Electrochromic performances of nonstoichiometric NiO thin films

Moulki, Hakim; Faure, Cyril; Mihelčič, Mohor; Vuk, Angela Šurca; Švegl, F.; Orel, B.; Campet, G.; Alfredsson, Maria; Chadwick, Alan V.; Gianolio, Diego; Rougier, Aline

doi:10.1016/j.tsf.2013.10.154

Cited by 43 publications

(22 citation statements)

References 14 publications

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Section: + Exchange In Ni Oxide: a Critical Assessmentmentioning

confidence: 99%

“…The electrochromism of lithium-containing Ni oxide fi lms has been investigated in numerous studies aimed at elucidating basic optical and electrochemical mechanisms [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33] as well as Anodic electrochromic (EC) oxides are of major interest as counter electrodes for smart window applications owing to their unique optical properties upon charge insertion and extraction. However, performance optimization of such oxides has been hampered by limited understanding of their EC mechanism, particularly in Li + -conducting electrolytes.…”

Section: + Exchange In Ni Oxide: a Critical Assessmentmentioning

confidence: 99%

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Anodic Electrochromism for Energy‐Efficient Windows: Cation/Anion‐Based Surface Processes and Effects of Crystal Facets in Nickel Oxide Thin Films

Wen

Granqvist

Niklasson

2015

Adv Funct Materials

123

102

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Anodic electrochromic (EC) oxides are of major interest as counter electrodes for smart window applications owing to their unique optical properties upon charge insertion and extraction. However, performance optimization of such oxides has been hampered by limited understanding of their EC mechanism, particularly in Li + -conducting electrolytes. This paper reports on NiO x films with 1.16 ≤ x ≤ 1.32, prepared by sputter deposition. These films were immersed in an electrolyte of lithium perchlorate in propylene carbonate, and EC properties were studied by cyclic voltammetry and in situ optical transmittance measurements. The electrochromism was significantly enhanced at large values of x. We find that charge exchange in Ni oxide is mainly due to surface processes and involves both cations and anions from the electrolyte, which is different from the case of cathodic EC materials such as WO 3 .Whereas previous studies of Ni oxide have focused on cation intercalation, the cation/anionbased mechanism presented here offers a new paradigm for designing and developing EC devices such as smart windows for energy efficient buildings.2

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Section: + Exchange In Ni Oxide: a Critical Assessmentmentioning

confidence: 99%

Section: + Exchange In Ni Oxide: a Critical Assessmentmentioning

confidence: 99%

Anodic Electrochromism for Energy‐Efficient Windows: Cation/Anion‐Based Surface Processes and Effects of Crystal Facets in Nickel Oxide Thin Films

Wen

Granqvist

Niklasson

2015

Adv Funct Materials

123

102

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“…This parameter has been defined by equation (10)  D Ψ AB  (10) Where D is the thermal diffusivity and  is the effective absorptivity.…”

Section: ) Opto-thermal Investigationmentioning

confidence: 99%

“…It has been recorded that NiO is a cubic structured [5] with anti-ferromagnetic and electro-chromic properties [6][7][8][9][10]. This material has important properties which are explored for several applications such as smart windows [11], dye sensitized photocathode [12], transparent p-type semi-conductors [13,14], and gas sensors [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Optical, Physical, Chemical and Electrical Properties of Nickel Oxide Sprayed Thin Films under Tin Doping Effects

Amor¹,

Hamzaoui²,

Boukhachem³

et al. 2015

Advances in Ceramic Science and Engineering

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Tin-doped nickel oxide thin films have been successfully prepared by spray pyrolysis technique on glass substrates at 460°C. The effects of tin doping on structural, optical, and electrical properties were investigated. X-ray diffraction pattern reveals that all prepared thin films have cubic structure with (111) preferred orientation. The surface topography of these films was performed by atomic force microscopy. Optical measurements show a high transparency in the visible range around 95%. The optical band gap Eg decreases with Sn content from 3.633 to 3.54 eV. PL measurements show some bands transition which shift irregularly with Sn doping. Finally, the electric conductivity of NiO thin film was investigated through the impedance spectroscopy measurements in the frequency range 5 Hz-13 MHz at various temperatures. These measurements show a thermally activation of the electric. AC conductivity of NiO thin films is investigated through Jonscher law. Also, from these measurements, dielectric parameters were calculated.

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“…Moreover, nanostructured films of NiO present solid-state electroactivity [25][26][27] due to the verification of a series of reversible electrochemical processes that switch the properties of electrical transport [28] and optical absorption [29] of the oxide itself. The optical [10][11][12][13][14]30,31], magnetic [32,33], electrochemical [34], and photoelectrochemical [35,36] properties of NiO (either in the bulk state or in the nanostructured version) are considerably altered when the surface of the oxide is dye-sensitized [37]. Such a type of electrode modification consists mainly in the impartation of additional optical absorption [38][39][40][41][42][43][44][45][46][47][48][49] and photoelectroactivity to NiO in the NIR-Vis range, i.e., in a spectral range of lower energies with 2 of 18 respect to the intrinsic optical absorption of pristine NiO (typically in the near ultraviolet (UV)) [50].…”

Section: Introductionmentioning

confidence: 99%

Effect of Sensitization on the Electrochemical Properties of Nanostructured NiO

et al. 2018

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Screen-printed NiO electrodes were sensitized with 11 different dyes and the respective electrochemical properties were analyzed in a three-electrode cell with the techniques of cyclic voltammetry and electrochemical impedance spectroscopy. The dye sensitizers of NiO were organic molecules of different types (e.g., squaraines, coumarins, and derivatives of triphenyl-amines and erythrosine B), which were previously employed as sensitizers of the same oxide in dye-sensitized solar cells of p-type (p-DSCs). Depending on the nature of the sensitizer, diverse types of interactions occurred between the immobilized sensitizer and the screen-printed NiO electrode at rest and under polarization. The impedance data recorded at open circuit potential were interpreted in terms of two different equivalent circuits, depending on the eventual presence of the dye sensitizer on the mesoporous electrode. The fitting parameter of the charge transfer resistance through the electrode/electrolyte interface varied in accordance to the differences of the passivation action exerted by the various dyes against the electrochemical oxidation of NiO. Moreover, it has been observed that the resistive term R CT associated with the process of dark electron transfer between the dye and NiO substrate is strictly correlated to the overall efficiency of the photoconversion (η) of the corresponding p-DSC, which employs the same dye-sensitized electrode as photocathode.

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Electrochromic performances of nonstoichiometric NiO thin films

Cited by 43 publications

References 14 publications

Anodic Electrochromism for Energy‐Efficient Windows: Cation/Anion‐Based Surface Processes and Effects of Crystal Facets in Nickel Oxide Thin Films

Anodic Electrochromism for Energy‐Efficient Windows: Cation/Anion‐Based Surface Processes and Effects of Crystal Facets in Nickel Oxide Thin Films

Optical, Physical, Chemical and Electrical Properties of Nickel Oxide Sprayed Thin Films under Tin Doping Effects

Effect of Sensitization on the Electrochemical Properties of Nanostructured NiO

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