in the CIE xy diagram. For comparison, we also include the color gamut of the latest commercial electronic reader in color [ 6 ] (PocketBook with E‐Ink Kaleido released in 2020), which showed much poorer color quality (Figure 1c). The blue and green metasurfaces provide structural coloration based on a Fabry–Pérot cavity resonance and the plasmonic activity of the dielectric voids inside the gold.…”

Section: Resultsmentioning

confidence: 99%

“…and suffer from poor image quality in color mode, which is achieved by subpixels containing red, green, and blue (RGB) filters. [ 6 ] In addition, the slow switching (≈1 s) prevents video playback and limits the usage to applications such as e‐readers and simple labels. The electrowetting technology appeared as an important electronic paper technology because it provides video speed, [ 7 ] but it remains unavailable commercially.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Video Speed Switching of Plasmonic Structural Colors with High Contrast and Superior Lifetime

et al. 2021

Self Cite

View full text Add to dashboard Cite

Reflective displays or “electronic paper” technologies provide a solution to the high energy consumption of emissive displays by simply utilizing ambient light. However, it has proven challenging to develop electronic paper with competitive image quality and video speed capabilities. Here, the first technology that provides video speed switching of structural colors with high contrast over the whole visible is shown. Importantly, this is achieved with a broadband‐absorbing polarization‐insensitive electrochromic polymer instead of liquid crystals, which makes it possible to maintain high reflectivity. It is shown that promoting electrophoretic ion transport (drift motion) improves the switch speed. In combination with new nanostructures that have high surface curvature, this enables video speed switching (20 ms) at high contrast (50% reflectivity change). A detailed analysis of the optical signal during switching shows that the polaron formation starts to obey first order reaction kinetics in the video speed regime. Additionally, the system still operates at ultralow power consumption during video speed switching (<1 mW cm−2) and has negligible power consumption (<1 µW cm−2) in bistability mode. Finally, the fast switching increases device lifetime to at least 107 cycles, an order of magnitude more than state‐of‐the‐art.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Video Speed Switching of Plasmonic Structural Colors with High Contrast and Superior Lifetime

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…To realize electrochromic displays having 2D CIE color space tunability, the thickness of the asymmetric Fabry–Perot nanocavity‐type thin films must be altered. [ 7–9,17,18 ] However, thickness physical adjustment is impractical for a viable and configurable color display device. Certainly, the current state‐of‐the‐art electrochromic displays are still suffering from the challenge of overcoming the 1D CIE color space tunability.…”

Section: Introductionmentioning

confidence: 99%

“…Although it is reported that using subpixels arranged side by side (i.e., multiple micro electrochromic devices) can attain multicolors (as depicted in Scheme S1a, Supporting Information), [ 19,20 ] it suffers low brightness due to reflective loss. [ 17 ] In addition, the counter electrode for the subpixels arranged side by side should also be divided into small segments to enable every single pixel to be addressed separately. Furthermore, the counter electrode, serving as a charge storage layer, would obstruct a considerable fraction of the incident light and further reduces the brightness of the device.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electrochromic Displays Having Two‐Dimensional CIE Color Space Tunability

Zhang

Elezzabi

2021

Adv Funct Materials

View full text Add to dashboard Cite

Electrochromic devices with a wide color gamut distribution have long been sought after for non-emissive display technologies. The current state-ofthe-art multicolor electrochromic displays utilize a single electrochromic layer, which restricts their color tunability within a linear or curved segment scope in International Commission on Illumination (CIE) color space and thus leads to limited color hues. Herein, it is demonstrated vivid electrochromic displays with broadened color hues via fabricating Zn-based multicolor electrochromic displays having 2D CIE color space tunability. In addition, it is revealed that a Fabry-Perot nanocavity structure can further tune the color hues via altering the coordinate of the 2D CIE color space. It is known that this is the first demonstration of 2D CIE color space tunability realization from a single transparent or reflective electrochromic device. These findings represent a novel strategy for fabricating multicolor electrochromic displays and are expected to advance the development of electrochromic displays.

show abstract

Electrochromic Passive Matrix Display Utilizing Diode‐Like Redox Reactions on Indium‐Tin‐Oxide

Olsson,

Gugole,

Blake

et al. 2024

Adv Eng Mater

Self Cite

View full text Add to dashboard Cite

Recent years have shown many advances in the development of tunable structural colors by combining nanostructures with electrochromic materials. One main goal is to develop energy saving color displays that rely on ambient light instead of being emissive. However, all displays need to be pixelated to show arbitrary images and few studies have addressed the challenge of preparing and controlling individual electrochromic pixels. Here we present a very simple method to reach this milestone by using passive matrix addressing, which requires no additional electronic components in the pixels. It is shown that the common transparent conductor indium tin oxide (ITO) in non‐aqueous electrolytes exhibits the diode‐like behavior (threshold in voltage in relation to current and coloration) necessary to prevent significant cross‐talk between pixels. The chemical nature of the redox activity that enables this behavior is attributed to omnipresent oxygen and the formation of superoxide ions. Additionally, we show that a gel‐like electrolyte can be prepared by optical lithography, which makes the concept compatible with patterning of pixels at high resolution. This method for preparing pixelated displays should be compatible with practically any type of electrochromic surface in both reflective and transmissive configurations. Also, the counter electrode maintains excellent transparency since it simply consists of ITO. Our results should prove very useful as the research field of tunable structural colors moves from proof‐of‐concept to real devices.This article is protected by copyright. All rights reserved.

show abstract

Electrochromic Inorganic Nanostructures with High Chromaticity and Superior Brightness

Cited by 47 publications

References 35 publications

Video Speed Switching of Plasmonic Structural Colors with High Contrast and Superior Lifetime

Video Speed Switching of Plasmonic Structural Colors with High Contrast and Superior Lifetime

Electrochromic Displays Having Two‐Dimensional CIE Color Space Tunability

Electrochromic Passive Matrix Display Utilizing Diode‐Like Redox Reactions on Indium‐Tin‐Oxide

Contact Info

Product

Resources

About