Novel fluorescent blue-emitting materials based on anthracene-fluorene hybrids with triphenylsilane group for organic light-emitting diodes

Song, Ji Young; Park, Soo Na; Lee, Seok Jae; Kim, Young Kwan; Yoon, Seung Soo

doi:10.1016/j.dyepig.2014.11.003

Cited by 24 publications

(8 citation statements)

References 16 publications

(19 reference statements)

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“…The intensity of the EL emission increased when the applied voltage was enhanced, behaving like typical OLEDs. More than twelve electroluminescent devices were fabricated and tested, and these devices behaved similarly, with the turn-on voltages varying from 24 V to 30 V. The turn-on voltage of EL for NNU-27 is much higher than those of OLEDs (usually 3-8 V), 28,29 and this is due to the very large thickness of the device (larger than 100 mm caused by a single crystal sample). The electroluminescence of NNU-27 should result from the electric-field induced electromers relying on the unique spatial arrangement of the anthracene-based ligand in the structure.…”

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confidence: 99%

Electrical conductivity and electroluminescence of a new anthracene-based metal–organic framework with π-conjugated zigzag chains

et al. 2016

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A new three-dimensional microporous MOF has been constructed using a highly conjugated anthracene-based ligand. The rarely occurring long-range π-stacking of the ligand in the form of a zigzag chain has been found in the MOF structure, which provides not only a new charge transport pathway with high electrical conductivity of 1.3 (±0.5) × 10(-3) S cm(-1) but also an electroluminescence property with an emission centred at 575 nm.

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confidence: 99%

Electrical conductivity and electroluminescence of a new anthracene-based metal–organic framework with π-conjugated zigzag chains

et al. 2016

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“…The optical bandgaps of DSiDCzSi and DCzSi estimated from their onsets of the absorption spectra in thin film are as large as 3.51 and 3.68 eV, suggesting the extended conjugation of DSiDCzSi due to the enhanced d‐orbital participated σ–π conjugation through introducing additional triphenylsilanes . The absorption and PL spectra of DSiDCzSi and DCzSi in thin films show limited variations compared to their optical profiles in solutions, revealing that the introduction of multiple σ‐units of triphenylsilanes could effectively suppress the intermolecular interaction in solid states . DCzSi and DSiDCzSi show quite similar PL lifetimes of ≈0.73 and 0.79 ns in CH 2 Cl 2 solution and 1.01 and 1.03 ns in film (Figure S4, Supporting Information), respectively.…”

Section: Device Performances Of Dczsi and Dsidczsi Hosted Blue Pholedsmentioning

confidence: 99%

Multiple σ–π Conjugated Molecules with Selectively Enhanced Electrical Performance for Efficient Solution‐Processed Blue Electrophosphorescence

Zhi

et al. 2019

Advanced Optical Materials

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Phosphorescent organic light-emitting diodes (PhOLEDs) have attracted intense attention owing to their theoretical 100% internal quantum efficiency through simultaneously utilizing singlet and triplet excitons. [1] With the tremendous efforts over the past few decades, the thermalevaporated electrophosphorescence devices with excellent external quantum efficiencies (EQEs) and operation lifetimes have been achieved. [2][3][4][5][6] Nevertheless, the development of high-efficiencies blue PhOLEDs remains as a daunting and forbidden challenge although blue emission is indispensable to improve color rendering index and color gamuts. [7][8][9][10][11][12] Moreover, the vacuum-deposited PhOLEDs require complicated technological processes and precisely controlling of concentrations of different materials in emission layer (EML) for realizing high device performance, which leads to relatively high fabrication costs. Solution-processed PhOLEDs based on spin-coating, blade coating and/or inkjet printing have been introduced with insistence because of their ultimate potential in facilitating largearea, low-cost, and high-efficiency flat-panel display as well as lighting products. [13,14] However, it is still quite difficult to develop solution-processed organic semiconductors simultaneously with the characteristics of good-solubility, large bandgap, and good carrier transportation for high-performance solutionprocessed blue PhOLEDs, which are fundamentally important for next-generation lighting sources and displays technologies.Commonly, the host-dopant systems are generally adopted to controllably eliminate the triplet-involved quench effects of emissive phosphors in the PhOLEDs. [15] The basic metrics of solution-processed hosts are excellent electrical property for endowing efficient and balanced carrier injection and flux, and high triplet energy (E T ) levels for maintaining exothermic energy migration from the hosts to dopants and confining the triplet excitons in EML. [16,17] Furthermore, additional requirements of hosts have to be simultaneously fulfilled to support high-efficiency solution-processed PhOLEDs: [18,19] i) good solubility in common organic solvent to fabricate stable, uniform and pin-hole free films, ii) high thermal and chemical stability to endow high temperature thermal annealing for eliminating Selectively and controllably regulating molecular functions of organic optoelectronic materials with high solubility for solution-processible devices is highly desired but remains as one of the most significant challenges in material science. Here, a concise molecular design strategy is reported to achieve effective electronic communications using efficient d-orbital participated σ-π conjugations between Si and π unit for purposely modulating the electrical properties of organic optoelectronic materials. Through a two-step reaction in high yield, DSiDCzSi with the enhanced σ-π conjugation is facilely constructed by introducing multiple triphenylsilanes into carbazole unit. Impressively, DSiD-CzSi demonstrates...

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“…Antrasen üç aromatik halka içermesi, fotofiziksel ve benzersiz özellikleri sayesinde polimer bilimindeki birçok uygulamada uzun süredir çalışılmaktadır [1]. Atrasen konjuge yapısı kolay elektron haraketliliği sağladığından organik transistörler [2][3][4] ve OLED uygulamaları için ilgi çekici olmuştur [5][6]. Polimer yapısındaki antrasenin çarpıcı özelliklerini daha iyi anlamak için, metil metakrilat (MMA) gibi reaktif fonksiyonel gruplar içermeyen bir monomerle kopolimerlerinin hazırlanması faydalı olacaktır.…”

Section: Introductionunclassified

Preparation of New Anthracene Based Copolymer System and Graphene Composites, Investigation of Thermal and Electrical Properties

Biryan

2020

Türk Doğa Ve Fen Dergisi

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Bu çalışma, antrasen içeren kalkon yan zincirli yeni kopolimer sisteminin termal ve elektriksel özelliklerini incelemeyi amaçlamıştır. Monomer ve kopolimerlerin yapıları FT-IR, 1 H-NMR ve 13 C-NMR teknikleri kullanılarak karakterize edildi. Kopolimerlerin termal davranışları DSC ve TGA kullanılarak analiz edildi. Kopolimerdeki antrasen birimlerinin artmasıyla camsı geçiş sıcaklığının 123 °C'den 142 °C'ye yükseldiği gözlemlendi. Kopolimer matriksine % 4 grafen partikülleri ilave edilerek yarı-iletken kompozitler hazırlandı. Kopolimerlerin ve grafen kompozitlerinin dielektrik ölçümleri 100 Hz-20 kHz frekans aralığında empedans analizör tekniği kullanılarak incelendi. P(MMA-ko-AAPAc 0.43)'ın dielektrik sabiti grafenin ilavesiyle 5.21'den 273.28'e yükseldi. Kompozitlerin aktivasyon enerjisi değerleri, sıcaklığın bir fonksiyonu olarak DC iletkenliği ölçülerek elde edildi. Aktivasyon enerjisi değerleri P(MMA-ko-AAPAc 0.16), P(MMA-ko-AAPAc 0.31) ve P(MMA-ko-AAPAc 0.43) için sırasıyla 0.320, 0.077 ve 0.040 eV olarak belirlendi.

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Novel fluorescent blue-emitting materials based on anthracene-fluorene hybrids with triphenylsilane group for organic light-emitting diodes

Cited by 24 publications

References 16 publications

Electrical conductivity and electroluminescence of a new anthracene-based metal–organic framework with π-conjugated zigzag chains

Electrical conductivity and electroluminescence of a new anthracene-based metal–organic framework with π-conjugated zigzag chains

Multiple σ–π Conjugated Molecules with Selectively Enhanced Electrical Performance for Efficient Solution‐Processed Blue Electrophosphorescence

Preparation of New Anthracene Based Copolymer System and Graphene Composites, Investigation of Thermal and Electrical Properties

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