Synthesis, photophysics, electrochemistry, thermal stability and electroluminescent performances of a new europium complex with bis(β‐diketone) ligand containing carbazole group

Liu, Jian; Liang, Quanbin; Wu, Hongbin

doi:10.1002/bio.3206

Cited by 7 publications

(2 citation statements)

References 15 publications

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“…The prospect of using rare earth elements (REE) in the creation of luminophores for analytical purposes, in particular for sensors, is usually associated not only with high quantum yields, long luminescence lifetimes, and a wide spectral range (from UV to IR), in which narrow-band luminescence of REE compounds is observed [ 1 ], but is determined by the possibility of regulating the functional characteristics of such systems when organic ligands of different natures are introduced (usually, the introduction of several ligands out of 4–6 possible options is conformationally acceptable) with the formation of specific photoactive centers “REE ion–ligands” [ 2 , 3 , 4 ]. Moreover, ligands also act as “antennas” [ 5 , 6 , 7 ] for radiation-initiating luminescence.…”

Section: Introductionmentioning

confidence: 99%

Features of Luminescent Properties of Alginate Aerogels with Rare Earth Elements as Photoactive Cross-Linking Agents

Kaplin

Kopylov

Koryakovtseva

et al. 2022

Gels

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Luminescent aerogels based on sodium alginate cross-linked with ions of rare earth elements (Eu3+, Tb3+, Sm3+) and containing phenanthroline, thenoyltrifluoroacetone, dibenzoylmethane, and acetylacetone as ligands introduced into the matrix during the impregnation of alginate aerogels (AEG), were obtained for the first time in a supercritical carbon dioxide medium. The impregnation method used made it possible to introduce organically soluble sensitizing ligands into polysaccharide matrices over the entire thickness of the sample while maintaining the porous structure of the aerogel. It is shown that the pore size and their specific area are150 nm and 270 m2/g, respectively. Moreover, metal ions with content of about 23 wt.%, acting as cross-linking agents, are uniformly distributed over the thickness of the sample. In addition, the effect of sensitizing ligands on the luminescence intensity of cross-linked aerogel matrices is considered. The interaction in the resulting metal/ligand systems is unique for each pair, which is confirmed by the detection of broad bands with individual positions in the luminescence excitation spectra of photoactive aerogels.

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Section: Introductionmentioning

confidence: 99%

Features of Luminescent Properties of Alginate Aerogels with Rare Earth Elements as Photoactive Cross-Linking Agents

Kaplin

Kopylov

Koryakovtseva

et al. 2022

Gels

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“…Much higher increase in PCEs has also been reported, but that involve materials and/or techniques which are expensive and/or complicated and consequently cannot be readily implemented in the field. Also, Eu 3+ , which is by far the most widely used material for down-shifting applications, is not very stable under heat and hence requires a suitable encapsulation for outdoor applications [25,26].…”

Section: Introductionmentioning

confidence: 99%

Spectral conversion by silicon nanocrystal dispersed gel glass: efficiency enhancement of silicon solar cell

Das¹,

Hossain²,

Nandi³

et al. 2021

J. Phys. D: Appl. Phys.

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Alongside the quest for new materials for development of next-generation solar cells, increasing the efficiency of the existing crystalline silicon-based photovoltaic module is of paramount importance. In this work we prepared a silicon nanocrystal (NC) dispersed gel-glass and used it as a luminescent down shifting material to enhance the efficiency of a conventional solar cell module. The synthesized gel-glass efficiently converts the unutilized high energy UV photons of the solar spectrum to blue-green photons and renders them amenable for effective carrier generation. An exceptionally high quantum yield (42.8%) of photon down conversion could be achieved with the luminescent silicon NCs. Following the insertion of the NC embedded gel-glass, the relative photon conversion efficiency and the short circuit current of the solar cell were found to increase by 6.48% and 4.2%, respectively. Further improvement of solar cell efficiency using this material could be achieved by optimized design and deposition and by optimizing the formation parameters of the gel-glass.

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Red emissive ternary europium complexes: synthesis, optical, and luminescence characteristics

et al. 2022

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Solid ternary europium complexes consisting of fluorinated β‐diketone (thenoyltrifluoroacetone, TTFA) and heteroaromatic bidentate auxiliary ligands were synthesized. The luminescence features of the complexes were estimated using various spectral measurements and clearly proved that the Eu3+ ion is efficiently sensitized by ligands by an antenna effect. Photoluminescence excitation spectra have shown that Eu(III) complexes are excited effectively in the ultraviolet (UV) region and the corresponding emission spectra consist of characteristic peaks attributed to the 5D0→7FJ transitions of the europium ion with the strongest emission peak at 611 nm (5D0→7F2). From photoluminescence (PL) data, decay time, Judd–Ofelt parameters, transition rates, and quantum efficiency of the complexes were also determined. The Commission Internationale de l'éclairage (CIE) colour coordinates indicated the bright red emission of ternary europium complexes. Correlated colour temperature values indicated the utilization of these complexes in display devices. Judd–Ofelt and photophysical parameters were also estimated theoretically using LUMPAC software. Various frontier molecular orbitals and their respective energy were determined. These red emissive europium complexes could be utilized for fabricating solid‐state lighting systems.

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Synthesis, photophysics, electrochemistry, thermal stability and electroluminescent performances of a new europium complex with bis(β‐diketone) ligand containing carbazole group

Cited by 7 publications

References 15 publications

Features of Luminescent Properties of Alginate Aerogels with Rare Earth Elements as Photoactive Cross-Linking Agents

Features of Luminescent Properties of Alginate Aerogels with Rare Earth Elements as Photoactive Cross-Linking Agents

Spectral conversion by silicon nanocrystal dispersed gel glass: efficiency enhancement of silicon solar cell

Red emissive ternary europium complexes: synthesis, optical, and luminescence characteristics

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