Non-symmetric 9,10-Di(2-naphthyl)anthracene derivatives as hosts and emitters for solution-processed blue fluorescent organic light emitting diodes

Ha, Hyein; Cho, Jinhwi; Lee, Ja Yeon; Yun, Buyong; Lee, Jihoon; Suh, Min Chul

doi:10.1016/j.jiec.2020.03.016

Cited by 6 publications

(2 citation statements)

References 27 publications

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“…[48] Upon stepwise increase of the ratio of emitter to host between 1 % and 10 %, we found that a ratio of 5 % emitter in CBP yielded the most homogenous films without phase separation. Quantum yields improved to 52 % (3), 51 % (9), 41 % (11) and 28 % (12). It should be noted that a CBP-only film shows a low PLQY of 2.5 %, not contributing to the PLQY increase of the materials.…”

Section: Organic Light-emitting Diodes (Oleds)mentioning

confidence: 94%

“…Anthracenes are widely used and easily synthesized emitters in organic light-emitting diodes (OLEDs). [1][2][3][4][5][6][7][8][9][10][11] They are processable both from solution [12] or via vacuum deposition, [5] and exhibit (deep-)blue emission with quantum yields (Φ) approaching unity. [13][14][15] This is a prerequisite to achieving high external quantum efficiencies, as only 25 % of all excitons in devices based on conventional fluorophores can be harvested.…”

Section: Introductionmentioning

confidence: 99%

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Doubly Bridged Anthracenes: Blue Emitters for OLEDs

Ludwig,

Mayer,

Ahrens

et al. 2023

Chemistry A European J

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The photooxidative stability of a series of doubly bridged anthracenes was evaluated after their preparation via twofold macrocyclization of a bis(resorcinyl)anthracene. Lightfastness correlates with the energy levels of the highest occupied molecular orbital (HOMO), resulting in superior stability of the tetraesters compared to the tetraethers. The lengths and steric demand of the linker only plays a minor role for the ester‐based compounds, which can be prepared in reasonable yields and thus tested in proof‐of‐concept organic light‐emitting diodes. Double ester‐bridging allows deep blue electro‐luminescence, highlighting the importance of the choice of the functional groups used for macrocyclization.

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Section: Organic Light-emitting Diodes (Oleds)mentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Doubly Bridged Anthracenes: Blue Emitters for OLEDs

Ludwig,

Mayer,

Ahrens

et al. 2023

Chemistry A European J

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Intrinsically Stretchable Emissive Layer for Green and Red Phosphorescent OLEDs: Small Molecules Blended with SEBS Elastomer

Ha,

Kim,

Shim

et al. 2023

Adv Materials Technologies

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In the field of stretchable electronics, intrinsically stretchable organic light‐emitting diodes (IS‐OLEDs) are considered to be essential units. However, research on stretchable electroluminescent layers for light‐emitting devices is limited. The most common method to obtain an effective stretchable emitting layer is blending a conjugated polymer with an elastomer. In this study, blending small molecules with a thermoplastic styrene‐ethylene‐butylene‐styrene (SEBS) elastomer to fabricate a stretchable emitting layer is proposed. The mechanical, electrical, and morphological properties of the blended films are studied. The results show that the blended films can be stretched up to 200% without any morphological change such as cracking or particle shedding. Additionally, an OLED is fabricated with a stretchable electroluminescent layer and demonstrated its functionality.

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Constructing Soluble Anthracene‐Based Blue Emitters Free of Electrically Inert Alkyl Chains for Efficient Evaporation‐ and Solution‐Based OLEDs

et al. 2022

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Anthracene derivatives are one of the most promising blue emitters employed in organic light‐emitting devices (OLEDs) because of their electrochemical and thermal stabilities. However, their high crystallinity owing to their large π‐planar structures severely impedes the progress in the development of solution‐based systems. In this work, we developed two types of highly soluble multifunctional anthracene derivatives terminated with ortho‐biphenyl and triphenylamine moieties and showed high solubility in general organic solvents such as toluene, tetrahydrofuran, and cyclohexanone at high concentrations (>10 mg mL−1), and showed blue emission with a peak wavelength of ∼465 nm and a high photoluminescence quantum yield that ranges up to 81 %. Notably, these emitters are suitable for fabricating both evaporation‐ and solution‐based systems. The evaporation‐based system OLED achieved a high external quantum efficiency (EQE) of 5.4 %. While the solution‐processed system realized 4.8 %, exhibiting the best performance among the anthracene‐based solution‐processed OLEDs so far.

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Non-symmetric 9,10-Di(2-naphthyl)anthracene derivatives as hosts and emitters for solution-processed blue fluorescent organic light emitting diodes

Cited by 6 publications

References 27 publications

Doubly Bridged Anthracenes: Blue Emitters for OLEDs

Doubly Bridged Anthracenes: Blue Emitters for OLEDs

Intrinsically Stretchable Emissive Layer for Green and Red Phosphorescent OLEDs: Small Molecules Blended with SEBS Elastomer

Constructing Soluble Anthracene‐Based Blue Emitters Free of Electrically Inert Alkyl Chains for Efficient Evaporation‐ and Solution‐Based OLEDs

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