Performance enhancement of white LED with TAG-Al2O3:Ce eutectic phosphor by partial Gd ion substitution

Deng, Chenguang; He, Chao; Sai, Qinglin; Liu, Youwen; Xia, Changtai; Gu, Xiaokun

doi:10.1016/j.ijleo.2018.01.093

Cited by 15 publications

(3 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The maximum S values of ~0.0089/K (for x = 0.005) and ~0.0096/K (for x = 0.01) are obtained at ~540 K. For comparison, the optical temperature sensing properties of the RE 3+ ‐doped materials, including ceramics, glasses, phosphors, and nanophosphors, are demonstrated in Figure . It is noteworthy that the x Ho‐KNNST transparent ceramics (especially x = 0.01) own rather high value of sensitivity, which is higher than other RE 3+ ‐doped ferroelectric ceramics and most of other RE 3+ ‐doped/codoped nonferroelectric materials, exhibiting great potential in the field of FIR‐based optical temperature sensors. The high optical transmittances, easy‐modulated up‐conversion PL, and outstanding optical temperature sensitivity enable the x Ho‐KNNST transparent ceramics to be superior multifunctional materials.…”

Section: Resultsmentioning

confidence: 97%

Outstanding optical temperature sensitivity and dual‐mode temperature‐dependent photoluminescence in Ho³⁺‐doped (K,Na)NbO₃–SrTiO₃ transparent ceramics

Lin

et al. 2019

J Am Ceram Soc

View full text Add to dashboard Cite

High optical temperature sensing properties based on rare-earth-doped (K,Na) NbO 3 -based ferro-/piezoelectrics have attracted much attention due to their potential application in novel optoelectronic devices. Here, we fabricated Ho 3+ -doped (K 0.5 Na 0.5 )NbO 3 -SrTiO 3 transparent ceramics by conventional pressureless sintering. Their microstructures, transmittances, up-conversion photoluminescence, and optical temperature sensing properties have been characterized in details. Because of the cubic-like phase, dense, and fine-grained structure as well as relaxor-like feature, the ceramics exhibit high transmittance (~70%) in the near-infrared region. Owing to Ho 3+ , green and red up-conversion emissions have been observed, which can be easily modulated by temperature. The ceramics have stable emission colors (<200°C) and superior temperature-modulating emission color-tunable performance (>200°C). Furthermore, the temperature sensing behavior based on the thermally coupled levels ( 5 F 4 , 5 S 2 ) of Ho 3+ has been analyzed by a fluorescence intensity ratio technique. The transparent ceramics possess outstanding optical temperature sensitivity (~0.0096/K at 550 K), higher than most rare-earth-doped materials (e.g.

show abstract

Section: Resultsmentioning

confidence: 97%

Outstanding optical temperature sensitivity and dual‐mode temperature‐dependent photoluminescence in Ho³⁺‐doped (K,Na)NbO₃–SrTiO₃ transparent ceramics

Lin

et al. 2019

J Am Ceram Soc

View full text Add to dashboard Cite

show abstract

“…Optoelectronic multifunctional materials that own two or more properties in a single entity have emerged as promising next-generation materials for the development of digitization, integration, and miniaturized equipment . Recently, rare-earth ions RE 3+ (e.g., Pr 3+ , Er 3+ , Ho 3+ , La 3+ , Eu 3+ )-modified ferroelectrics, one kind of multifunctional optoelectronic materials possessing both photoluminescence (PL) and ferroelectric properties, have been intensively investigated for the application of power generation, data storage, optical telecommunication, and remote sensing. − Among RE 3+ , Er 3+ is an important activator in upconversion luminescence materials, which are attractive in upconversion lasers, planar waveguide, and bioseparation. , Er-doped ferroelectrics have been verified to be a promising candidate for realizing multifunction; for instance, Er-doped CaBi 4 Ti 4 O 15 and Er-doped (K, Na)NbO 3 ceramics exhibit bright upconversion emission and superior piezoelectric/ferroelectric properties. , …”

Section: Introductionmentioning

confidence: 99%

Boosting Upconversion Photoluminescence and Multielectrical Properties via Er-Doping-Modulated Vacancy Control in Ba_0.85Ca_0.15Ti_0.9Zr_0.1O₃

Liu

Wang

et al. 2019

ACS Omega

View full text Add to dashboard Cite

The lead-free 0.5(Ba 0.7 Ca 0.3 )TiO 3 –0.5Ba(Ti 0.8 Zr 0.2 )O 3 (BCTZ) ceramics with Er doping have shown good upconversion photoluminescence (PL) and desirable optical temperature sensing properties. To bridge a relationship between the structure/intrinsic defects and properties of rare-earth-doped ferroelectrics, we designed and fabricated a series of BCTZ ceramics doped with 1 mol % Er 3+ by combining the first-principles calculations and experimental measurements. Theoretically, we discovered that Er can occupy both A sites (i.e., replacing Ba or Ca) and B sites (i.e., replacing Ti or Zr) in the BCTZ lattice and highlighted that the Er-doping-induced vacancy concentration decreases for both the oxygen vacancies ( V o ) and cation vacancies ( V c ). Experimentally, the enhanced PL performance and the dielectric, ferroelectric, and piezoelectric properties of the Er-doped BCTZ ceramics have been observed. Finally, the physical origin of Er-induced property enhancement in BCTZ has been elaborated according to the charge density and chemical bonding analysis. These results open up a path to investigate the effects of site substitution and vacancies on optoelectronic properties of multifunctional rare-earth-doped ferroelectrics.

show abstract

“…In the current era, people demand increasingly information and storage technologies . In order to meet the requirements of faster information transmission, more accurate information storage and greater storage capacity, people need to develop new information storage technology.…”

Section: Introductionmentioning

confidence: 99%

Hf⁴⁺ Ion Concentration Dependence of Holographic Storage Properties in Hf:Fe:Cu:LiNbO₃ Crystals

Dai

Han

Shao

et al. 2018

Crystal Research and Technology

View full text Add to dashboard Cite

A series of Hf:Fe:Cu:LiNbO3 crystal with various concentrations of Hf 4+ ion doping are grown in air by the conventional Czochralski technique. The segregation coefficients of the Hf 4+, Fe3+, and Cu2+ ions in the crystals are carried out with an inductively coupled plasma‐atomic emission spectrometer. The birefringence gradient method is measured in order to analyze the optical homogeneity of Hf:Fe:Cu:LiNbO3 crystals. The holographic storage properties of Hf:Fe:Cu:LiNbO3 crystals are investigated by the two‐wavelength coupling experiment. The result shows that the writing time constant shortens from 529.3 to 214.4 s, and the dynamic range increases from 1.12 to 8.07 with increasing Hf 4+ content in the Hf:Fe:Cu:LiNbO3 crystals.

show abstract

Performance enhancement of white LED with TAG-Al2O3:Ce eutectic phosphor by partial Gd ion substitution

Cited by 15 publications

References 24 publications

Outstanding optical temperature sensitivity and dual‐mode temperature‐dependent photoluminescence in Ho³⁺‐doped (K,Na)NbO₃–SrTiO₃ transparent ceramics

Outstanding optical temperature sensitivity and dual‐mode temperature‐dependent photoluminescence in Ho³⁺‐doped (K,Na)NbO₃–SrTiO₃ transparent ceramics

Boosting Upconversion Photoluminescence and Multielectrical Properties via Er-Doping-Modulated Vacancy Control in Ba_0.85Ca_0.15Ti_0.9Zr_0.1O₃

Hf⁴⁺ Ion Concentration Dependence of Holographic Storage Properties in Hf:Fe:Cu:LiNbO₃ Crystals

Contact Info

Product

Resources

About

Performance enhancement of white LED with TAG-Al2O3:Ce eutectic phosphor by partial Gd ion substitution

Cited by 15 publications

References 24 publications

Outstanding optical temperature sensitivity and dual‐mode temperature‐dependent photoluminescence in Ho3+‐doped (K,Na)NbO3–SrTiO3 transparent ceramics

Outstanding optical temperature sensitivity and dual‐mode temperature‐dependent photoluminescence in Ho3+‐doped (K,Na)NbO3–SrTiO3 transparent ceramics

Boosting Upconversion Photoluminescence and Multielectrical Properties via Er-Doping-Modulated Vacancy Control in Ba0.85Ca0.15Ti0.9Zr0.1O3

Hf 4+ Ion Concentration Dependence of Holographic Storage Properties in Hf:Fe:Cu:LiNbO3 Crystals

Contact Info

Product

Resources

About

Outstanding optical temperature sensitivity and dual‐mode temperature‐dependent photoluminescence in Ho³⁺‐doped (K,Na)NbO₃–SrTiO₃ transparent ceramics

Outstanding optical temperature sensitivity and dual‐mode temperature‐dependent photoluminescence in Ho³⁺‐doped (K,Na)NbO₃–SrTiO₃ transparent ceramics

Boosting Upconversion Photoluminescence and Multielectrical Properties via Er-Doping-Modulated Vacancy Control in Ba_0.85Ca_0.15Ti_0.9Zr_0.1O₃

Hf⁴⁺ Ion Concentration Dependence of Holographic Storage Properties in Hf:Fe:Cu:LiNbO₃ Crystals