Cycling Durability of Electrochromic W-Ti Oxide Thin Films: Optical Transmittance Data Signal Dual Degradation Modes

Sorar, Idris; Granqvist, Claes G.; Niklasson, Gunnar A.

doi:10.1149/1945-7111/ab6dd6

Cited by 6 publications

(3 citation statements)

References 24 publications

(37 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We observe an almost unchanged bleached‐state transmittance ( T b ) and an increasing colored‐state transmittance ( T c ). Assuming that T c follows Beer's law, i. e. that the optical absorption coefficient is proportional to the logarithm of the transmittance, the evolution of T c can be analyzed by an extension of the power‐law expression in Equation [29]

true - l n ([], T_{c}, (x)) = A_{c 2} + \frac{A_{c 1} - A_{c 2}}{{1 + (\frac{x}{x_{c}})}^{p_{c}}}

…”

Section: Resultsmentioning

confidence: 99%

Cation‐/Anion‐Based Physicochemical Mechanisms for Anodically Coloring Electrochromic Nickel Oxide Thin Films

Wang

Chen

et al. 2022

ChemElectroChem

Self Cite

View full text Add to dashboard Cite

The rapidly expanding field of intelligent ion-based devices has increased interest in the use of anodically-coloring electrochromic nickel oxide thin films. The degradation and coloration mechanisms of nickel oxide, especially in Li + -based electrolytes, are yet to be well understood. Herein we demonstrate that high potentials have a positive effect on the electrochromic performance of nickel oxide thin films. Our studies show that Cl À ions involved in the electrochromic process have been accumulated on the surface of the films upon extended electrochemical cycling, as confirmed by the X-ray Photoelectron Spectroscopy. X-ray Absorption Spectroscopy results indicate that the for-mation of NiÀ Cl bonds influence the structural distortion and that the hybridization between Ni 3d and O 2p orbitals has been enhanced. Density functional theory calculations provide further insights for the band structures and how they change when Li + and Cl À are adsorbed. Our results have revealed the underlying physical and chemical origins associated with the coloration mechanism and the degradation of nickel oxide thin films and highlighted the key role of Cl À . These new understandings will advance the development of superior electrochromic materials and the designing of efficient and durable electrochromic devices, both experimentally and theoretically.

show abstract

true - l n ([], T_{c}, (x)) = A_{c 2} + \frac{A_{c 1} - A_{c 2}}{{1 + (\frac{x}{x_{c}})}^{p_{c}}}

…”

Section: Resultsmentioning

confidence: 99%

Cation‐/Anion‐Based Physicochemical Mechanisms for Anodically Coloring Electrochromic Nickel Oxide Thin Films

Wang

Chen

et al. 2022

ChemElectroChem

Self Cite

View full text Add to dashboard Cite

show abstract

“…Long-term durability is obviously required for EC glazing and is a multifaceted property [37]. Traditionally, durability has been studied empirically for full EC devices [37,38], but more recently it has been realized that individual EC films based on W oxide and Ni oxide, typically immersed in Li + ion conducting liquid electrolytes, can be rendered more durable by certain admixtures (for example by Ti in W-based oxides [39][40][41][42][43][44] or Ir in Ni oxide [45]), that films with degraded EC performance (due to Li trapping [46,47]) can be rejuvenated by potentiostatic or galvanostatic posttreatment [48][49][50][51][52][53], that interfacial interlayers (made by potential pretreatment [54][55][56] or by self-assembly [57]) can enhance the durability and, furthermore, progress has been made towards life-time prediction [43,44,58,59]. All of this work on individual EC films has used liquid electrolytes, typically lithium perchlorate (LiClO4) in propylene carbonate (PC), which was suitable for exploratory studies but obviously falls short of applicability in real-life EC glazing.…”

Section: Introductionmentioning

confidence: 99%

Potentiostatic rejuvenation of electrochromic WO3 thin films: Exploring the effect of polyethylene oxide in LiClO4-Propylene carbonate electrolytes

Sorar

Pehlivan

Bohlin

et al. 2020

Solar Energy Materials and Solar Cells

Self Cite

View full text Add to dashboard Cite

“…Many existing chemical systems are intrinsically electrochromic, such as inorganic compounds, transition metal oxides, or organic molecules. [1][2][3][4] Conjugated organic polymers prove very attractive in the fast-growing electrochromic materials since they combine mechanical flexibility, ease in color-tuning, low-cost scalability, and processing. 5 Organic polymers based on phenothiazines, a class of heterocyclic organic compounds, are often used to obtain modified electrodes in a simple form on several types of substrates.…”

mentioning

confidence: 99%

Electrochromic Performances of Poly(Azure A) Films from Digital Video-Electrochemistry (DVEC)

Guillén

Agrisuelas

Garcı́a-Jareño

et al. 2020

J. Electrochem. Soc.

View full text Add to dashboard Cite

Poly(Azure A) (PAA) films doped with sodium dodecyl sulfate (SDS) were grown on transparent indium tin oxide (ITO) glass substrates by cyclic voltammetry. The electrochromism of PAA was investigated by digital video-electrochemistry (DVEC). DVEC consists of the acquisition of sequential digital images during the electro-stimulated changes of PAA color. The evolution of red, green, and blue (R, G, B) colors intensity (I) of analyzed pixels provides enough sensitivity to detect changes of some nmol cm −2 of electroactive centers. Besides, the different time evolution of these color intensities can serve to discern among different electroactive centers activated in the polymer. For the first time, contrast, coloration efficiency, and bleaching times of PAA are calculated by DVEC. The coloration efficiencies were between 15-25 cm 2 mC −1 with short response times for the bleaching process between 2.9 and 5.5 s. PAA has good electrochromic performances to be used in electrochromic devices. Our present work provides an important insight into the design principles for a practical application of DVEC to characterize electrochromic devices in light-controlled conditions allowing us to find the best performances of these materials.

show abstract

Cycling Durability of Electrochromic W-Ti Oxide Thin Films: Optical Transmittance Data Signal Dual Degradation Modes

Abstract: This paper has been peer-reviewed but does not include the final publisher proof-corrections or journal pagination.

Cited by 6 publications

References 24 publications

Cation‐/Anion‐Based Physicochemical Mechanisms for Anodically Coloring Electrochromic Nickel Oxide Thin Films

Cation‐/Anion‐Based Physicochemical Mechanisms for Anodically Coloring Electrochromic Nickel Oxide Thin Films

Potentiostatic rejuvenation of electrochromic WO3 thin films: Exploring the effect of polyethylene oxide in LiClO4-Propylene carbonate electrolytes

Electrochromic Performances of Poly(Azure A) Films from Digital Video-Electrochemistry (DVEC)

Contact Info

Product

Resources

About