Creating and stabilizing Bi NIR-emitting centers in low Bi content materials by topo-chemical reduction and tailoring of the local glass structure

Cao, Jiangkun; Li, Liyi; Wang, Liping; Li, Xiaoman; Zhang, Ziyang; Xu, Shanhui; Peng, Mingying

doi:10.1039/c8tc00540k

Cited by 43 publications

(46 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As previously reported in Bi-doped glasses, the absorptions around ~500 and ~700 nm are typically contributed by lower valent Bi species. [29][30][31] These results mean that both the visible and NIR active centers may exist in our glass samples. Further assignments will be discussed later.…”

Section: Methodsmentioning

confidence: 73%

Controllable ultra‐broadband visible and near‐infrared photoemissions in Bi‐doped germanium‐borate glasses

Liu

Cheng

et al. 2019

J Am Ceram Soc

Self Cite

View full text Add to dashboard Cite

The design of functional materials with tunable broadband luminescence performance is still of great interest in the fields of lighting, solar cells, tunable lasers, and optical amplifiers. Here, via a melt‐quenching method, a series of bismuth (Bi)‐doped germanium‐borate glasses with composition of 40GeO2–25B2O3–25Gd2O3–10La2O3–xBi2O3 have been prepared, in which multiple Bi active centers can be stabilized simultaneously. Dual‐modulating modes of visible (380‐750 nm) and near‐infrared (NIR) (1000‐1600 nm) broadband photoemissions were effectively controlled under flexible excitation scheme. Photoluminescence (PL) spectra at low temperature 10‐298 K were appropriately employed to interpret such an unusual wide visible emission band. To further illustrate the origin of NIR component, transmission electron microscopy (TEM) measurement was carried out. It is demonstrated experimentally that the visible emission mainly originates from the collective contribution of the 3P1/3P0false→1S0 transitions of Bi3+, while the broadband NIR luminescence should be related to the formation of low valent Bi+ and (or) Bi0 centers. This work may help to enhance the knowledge of the complex luminescence mechanism for the Bi species and it also enables such transparent glass materials to be a promising candidate for the multifunctional tunable light source.

show abstract

Section: Methodsmentioning

confidence: 73%

Controllable ultra‐broadband visible and near‐infrared photoemissions in Bi‐doped germanium‐borate glasses

Liu

Cheng

et al. 2019

J Am Ceram Soc

Self Cite

View full text Add to dashboard Cite

show abstract

“…Previous reports indicate that local glass structure, especially the coordination of Al species, plays a vital role in modulating Bi NIR emission, including emission intensity and decay behaviors . Therefore, fully understanding the local glass structure will help us to comprehend the mechanism for this highly improved Bi NIR emission.…”

Section: Resultsmentioning

confidence: 99%

Enhanced NIR photoemission from Bi‐doped aluminoborate glasses via topological tailoring of glass structure

et al. 2018

Self Cite

View full text Add to dashboard Cite

Bismuth (Bi)‐doped laser glasses with broadband emission are of current interest in the fields of sensing, bio‐imaging, and photonics. For practical applications, it must be considered how to improve the emission efficiency, in particular, for borate glasses with wide glass‐forming range, low melting point, and excellent fiberizing ability. Herein, we experimentally demonstrate that addition of GeO2 to aluminoborate glasses can effectively enhance Bi NIR emission by more than 300 times with prolonged decay time (~500 μs) and good homogeneity, which is, to our best knowledge, seldom achieved in Bi‐doped borate multi‐component glasses. The addition of second glass‐former GeO2, as revealed by detailed optical and structural analysis, leads to the facile regulation on local glass structure, forcing the conversion of aluminum species from AlO5 and AlO6 to AlO4 and consequently pushes the conversion of Bi3+ to Bi+ and Bi0 and stabilizes Bi NIR centers, which finally results in highly enhanced Bi NIR emission. We believe these results could contribute to designing Bi‐activated multi‐component laser glass and fibers with efficient NIR photoemission.

show abstract

“…In addition, bismuth‐doped or ‐based materials present unique photoluminescence features, because Bi 3+ can function as both an activator and a sensitizer. Typically, Bi‐doped materials can be developed as phosphors to radiate from UV to IR region . Therefore, in this paper, we have studied Eu 3+ ‐doped BNT ceramic in order to improve its electrical properties and achieve excellent luminescence properties …”

Section: Introductionmentioning

confidence: 99%

“…Typically, Bi-doped materials can be developed as phosphors to radiate from UV to IR region. [22][23][24][25] Therefore, in this paper, we have studied Eu 3+ -doped BNT ceramic in order to improve its electrical properties and achieve excellent luminescence properties. 17,[26][27][28][29][30][31] In this paper, ceramics containing different amounts of Eu 3+ ions were developed by the solid-state reaction method.…”

Section: Introductionmentioning

confidence: 99%

Luminescence and electrical properties of Eu‐modified Bi_0.5Na_0.5TiO₃ multifunctional ceramics

et al. 2019

View full text Add to dashboard Cite

The Eu3+‐modified Bi0.5Na0.5TiO3 (BNT) ceramics have been fabricated by the solid‐state reaction method. The impact of Eu3+ doping on the structure, photoluminescence, and electrical properties has been studied by XRD, SEM, PL spectra, and LCR meter. X‐ray diffraction analysis reveals that the crystal structure of the samples is well matched with the trigonal perovskite, and the optimal temperature of presintering is 880°C. The Eu3+‐doped BNT ceramics show excellent red fluorescence at 614 nm corresponding to the 5D0→7F2 transition of Eu3+ under 466 nm excitation and relatively long fluorescence lifetime. The BNT‐0.02Eu ceramic density is up to 5.68 g/cm3 and the relative density is up to 94.6% with sintering temperature 1075°C. The piezoelectric constant (d33) of samples has been significantly improved up to 110 pC/N by Eu3+ doping. The BNT‐0.03Eu ceramic presintered at 880°C and sintered at 1050°C has good dielectric properties and excellent luminescence properties. Eu3+‐doped BNT ceramics make it potential applications for novel integrated electro‐optical and multifunctional devices.

show abstract

Creating and stabilizing Bi NIR-emitting centers in low Bi content materials by topo-chemical reduction and tailoring of the local glass structure

Abstract: Introducing nitride into a glass network creates and stabilizes Bi NIR-emitting centers, and therefore enhances their emission.

Cited by 43 publications

References 41 publications

Controllable ultra‐broadband visible and near‐infrared photoemissions in Bi‐doped germanium‐borate glasses

Controllable ultra‐broadband visible and near‐infrared photoemissions in Bi‐doped germanium‐borate glasses

Enhanced NIR photoemission from Bi‐doped aluminoborate glasses via topological tailoring of glass structure

Luminescence and electrical properties of Eu‐modified Bi_0.5Na_0.5TiO₃ multifunctional ceramics

Contact Info

Product

Resources

About

Creating and stabilizing Bi NIR-emitting centers in low Bi content materials by topo-chemical reduction and tailoring of the local glass structure

Abstract: Introducing nitride into a glass network creates and stabilizes Bi NIR-emitting centers, and therefore enhances their emission.

Cited by 43 publications

References 41 publications

Controllable ultra‐broadband visible and near‐infrared photoemissions in Bi‐doped germanium‐borate glasses

Controllable ultra‐broadband visible and near‐infrared photoemissions in Bi‐doped germanium‐borate glasses

Enhanced NIR photoemission from Bi‐doped aluminoborate glasses via topological tailoring of glass structure

Luminescence and electrical properties of Eu‐modified Bi0.5Na0.5TiO3 multifunctional ceramics

Contact Info

Product

Resources

About

Luminescence and electrical properties of Eu‐modified Bi_0.5Na_0.5TiO₃ multifunctional ceramics