Blue organic light-emitting diodes based on phenyl-bridged fluoranthene and triphenylene derivatives

Park, Soo Na; Lee, Hyun Woo; Kim, Young Seok; Kim, Jwajin; Lee, Song Eun; Lee, Ho Won; Kim, Young Kwan; Yoon, Seung Soo

doi:10.1016/j.synthmet.2015.05.020

Cited by 5 publications

(2 citation statements)

References 29 publications

(38 reference statements)

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“…[31][32][33][34][35] The moderately high photoluminescence quantum yields in the solid phase (F = 0.18-0.42) are due to the presence of greaters teric hindrance in the molecules because of the introduction of bulky substituents, which increases the flexibility and decreases electronic coupling between the molecules; therefore, this behavior is analogoust os imilar fluoranthene derivatives. [10,13,36] Aggregation formation or excimer coupling usuallyi nduces ab athochromic shift of the emission maxima in the solid phase, [11,35] as observed in the case of 2a-2c.O nthe other hand, the compounds that exhibit aggregation-induced blue-shifted emission (AIBSE) phenomena have also been reported. [33] The blue-shift-ed solid-phase emission, as in the case of 2d and 2e,i sq uite different to explain because the mechanismo ft his phenomena is not clear.…”

Section: Optical Properties Of Fluoranthene Derivatives 2a-f In Solutionmentioning

confidence: 97%

Luminescent‐Substituted Fluoranthenes—Synthesis, Structure, Electrochemistry, and Optical Properties

Słodek

Maroń

Pająk

et al. 2018

Chemistry A European J

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Six novel fluoranthene derivatives, namely, three terminally substituted and three bis(fluoranthene) units with fluorene, bithiophene, and carbazole spacers, were obtained through [2+2+2] cycloaddition and characterized completely. Based on the conducted studies, the obtained derivatives can be classified as donor-acceptor (D-A) and acceptor-donor-acceptor (A-D-A) systems, in which the fluoranthene unit acts as an electron-withdrawing unit. The optical results revealed that novel fluoranthene derivatives absorb light in the range λ=236-417 nm, which originates from a π→π transition within the conjugated system. The compounds exhibit fluorescence that range from deep blue to green, which mainly arises from intramolecular charge transfer (ICT) states. High Stoke shifts and high quantum yields in solution (ϕ=0.22-0.57) and in the solid state (ϕ=0.18-0.44) have been observed for fluoranthene derivatives. All the derivatives display multistep oxidation processes at low potentials. The electronic structure of the presented compounds is additionally supported by time-dependent DFT computations.

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Section: Optical Properties Of Fluoranthene Derivatives 2a-f In Solutionmentioning

confidence: 97%

Luminescent‐Substituted Fluoranthenes—Synthesis, Structure, Electrochemistry, and Optical Properties

Słodek

Maroń

Pająk

et al. 2018

Chemistry A European J

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“…However, the blue materials have problems for exciton instability, limited charge injection, and lifetime in device because of intrinsic wide energy band-gap. [5][6][7] Therefore, numerous blue emitting derivatives were investigated such as anthracene, 8,9) triphenylamine, 10) and carbazole. 11) However, their EL properties are needed to be improved for the practical applications.…”

Section: Introductionmentioning

confidence: 99%

Blue emitting materials containing dibenzo[b,d]furan and dibenzo[b,d]thiophene for organic light-emitting diodes

Lee

Jeong

Lee

et al. 2016

Jpn. J. Appl. Phys.

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In this study, we designed and synthesized three blue emitting materials containing dibenzo[b,d]furan and dibenzo[b,d]thiophene. To investigate the electroluminescence (EL) properties, we fabricated devices with following sequences: indium–tin-oxide (180 nm)/N,N′-diphenyl-N,N′-(1-napthyl)-(1,1′-phenyl)-4,4′-diamine (50 nm)/blue emitters (30 nm)/bathophenanthroline (30 nm)/lithium quinolate (2 nm)/Al (100 nm). A device using 1,4-bis(dibenzo[b,d]furan-4-yl)naphthalene showed the deep-blue emission with 1.34% of external quantum efficiency at 30 mA/cm2. The Commission Internationale de l’Eclairage (CIE) coordinates of this device was at 6.0 V.

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π–π stacking: a strategy to improve the electron mobilities of bipolar hosts for TADF and phosphorescent devices with low efficiency roll-off

et al. 2017

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Blue organic light-emitting diodes based on phenyl-bridged fluoranthene and triphenylene derivatives

Cited by 5 publications

References 29 publications

Luminescent‐Substituted Fluoranthenes—Synthesis, Structure, Electrochemistry, and Optical Properties

Luminescent‐Substituted Fluoranthenes—Synthesis, Structure, Electrochemistry, and Optical Properties

Blue emitting materials containing dibenzo[b,d]furan and dibenzo[b,d]thiophene for organic light-emitting diodes

π–π stacking: a strategy to improve the electron mobilities of bipolar hosts for TADF and phosphorescent devices with low efficiency roll-off

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