Photochromic Ceramic: Highly Responsive Photochromic Ceramics for High‐Contrast Rewritable Information Displays (Laser Photonics Rev. 15(4)/2021)

Yang, Zetian; Du, Jiaren; Martin, Lisa I. D. J.; Heggen, David Van der; Poelman, Dirk

doi:10.1002/lpor.202170027

Cited by 12 publications

(20 citation statements)

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“…It is noted that the intensity of the isotropic signal is significantly enhanced after irradiation, suggesting that the content of single‐ionized oxygen vacancies is promoted via the external light to irradiate the prepared ceramics. [ 3–58 ] These XPS and EPR results demonstrate that the oxygen vacancies plays an important part during the PC reaction of Na 0.5+ x Bi 2.5+ x Nb 2 O 9 :Er,Pr ceramics. O vacancies are inevitably created because of the Na + and Bi 3+ volatilization during the high‐temperature sintering.…”

Section: Resultsmentioning

confidence: 80%

“…Although encoding patterns or characters have been achieved in PC materials, long light irradiation time is usually required for these ceramics because of their long response time or low coloration contrast. [15,17,[63][64][65] Therefore, it is a challenge to develop inorganic materials with both fast response time and evident coloration contrast to realize hand-writable information display. In this study, the fast response time and the high ΔRef and associated high ΔR t values of the present ceramics show prominent advantages compared with those of the typical inorganic PC materials.…”

Section: Applicationsmentioning

confidence: 99%

“…have optimized the PC coloration contrast and response time in K 0.5 Na 0.5 NbO 3 ceramics by doping Eu 3+ ion via inducing deep defect levels. [ 28 ] Zhang et al. have found O 2 atmosphere sintering favors the PC performances in Na 0.5 Bi 2.5 Nb 2 O 9 .…”

Section: Introductionmentioning

confidence: 99%

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The Enhancement of Photochromism and Luminescence Modulation Properties of Ferroelectric Ceramics via Chemical and Physical Strategies

Gong

et al. 2022

Laser & Photonics Reviews

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Photochromic (PC) materials can be widely applied in light-driven devices such as optical antifake labels, optical switches, information storage. Herein, Er 3+ and Pr 3+ co-doped Na 0.5+x Bi 2.5+x Nb 2 O 9 (x = −0.02, 0, 0.02) ferroelectric ceramics with excellent PC and luminescence modulation properties have been successfully prepared. Both chemical and physical strategies, namely excess Na + and Bi 3+ content during weighing of raw materials and an electric field poling, have been developed to enhance the PC and luminescence modulation. The largest reflectance difference 𝚫Ref between fresh and irradiated ceramics reaches a high value of 36% at x = 0.02, which is much higher than the usually obtained value in inorganic oxide ferroelectrics. Additionally, this value increases to 39% after an electric field poling. Accordingly, the up-conversion luminescence modulation 𝚫R t reaches a high value of 91.6%. The mechanisms of enhanced PC reaction and luminescence modulation via an electrical poling are discussed. Furthermore, a fast response time of around 1 s for PC reaction is achieved in this material. Utilizing this advantage, a hand-rewritable display using the prepared ceramics has been achieved besides the applications in anti-counterfeiting.

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Section: Resultsmentioning

confidence: 80%

Section: Applicationsmentioning

confidence: 99%

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The Enhancement of Photochromism and Luminescence Modulation Properties of Ferroelectric Ceramics via Chemical and Physical Strategies

Gong

et al. 2022

Laser & Photonics Reviews

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“…Thus, the reason for photochromic materials to change color is the existence of electron traps in the microstructure of materials. The existing photochromic materials are mainly divided into inorganic photochromic materials [ 25–27 ] and the organic photochromic materials. [ 28,29 ] However, the application of organic photochromic materials is limited due to their slow reaction speed, easy ageing, short duration, poor thermal stability, etc.…”

Section: Introductionmentioning

confidence: 99%

Preparation, Photochromism, and Luminescence Principle of BMS: Dy³⁺, Eu³⁺ Ceramics

Wang

Zhang

2022

Crystal Research and Technology

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A series of barium magnesium silicate (BaMgSiO 4 ) compounds 1-6 are synthesized successfully, which show property of down conversion fluorescent materials. The photochromic properties and fluorescence intensity of these materials depend on the relative content of Eu and Dy. The photoluminescence excitation spectroscopy spectrum of 4 shows that the emission spectrum has a broad band at 396 nm, which is the maximum excitation wavelength. At the wavelength of 396 nm, The photoluminescence (PL) spectra of 3 and 4 show a broad emission peak at 476 and 610 nm, respectively. 3 and 4 show blue-green fluorescence under UV irradiation, while the luminescent intensity of 3 is slightly higher than 4. The X-ray photoelectron spectra of 3 show Dy 3+ and Eu 3+ , while the electron paramagnetic resonance spectra of 3 and 4 show oxygen vacancies.Research data are not shared.

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“…WO 3 has been regarded as a promising n‐type semiconducting material, with band gap ranging from 2.4 and 2.8 eV and showing strong absorption in the visible region [35] . It is also found to be a semiconductor with remarkable photocatalytic applications owing to its some intrinsic properties [11,36,37] . Also, the high oxidation potential of the valence band of WO 3 makes it capable to oxidize H 2 O and −OH groups to obtain HO ⋅ .…”

Section: Introductionmentioning

confidence: 99%

Efficient ZnCr LDH/monoclinic‐WO₃ composites for Degradation of Tetracycline under Visible Light

2022

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Recently, efficient removal of antibiotics like Tetracycline (TC) from wastewater is emerging as a crucial problem. However, low adsorption capacity and high cost of photocatalysts limit their utility. In this context, monoclinic tungsten trioxide (WO3) loaded ZnCr layered double hydroxide (LDH) composites (ZnCr‐xWO3 x=10 and 20 %) are prepared by co‐precipitation method and characterized by several techniques viz. X‐Ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Raman, Photoluminescence (PL), Field‐Emission Scanning Electron Microscopy (FE‐SEM), Brunauer Emmett Teller (BET), Diffuse Reflectance Spectroscopy (DRS) and Dynamic Light Scattering (DLS). The XRD pattern confirms the formation of ZnCr LDH and its composites with monoclinic‐WO3. Bond vibrations and phase transitions were explored with the help of FTIR and Raman spectra. The BET analysis for ZnCr LDH and ZnCr‐10WO3 composite shows surface area as 27.439 m2/g and 47.691 m2/g. The higher photocatalytic performance of the composites formed is due to enhanced specific surface area and better separation efficiency of photo‐generated electrons and holes through conventional class II hetero junction between ZnCr LDH and monoclinic‐WO3. The kinetics studies performed shows better fit for pseudo first order reaction with maximum degradation efficiency and rate constant for ZnCr‐10WO3 (i. e., 86.7 % and 1.5×10−2 min−1).

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Photochromic Ceramic: Highly Responsive Photochromic Ceramics for High‐Contrast Rewritable Information Displays (Laser Photonics Rev. 15(4)/2021)

Cited by 12 publications

References 0 publications

The Enhancement of Photochromism and Luminescence Modulation Properties of Ferroelectric Ceramics via Chemical and Physical Strategies

The Enhancement of Photochromism and Luminescence Modulation Properties of Ferroelectric Ceramics via Chemical and Physical Strategies

Preparation, Photochromism, and Luminescence Principle of BMS: Dy³⁺, Eu³⁺ Ceramics

Efficient ZnCr LDH/monoclinic‐WO₃ composites for Degradation of Tetracycline under Visible Light

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Photochromic Ceramic: Highly Responsive Photochromic Ceramics for High‐Contrast Rewritable Information Displays (Laser Photonics Rev. 15(4)/2021)

Cited by 12 publications

References 0 publications

The Enhancement of Photochromism and Luminescence Modulation Properties of Ferroelectric Ceramics via Chemical and Physical Strategies

The Enhancement of Photochromism and Luminescence Modulation Properties of Ferroelectric Ceramics via Chemical and Physical Strategies

Preparation, Photochromism, and Luminescence Principle of BMS: Dy3+, Eu3+ Ceramics

Efficient ZnCr LDH/monoclinic‐WO3 composites for Degradation of Tetracycline under Visible Light

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Product

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Preparation, Photochromism, and Luminescence Principle of BMS: Dy³⁺, Eu³⁺ Ceramics

Efficient ZnCr LDH/monoclinic‐WO₃ composites for Degradation of Tetracycline under Visible Light