The down-conversion and up-conversion photoluminescence properties of Na0.5Bi0.5TiO3:Yb3+/Pr3+ ceramics

Huang, Yin-Peng; Luo, Laihui; Wang, Jia; Zuo, Qianghui; Yao, Yongjie; Li, Weiping

doi:10.1063/1.4927278

Cited by 46 publications

(4 citation statements)

References 44 publications

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“…In comparison, there are multiple peaks for 9-EA-PCS x in the region of 350–390 nm with a maximum absorption peak at 370 nm, which may be assigned to π–π* transitions centered at anthracene units. To obtain the E g OPT of PCS x and 9-EA-PCS x , the reflectance data were converted to absorbance data using the Kubelka–Munk function (K–M). , As shown in Figure S6, their E g OPT were determined from extrapolation of the absorption edge to the energy axis, and results are listed in Table .…”

Section: Resultsmentioning

confidence: 99%

Realizing High Quantum Yield Blue Emission of Polycarbosilane Modified by Anthracene with Weak Intermolecular Interactions

et al. 2020

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Integration of high quantum yield blue emission and easy film-forming ability in organic emissive materials is challenging. Polycarbosilane (PCS) has received much attention as a model compound owing to its high stability, versatile optical properties, solvability, and film-forming ability; also, anthracene as a star material is the first organic molecule for electroluminescence (EL) devices. Herein, an ingenious strategy was successfully introduced to prepare PCS x with 9-ethylanthracene (referred as 9-EA-PCS x ) by a hydrosilylation reaction using 9-vinylanthracene and PCS as starting materials, which transfer efficient energy from −Si–C– bonds to anthracene units. Grafted 9-ethylanthracene with extended π-conjugation effectively improves optical property, morphological stability, and oxidation and ultraviolet (UV) radiation resistance of PCS. Particularly, 9-EA-PCSh powder displays excellent blue light emission (λmax = 433 nm) with a high quantum yield (up to 80.06%), which is the highest value ever reported for organosilicon polymers to the best of our knowledge. For the first time, such a synergistic effect of PCS with anthracene in this way paves a practical way toward reliable emissive materials capable of forming facile coatings and providing useful low-cost emitting layers in developing foldable organic devices.

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Section: Resultsmentioning

confidence: 99%

Realizing High Quantum Yield Blue Emission of Polycarbosilane Modified by Anthracene with Weak Intermolecular Interactions

et al. 2020

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“…43 The optical absorption of the obtained samples was studied using UV−vis−NIR spectroscopy. By converting reflectance to absorbance data by the Kubelka− Munk function and extending the absorption edge onto the energy axis, 44 as shown in Figure S7 (SI), the band gap energies of pure NiCo 2 O 4 and NiCo 2 O 4 @PANI are determined to be 1.63 and 1.58 eV, respectively, implying the higher conductivity of heterogeneous composites. To further prove the effect of PANI, the influence of PANI on the composition of NiCo 2 O 4 before and after GCD testing was studied through XPS measurements (Figure 7a,b).…”

Section: Resultsmentioning

confidence: 99%

NiCo₂O₄@Polyaniline Nanotubes Heterostructure Anchored on Carbon Textiles with Enhanced Electrochemical Performance for Supercapacitor Application

Pan

Liu

et al. 2019

J. Phys. Chem. C

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NiCo2O4 is one of the most promising supercapacitor electrode materials. However, its capacitance and cycle stability require further improvement for practical application. Herein, a porous NiCo2O4 nanotube array@polyaniline (NiCo2O4@PANI) electrode grown directly on carbon textiles is designed and synthesized through a facile two-step method. Electrochemical tests show that the NiCo2O4@PANI/carbon textiles composite electrode exhibits a higher specific capacity (720.5 C g–1, 10.38 C cm–3 in terms of volumetric capacity) than an electrode of pure NiCo2O4 at a current density of 1 A g–1. Additionally, the PANI layer is also beneficial to prevent the deformation of the tubular NiCo2O4 and to keep 99.64% capacity retention after 10 000 cycles. The prominent electrochemical capacitive properties of the NiCo2O4@PANI electrode are not only attributed to the extra pseudo-capacitance originating from PANI but also the synergistic effects of NiCo2O4 and PANI. Detailed investigation of the electrochemical impedance spectroscopy and UV–vis–NIR spectrophotometry data reveals decreased charge transfer resistance. Further mechanism and dynamics analysis based on cyclic voltammetry (CV) and X-ray photoelectron spectroscopy (XPS) reveals that the composite electrode shows enhanced redox and surface-capacitive behavior because of the coated PANI. This work provides an effective strategy to improve the supercapacitor performance by inducing interactions based on heterostructure, and the prepared NiCo2O4@PANI composite electrode exhibits potential applications in emerging electrochemical energy storage devices.

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“… Specifically, Pr 3+ can be populated to the 3 P 0 level after accepting the transferred excitation energy from Yb 3+ . It should be mentioned that Pr 3+ may also be excited to 3 P 2 through cross-relaxation and thermal excitation and then further relaxed to the 3 P 0 level. − UCL is generated when electrons in the 3 P 0 level return to the ground state of 3 H 4 . After that, analogous results were continually reported in crystals of Gd 3 Ga 5 O 12 , Na 0.5 Bi 0.5 TiO 3 , NaY(WO 4 ) 2 , Y 2 O 3 , BY 2 F 8 , and CaMoO 4 …”

Section: Lanthanide-sensitized Upconversion Luminescencementioning

confidence: 99%

“…331−335 UCL is generated when electrons in the 3 P 0 level return to the ground state of 3 H 4 . After that, analogous results were continually reported in crystals of Gd 3 Ga 5 O 12 , 332 Na 0.5 Bi 0.5 TiO 3 , 333 NaY-(WO 4 ) 2 , 334 Y 2 O 3 , 335 BY 2 F 8 , 336 and CaMoO 4 . 337 3.1.2.4.…”

Section: Yb 3+ -Sensitized Upconversion Luminescencementioning

confidence: 99%

Recent Development in Sensitizers for Lanthanide-Doped Upconversion Luminescence

et al. 2022

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The attractive features of lanthanide-doped upconversion luminescence (UCL), such as high photostability, nonphotobleaching or photoblinking, and large anti-Stokes shift, have shown great potentials in life science, information technology, and energy materials. Therefore, UCL modulation is highly demanded toward expected emission wavelength, lifetime, and relative intensity in order to satisfy stringent requirements raised from a wide variety of areas. Unfortunately, the majority of efforts have been devoted to either simple codoping of multiple activators or variation of hosts, while very little attention has been paid to the critical role that sensitizers have been playing. In fact, different sensitizers possess different excitation wavelengths and different energy transfer pathways (to different activators), which will lead to different UCL features. Thus, rational design of sensitizers shall provide extra opportunities for UCL tuning, particularly from the excitation side. In this review, we specifically focus on advances in sensitizers, including the current status, working mechanisms, design principles, as well as future challenges and endeavor directions.

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The down-conversion and up-conversion photoluminescence properties of Na0.5Bi0.5TiO3:Yb3+/Pr3+ ceramics

Abstract: Articles you may be interested inUpconversion emission in Er-doped and Er/Yb-codoped ferroelectric Na0.5Bi0.5TiO3 and its temperature sensing application

Cited by 46 publications

References 44 publications

Realizing High Quantum Yield Blue Emission of Polycarbosilane Modified by Anthracene with Weak Intermolecular Interactions

Realizing High Quantum Yield Blue Emission of Polycarbosilane Modified by Anthracene with Weak Intermolecular Interactions

NiCo₂O₄@Polyaniline Nanotubes Heterostructure Anchored on Carbon Textiles with Enhanced Electrochemical Performance for Supercapacitor Application

Recent Development in Sensitizers for Lanthanide-Doped Upconversion Luminescence

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The down-conversion and up-conversion photoluminescence properties of Na0.5Bi0.5TiO3:Yb3+/Pr3+ ceramics

Abstract: Articles you may be interested inUpconversion emission in Er-doped and Er/Yb-codoped ferroelectric Na0.5Bi0.5TiO3 and its temperature sensing application

Cited by 46 publications

References 44 publications

Realizing High Quantum Yield Blue Emission of Polycarbosilane Modified by Anthracene with Weak Intermolecular Interactions

Realizing High Quantum Yield Blue Emission of Polycarbosilane Modified by Anthracene with Weak Intermolecular Interactions

NiCo2O4@Polyaniline Nanotubes Heterostructure Anchored on Carbon Textiles with Enhanced Electrochemical Performance for Supercapacitor Application

Recent Development in Sensitizers for Lanthanide-Doped Upconversion Luminescence

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NiCo₂O₄@Polyaniline Nanotubes Heterostructure Anchored on Carbon Textiles with Enhanced Electrochemical Performance for Supercapacitor Application