Enhanced electrical conductivity of Au–LaNiO<sub>3</sub> nanocomposite thin films by chemical solution deposition

Wang, H. L.; Ning, Xiaojuan; Wang, Z. J.

doi:10.1039/c5ra15152j

Cited by 18 publications

(22 citation statements)

References 31 publications

(30 reference statements)

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“…It is important to note that double‐peak with the higher binding energy (Au 4 f 5/2 ; 87.7 eV) and lower binding energy (Au 4 f 7/2 ; 84.0 eV) in the left of the Figure F have been observed due to the spin‐orbital coupling effect. Both these two core‐level lines are in accord with the values of the pure Au . Hence, EDS and XPS results also clearly evidence that Au as a distinct phase divided with the VO 2 .…”

Section: Resultssupporting

confidence: 73%

Bandwidth controlled metal‐insulator transition in Au–VO₂ nanocomposite thin films

Ning

Chen

et al. 2018

J Am Ceram Soc

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Recognizing and controlling the metal-insulator transition (MIT) in VO 2 transition-metal oxides is interesting for the future electronic devices. However, the effect of the electron correlation for the structure-coupled MIT in VO 2 is as yet an open question. In this study, we present for the first time direct spectroscopic evidence for the charge-transfer assistance bandwidth controlled MIT (BC-MIT) in Au-VO 2 nanocomposite thin films (NCTFs). A significantly enhancement of the MIT temperature (about 350 K) is realized in Au-VO 2 films with Au volume ratio of 1.1 mol%. However, by further increasing Au ratios, the MIT temperature in Au-VO 2 NCTFs is downward shifted by~16 K and forward shifted 6 K. The V L-edge and O K-edge have been investigated. The basic electronic parameters such as the covalency (W) have been tuned. The relationship between bandwidth and the MIT temperature has been clearly elucidated a linear relationship. The experimental results demonstrate that MIT in VO 2 is BC-MIT which improved our understanding of the electron correlation effect in VO 2 systems. K E Y W O R D Sbandwidth, metal-insulator transition, vanadium dioxide

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Section: Resultssupporting

confidence: 73%

Bandwidth controlled metal‐insulator transition in Au–VO₂ nanocomposite thin films

Ning

Chen

et al. 2018

J Am Ceram Soc

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“…Therefore, in the Au–PZO nanocomposite films, there are two phases of the perovskite PZO and the face centered cubic structure of Au, which is exactly the same as the XPS result that Au exists as an elementary substance rather than a compound in the composite films. HAuCl 4 is easily decomposed to form Au NPs when the temperature is above 200°C, thus Au NPs will form before the crystallization of PZO during annealing process. Similar results have been reported in the Au–LaNiO 3 and Au–Pb(ZrTi)O 3 nanocomposite films …”

Section: Resultsmentioning

confidence: 99%

“…HAuCl 4 is easily decomposed to form Au NPs when the temperature is above 200°C, thus Au NPs will form before the crystallization of PZO during annealing process. Similar results have been reported in the Au–LaNiO 3 and Au–Pb(ZrTi)O 3 nanocomposite films …”

Section: Resultsmentioning

confidence: 99%

“…By using a linear intercept method based on the surface micrograph, the average grain size is 724, 461, 135, 122, 103 and 95 nm for the Au–PZO films with 0, 0.5, 1, 2, 5 and 10 mol% Au, respectively. The decrease in the average grain size of perovskite PZO may be due to that Au NPs dispersed in PZO matrix can act as heterogeneous nucleation sites for perovskite PZO, which promotes the nucleation of perovskite PZO during crystallization process . In addition, a large number of relatively large Au particles that segregate at PZO grain boundaries can be observed on the surface of the Au–PZO films with 5 and 10 mol% Au, implying that the relatively large Au particles can hinder the growth of PZO grains in the crystallization process.…”

Section: Resultsmentioning

confidence: 99%

“…Similar results have been reported in the Au-LaNiO 3 and Au-Pb(ZrTi)O 3 nanocomposite films. 17,23 To confirm the shape, size and distribution of Au NPs, the microstructure of the Au-PZO films was studied by TEM. Figure 4 shows cross-sectional images of the Au-PZO films with 0, 1 and 10 mol% Au.…”

Section: Analysis Of Phase and Microstructure In The Au-pzo Composimentioning

confidence: 99%

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Enhancement of energy storage density in antiferroelectric PbZrO₃films via the incorporation of gold nanoparticles

Wang

Bai

et al. 2019

J Am Ceram Soc

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In this work, antiferroelectric Au–PbZrO3 (Au–PZO) nanocomposite thin films were prepared by chemical solution deposition (CSD), and the effects of Au concentration on the antiferroelectric properties and the recoverable energy density were investigated. The results showed that the optimal Au concentration in the Au–PZO nanocomposite thin films was about 1 mol% for structural and electric properties. In the Au–PZO nanocomposite thin films with 1 mol% Au, Au nanoparticles (NPs) were distributed uniformly in the perovskite PZO matrix. Moreover, the recoverable energy density was 10.8 J/cm3 at 600 kV/cm, which is 42% higher than that of the pure PZO films. The results demonstrate that adding an appropriate amount of noble metal NPs in antiferroelectric thin films is an effective method to improve the energy storage properties.

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Configuration of Ce‐doped LaNiO ₃ as an alternative to platinum‐free counter electrodes for dye‐sensitized solar cells

Gunasekaran

James

Maridevaru

et al. 2022

Intl J of Energy Research

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Summary The exorbitant cost, corrosive nature and rare abundance of Pt as counter electrodes has hampered the availability of dye‐sensitized solar cells (DSSCs). Perovskites, the complex metal oxides that have a diverse variety of oxidation states and high oxygen vacancy concentrations, have sparked a lot of interest in energy storage and conversion, with researchers focusing on alternative ideas for rate‐cut counter electrodes to magnify the cost‐cutting of DSSCs. Herein, instead of Pt, the three hydrothermally synthesized perovskites LaCeNiO3, LaNiO3, and CeNiO3 are employed as photocathodes for the fabrication of DSSCs. The electrochemical studies reveal that their electrocatalytic activity towards the iodine/iodide electrolyte is akin to a typical Pt photocathode. The electrons released by the perovskites by oxygen reduction reaction on its surface reduce the I3− to I−, thus the regeneration of the dye to its ground state happens by collecting electrons from the I− ion redox mediator, and finally oxidation of I− to I3− takes place. The LaCeNiO3 shows a higher short circuit current (13.75 mA cm−2) with a power conversion efficiency of 3.46%. It has 579 mV of open‐circuit voltage with a 0.37 fill factor value. The LaNiO3 shows lower values in comparison with LaCeNiO3 because the A‐site cation doping creates lattice deficiencies in LaCeNiO3 making it good for the iodine reduction reaction.

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Enhanced electrical conductivity of Au–LaNiO₃ nanocomposite thin films by chemical solution deposition

Abstract: Au–LaNiO3 (Au–LNO) nanocomposite films with 3.84 at% Au were firstly fabricated by one-step chemical solution deposition (CSD), and their electrical properties were investigated.

Cited by 18 publications

References 31 publications

Bandwidth controlled metal‐insulator transition in Au–VO₂ nanocomposite thin films

Bandwidth controlled metal‐insulator transition in Au–VO₂ nanocomposite thin films

Enhancement of energy storage density in antiferroelectric PbZrO₃films via the incorporation of gold nanoparticles

Configuration of Ce‐doped LaNiO ₃ as an alternative to platinum‐free counter electrodes for dye‐sensitized solar cells

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Enhanced electrical conductivity of Au–LaNiO3 nanocomposite thin films by chemical solution deposition

Abstract: Au–LaNiO3 (Au–LNO) nanocomposite films with 3.84 at% Au were firstly fabricated by one-step chemical solution deposition (CSD), and their electrical properties were investigated.

Cited by 18 publications

References 31 publications

Bandwidth controlled metal‐insulator transition in Au–VO2 nanocomposite thin films

Bandwidth controlled metal‐insulator transition in Au–VO2 nanocomposite thin films

Enhancement of energy storage density in antiferroelectric PbZrO3 films via the incorporation of gold nanoparticles

Configuration of Ce‐doped LaNiO 3 as an alternative to platinum‐free counter electrodes for dye‐sensitized solar cells

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Product

Resources

About

Enhanced electrical conductivity of Au–LaNiO₃ nanocomposite thin films by chemical solution deposition

Bandwidth controlled metal‐insulator transition in Au–VO₂ nanocomposite thin films

Bandwidth controlled metal‐insulator transition in Au–VO₂ nanocomposite thin films

Enhancement of energy storage density in antiferroelectric PbZrO₃films via the incorporation of gold nanoparticles

Configuration of Ce‐doped LaNiO ₃ as an alternative to platinum‐free counter electrodes for dye‐sensitized solar cells