Photoluminescent polymer composites with R, G, B emission and their potential applications in LCD displays

Stan, Corneliu Sergiu; Horlescu, Petronela; Popa, Marcel; Coroabă, Adina; Ursu, Laura

doi:10.1039/c6nj00386a

Cited by 8 publications

(3 citation statements)

References 25 publications

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“…The higher emission intensity is noticeable in terms of visual perception and also is clearly sustained by the absolute PL quantum yield (PLQY) investigation, which revealed markedly improved recorded values in the case of the prepared PVP-[Tb(NHF) 3 (DMF) 2 ] composite. The enhancement of the PLQY values through embedding of a photoluminescent complex in polymer matrices was also reported in other studies, 29,30 being most probably a result of the more favorable conditions in terms of excitation energy transfer to the emissive Tb 3+ centers achieved in the new environment and by the interactions that occurred between the carbonyl groups in the PVP matrix and the central cation, as highlighted by the FT-IR investigation.…”

Section: Fluorescence Analysissupporting

confidence: 82%

Photoemissive polymer composite based on new Y(III), Gd(III), and Tb(III) complexes with N-hydroxyphthalimide

Rosca¹,

Horlescu²,

Stan³

et al. 2017

Turk J Chem

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Abstract:In the present work, a green emitting composite with attractive photoluminescent properties was obtained through the embedding of the Tb 3+ complex with N-hydroxyphthalimide in a poly-(N-vinyl-pyrrolidone) matrix, which was further processed in thin or thick films. First, several complexes of Gd 3+ , Tb 3+ , and Y 3+ with N-hydroxyphthalimide with the general formula [M(NHF) 3 (DMF) 2 ] were prepared at a 1:3 metal/ligand ratio. The Tb 3+ complex presents specific emission peaks, with the most intense peak located at 543 nm, thus being selected for incorporation in the poly(N-vinyl-pyrrolidone) matrix. The prepared complexes and composites were investigated through elemental analysis, thermal analysis, FT-IR, P-XRD, and SEM. The photoluminescent properties were studied in detail. Remarkably, through the embedding in the poly(vinyl-pyrrolidone) matrix, the photoluminescent properties of the Tb 3+ complex are notably enhanced compared to the free complex.

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Section: Fluorescence Analysissupporting

confidence: 82%

Photoemissive polymer composite based on new Y(III), Gd(III), and Tb(III) complexes with N-hydroxyphthalimide

Rosca¹,

Horlescu²,

Stan³

et al. 2017

Turk J Chem

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“…Particularly, europium (Eu) has been extensively studied as a red-emitting material originating from 5 D 0 → 7 F 2 transition. [19][20][21][22][23] However, conventional Eu-containing complexes are typically synthesized in small amounts due to difficulties in controlling the complexation reaction and the difficulty of synthesis on a large (gram) scale. 24) This is due to the need for expensive and specialized starting materials, the complexity of controlling the complexation reaction, 25) and the sophistication of the analytical techniques required to confirm the purity and structure of the complexes.…”

Section: Introductionmentioning

confidence: 99%

Preparation of red fluorescent materials for a solution process using europium-doped benzoguanamine

Niimi,

Takemura,

Ohtani

2023

Jpn. J. Appl. Phys.

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This study aims to develop a novel, efficient, and stable red-emitting material using benzoguanamine in which europium (Eu) is doped. We have demonstrated a simple, low-cost, gram-scale manufacturing process via an anneal synthesis method. By changing the Eu-doping concentration from 1 to 20 wt%, we found that the sample containing the Eu-doping concentration of 10 wt% shows the maximum photoluminescence quantum yield (PLQY) peak of 13.7%. Additionally, we confirmed the characteristic luminescence peaks of Eu ions. We also achieved a sharp red emission with a high color purity and a half-peak width of 13 nm. Furthermore, it exhibits high solubility in organic solvents, facilitating its application through wet processes. This new red-emitting material may present a promising solution for cost-effectively fulfilling the demand in flat panel displays and illumination light sources.

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“…These 4f electronic states of lanthanide ions are shielded by their outer 5s and 5p electronic orbitals, and the partially electronic transitions between 4f orbital electronic states are strictly forbidden [13,14]. Eu 3+ and Tb 3+ ions are well known for their sharp emission bands locating around 612 nm and 545 nm, respectively [15,16]. With the interference of suitable ligands, Eu 3+ and Tb 3+ complexes usually exhibit prominent red and green light.…”

Section: Introductionmentioning

confidence: 99%

Ln3+-Induced Diblock Copolymeric Aggregates for Fully Flexible Tunable White-Light Materials

Wang

Tang²,

Wang³

et al. 2019

Nanomaterials

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In this research contribution, nano-aggregates have been fabricated by introducing lanthanide (Ln3+) ions into solutions of amphiphilic diblock copolymers of polystyrene-b-poly (acrylic acid) (PS-b-PAA). The coordination of acrylic acid segments to lanthanide cations induces diblock copolymer (BCPs) self-assembly in order to design stable white luminescent hybrid nanoparticles with fine uniform particle size. The introduction of Ln3+ ions (Eu3+ and Tb3+) bestows the micelles, precisely white light, upon excitation of 342 nm. Lanthanide coordination cross-linking of poly (acrylic acid) segments, or blocks, endows the micelles higher thermal stability than that of BCPs micelles without cross-linking. As the most important key point of this work, the regular and stable nano-particles with high emission quality can make fully flexible electroluminescent devices with self-formation or uncoordinated into polymer hosts. Instead of inorganic luminescent nanoparticles with hard cores, this method can potentially apply for fully flexible white-light emitting diodes (FFWLEDs).

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Photoluminescent polymer composites with R, G, B emission and their potential applications in LCD displays

Abstract: Photoluminescent polymer composites with RGB emission were prepared, investigated and tested in a configuration which could replace the usual RGB filters in AMLCD displays.

Cited by 8 publications

References 25 publications

Photoemissive polymer composite based on new Y(III), Gd(III), and Tb(III) complexes with N-hydroxyphthalimide

Photoemissive polymer composite based on new Y(III), Gd(III), and Tb(III) complexes with N-hydroxyphthalimide

Preparation of red fluorescent materials for a solution process using europium-doped benzoguanamine

Ln3+-Induced Diblock Copolymeric Aggregates for Fully Flexible Tunable White-Light Materials

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