Characterization of infrared transmittance in mixed transition metal oxides for solar cells application

Tsai, Shih Chang; Ni, Chuen-Fa; Fung, Kuan‐Zong

doi:10.1016/j.ceramint.2017.05.309

Cited by 13 publications

(4 citation statements)

References 24 publications

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“…[11] Although spinel NiCo 2 O 4 with varied metal valence states can be readily synthesized through low-temperature heat treatment, the phase transformation from spinel NiCo 2 O 4 to rock-salt NiCoO 2 is expected at elevated temperatures. [12] Due to the propensity for particle aggregation and structural non-uniformity at high temperature, conducting a comparative analysis of the dependence of photocatalytic CO 2 reduction performance on the Ni-Co oxide polymorphs becomes challenging. Hence, discovering an effective strategy for achieving precise phase modulation under mild conditions, without the need for high temperatures, is highly desirable but remains rarely available so far.…”

Section: Introductionmentioning

confidence: 99%

“…For instance, the topotactic transition of Ni‐Co carbonate hydroxide to NiCo 2 O 4 occurs during the thermal decomposition as a result of the loss of H 2 O and CO 2 , which brings about a more than 20‐fold‐enhanced catalytic yield for the CO 2 photoconversion reaction when compared to the non‐cocatalyst system [11] . Although spinel NiCo 2 O 4 with varied metal valence states can be readily synthesized through low‐temperature heat treatment, the phase transformation from spinel NiCo 2 O 4 to rock‐salt NiCoO 2 is expected at elevated temperatures [12] . Due to the propensity for particle aggregation and structural non‐uniformity at high temperature, conducting a comparative analysis of the dependence of photocatalytic CO 2 reduction performance on the Ni‐Co oxide polymorphs becomes challenging.…”

Section: Introductionmentioning

confidence: 99%

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Enhancing Photocatalytic CO₂ Conversion through Oxygen‐Vacancy‐Mediated Topological Phase Transition

Yang,

Guo,

et al. 2024

Angewandte Chemie

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Weak adsorption of gas reactants and strong binding of intermediates present a significant challenge for most transition metal oxides, particularly in the realm of CO2 photoreduction. Herein, we demonstrate that the adsorption can be fine‐tuned by phase engineering of oxide catalysts. An oxygen vacancy mediated topological phase transition in Ni‐Co oxide nanowires, supported on a hierarchical graphene aerogel (GA), is observed from a spinel phase to a rock‐salt phase. Such in‐situ phase transition empowers the Ni‐Co oxide catalyst with a strong internal electric field and the attainment of abundant oxygen vacancies. Among a series of catalysts, the in‐situ transformed spinel/rock‐salt heterojunction supported on GA stands out for an exceptional photocatalytic CO2 reduction activity and selectivity, yielding an impressive CO production rate of 12.5 mmol g‐1h‐1 and high selectivity of 96.5%. This remarkable performance is a result of the robust interfacial coupling between two topological phases that optimizes the electronic structures through directional charge transfer across interfaces. The phase transition process induces more Co2+ in octahedral site, which can effectively enhance the Co‐O covalency. This synergistic effect balances the surface activation of CO2 molecules and desorption of reaction intermediates, thereby lowering the energetic barrier of the rate‐limiting step.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancing Photocatalytic CO₂ Conversion through Oxygen‐Vacancy‐Mediated Topological Phase Transition

Yang,

Guo,

et al. 2024

Angewandte Chemie

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“…Therefore these materials permeate several fields, for example, catalytic processes, data storage, and sensors [1][2][3]. Among the nanostructure materials, simple and mixed metal oxides draw attention in several fields due to their special properties as excellent chemical stability and mechanical hardness [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Exploring the optical and electrical characteristics of CuO/CuCo2O4 composites

2022

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Series of CuO/CuCo2O4 composites were prepared by using the combustion method followed by heating at 750oC with different molar ratios of Cu/Co. Characterization of different composites is systematically investigated with various analytical techniques. X-ray diffraction patterns and Fourier-transform infrared spectroscopy indicate the growth of well crystalline CuCo2O4 nanoparticles with a cubic spinel structure. Images of transmission electron microscope and scanning electron microscope show a uniform particle distribution. From UV-visible spectra, the calculated optical band gaps of various solids were ranged between 1.2 and 1.8 eV. Electrical properties were measured at temperature ranged from 303 to 463 K in a frequency range from 102 to 106 Hz. The AC conductivity satisfied the Jonscher equation, especially at high frequency. The obtained data of conductivity and dielectric constant indicated that the prepared samples behave as semiconductor materials. Finally, it can be concluded that the CuO/CuCo2O4 composite showed attractive multi-functional features for electrical applications.

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“…Tungsten oxides (WO x ) are well known for their electrochromic properties which have found widespread applications in optoelectronic devices and “smart-window” technology. , Tungsten oxide has also been used in other applications such as photovoltaics, catalysis, and gas sensors . The combination of numerous stoichiometries and morphologies broadens the range of applications of the material.…”

Section: Introductionmentioning

confidence: 99%

Growth of WO_x from Tungsten(VI) Oxo-Fluoroalkoxide Complexes with Partially Fluorinated β-Diketonate/β-Ketoesterate Ligands: Comparison of Chemical Vapor Deposition to Aerosol-Assisted CVD

Bock

et al. 2019

ACS Appl. Mater. Interfaces

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Tungsten(VI) oxo complexes of the type WO(OR)3L [R = C(CH3)2CF3, C(CF3)2CH3, CH(CF3)2, L = hexafluoroacetylacetonate (hfac), ethyl trifluoroacetoacetonate (etfac), acetylacetonate (acac)] bearing partially fluorinated alkoxide and/or chelating ligands were synthesized. Thermal decomposition behavior and mass spectrometry (MS) fragmentation patterns of selected examples were studied. The thermolysis products of WO(OC(CF3)2CH3)3(hfac) were characterized by nuclear magnetic resonance and gas chromatography–MS. Studies of the sublimation behavior of the complexes demonstrated that their volatility depends on the degree of fluorination. Comparative studies of the deposition of tungsten oxide by chemical vapor deposition (CVD) and aerosol-assisted CVD were carried out using WO(OC(CF3)2CH3)3(hfac) as a single-source precursor. WO x materials were successfully deposited by both deposition methods, but the deposits differed in morphology, structure, and crystallinity.

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Characterization of infrared transmittance in mixed transition metal oxides for solar cells application

Cited by 13 publications

References 24 publications

Enhancing Photocatalytic CO₂ Conversion through Oxygen‐Vacancy‐Mediated Topological Phase Transition

Enhancing Photocatalytic CO₂ Conversion through Oxygen‐Vacancy‐Mediated Topological Phase Transition

Exploring the optical and electrical characteristics of CuO/CuCo2O4 composites

Growth of WO_x from Tungsten(VI) Oxo-Fluoroalkoxide Complexes with Partially Fluorinated β-Diketonate/β-Ketoesterate Ligands: Comparison of Chemical Vapor Deposition to Aerosol-Assisted CVD

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Characterization of infrared transmittance in mixed transition metal oxides for solar cells application

Cited by 13 publications

References 24 publications

Enhancing Photocatalytic CO2 Conversion through Oxygen‐Vacancy‐Mediated Topological Phase Transition

Enhancing Photocatalytic CO2 Conversion through Oxygen‐Vacancy‐Mediated Topological Phase Transition

Exploring the optical and electrical characteristics of CuO/CuCo2O4 composites

Growth of WOx from Tungsten(VI) Oxo-Fluoroalkoxide Complexes with Partially Fluorinated β-Diketonate/β-Ketoesterate Ligands: Comparison of Chemical Vapor Deposition to Aerosol-Assisted CVD

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Enhancing Photocatalytic CO₂ Conversion through Oxygen‐Vacancy‐Mediated Topological Phase Transition

Enhancing Photocatalytic CO₂ Conversion through Oxygen‐Vacancy‐Mediated Topological Phase Transition

Growth of WO_x from Tungsten(VI) Oxo-Fluoroalkoxide Complexes with Partially Fluorinated β-Diketonate/β-Ketoesterate Ligands: Comparison of Chemical Vapor Deposition to Aerosol-Assisted CVD