Quasi-Two-Dimensional Perovskite Nanosheets Based on the Triplet Energy Acceptor Molecule with Pure Green Emission Light

The syntheses of modified ortho or meta methylbenzoic acid by (3-aminopropyl)triethoxysilane and the preparation of their corresponding organic–inorganic molecular-based hybrid material with the two components equipped with covalent bonds are described. The organic part is a derivative of methyl benzoic acid, which is used to coordinate to Tb3+ and further introduced into silica matrices by Si–O bonds after hydrolysis and polycondensation processes. The Judd–Ofelt theory proves that covalency increases along with increasing reciprocal energy difference between the 4fN and 4fN−15d1 configurations. Ultraviolet absorption, phosphorescence spectra, and luminescence spectra were applied to characterize the photophysical properties of the obtained hybrid material, and the above spectroscopic data reveal that the triplet energy of modified methyl benzoic acid matches with the emissive energy level of Tb3+. In this way, the intramolecular energy transfer process took place within these molecular-based hybrids, and strong green emission of Tb3+ was obtained.

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Two-dimensional structural ordering in a chromophoric ionic liquid for triplet energy migration-based photon upconversion

Physical Chemistry Chemical Physics ◽

10.1039/c7cp06266d ◽

2018 ◽

Vol 20 (5) ◽

pp. 3233-3240 ◽

Cited By ~ 10

Author(s):

Shota Hisamitsu ◽

Nobuhiro Yanai ◽

Hironori Kouno ◽

Eisuke Magome ◽

Masaya Matsuki ◽

...

Keyword(s):

Ionic Liquid ◽

Energy Migration ◽

Triplet Exciton ◽

Two Dimensional ◽

Triplet Energy ◽

Structural Ordering ◽

Exciton Diffusion

Triplet exciton diffusion in a chromophoric ionic liquid with two-dimensional order is studied and utilized for photon upconversion.

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White-Light-Emitting Phosphate Phosphors of SrZn2(PO4)2: Eu2+, Mn2+ Synthesized through Combustion Process

Materials Science Forum ◽

10.4028/www.scientific.net/msf.688.344 ◽

2011 ◽

Vol 688 ◽

pp. 344-348

Author(s):

Xiao Song Yan ◽

Wan Wan Li ◽

Kang Sun

Keyword(s):

Emission Band ◽

Combustion Process ◽

Blue Emission ◽

Green Emission ◽

Mixture Ratio ◽

Blue Emission Band ◽

Light Emitting ◽

Green Emission Band ◽

Emission Color ◽

Emission Light

The SrZn2(PO4)2: Eu2+, Mn2+ phosphors were synthesized through combustion process with varying mixture ratio of Eu2+, Mn2+. The SrZn2(PO4)2: Eu2+, Mn2+ phosphor presents three emission bands under 365nm radiation: the blue emission band of 416 nm from Eu2+ occupying the Sr2+ site, the green emission band of 538 nm and the red emission band of 630 nm from Mn2+ occupying two different Zn2+ sites. Compared with the SrZn2(PO4)2: Eu2+, Mn2+ phosphor prepared through solid state reaction, the luminous intensity of the phosphor is greatly improved through the combustion reaction. White emission light with a high color rending index of 84.7 can be obtained from the phosphor of SrZn2(PO4)2: Eu2+, Mn2+, and the emission color tone of the phosphor varies from blue, white, and finally yellow by increasing the ratio of the concentrations of Eu2+ and Mn2+.

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Preparation and Luminescent Properties of Tb3+ Doped Bi2WO6 Phosphor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.851.72 ◽

2016 ◽

Vol 851 ◽

pp. 72-77

Author(s):

Li Na Guo ◽

Sha Ren

Keyword(s):

Green Emission ◽

Luminescent Properties ◽

Precipitation Method ◽

Luminescent Materials ◽

Light Emitting ◽

Conversion Materials ◽

New Type ◽

The Common ◽

Co Precipitation ◽

Emission Light

The Tb3+doped Bi2WO6 luminescent materials are synthesized by a co-precipitation method. The structure and composition of the samples were characterized by DTA-TG and XRD. The results showed that the formula of the sample is Bi2WO6 at the temperature of 600°C~900°C, which belongs to the needed and stable orthorhombic ctystal. The luminescence properties were characterized by UV-vis and fluorescence spectrophotometer. The results showed that, the phosphor can be effectively stimulated by blue light of 488 nm, we can get the intense green-emission, which corresponds to the 5D4→7F5 transitions of Tb3+. It indicates that the samples match the light-emitting wavelength of the common blue-emitting InGaN chips and are expected to be applicable to a new type of green-emission light conversion materials which are applicable to the blue LED chips.

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Quenching of the Yt-Base Fluorescence by Heavy-Atom Induced Intermoleeular Singlet-Triplet Energy Transfer

Zeitschrift für Naturforschung A ◽

10.1515/zna-1981-0113 ◽

1981 ◽

Vol 36 (1) ◽

pp. 76-77 ◽

Cited By ~ 3

Author(s):

I. Gryczyński ◽

A. Kawski ◽

S. Paszyc ◽

T. Skowyra

Keyword(s):

Energy Transfer ◽

Heavy Atom ◽

Acceptor Molecule ◽

Benzene Derivatives ◽

Quenching Rate ◽

Triplet Energy ◽

Naphthalene Derivatives ◽

Quenching Rate Constant ◽

Triplet Energy Transfer ◽

Derivatives Of

Quenching of the Yt-base fluorescence by a series of halogen derivatives of benzene and naphthalene was measured in dioxane. For the naphthalene derivatives, the presence of the heavy atom in the acceptor molecule was found to affect strongly the fluorescence quenching rate constant, whereas no such effect was observed for the benzene derivatives. The fact is explained with the assumption of a singlet-triplet energy transfer from the Yt- base molecules to the naphthalene derivatives

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