Synthesis and luminescent property of fluorene-xanthene derivatives for new blue emitters

We have synthesized blue emitting compounds, DBI-SFX and SBF-SFX, by incorporating fluorene-9,9'-xanthene as main chromophore and introducing 1,2-diphenyl-1H-benzoimidazole and spirobi[fluorene] group. 1,2-Diphenyl-1H-benzoimidazole, 9,9'-spirobi[fluorene], and fluorene-9,9'-xanthene...

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Bibliographic Details
Published inMolecular Crystals and Liquid Crystals Vol. 679; no. 1; pp. 95 - 101
Main Authors Jang, Jiyoon, Kang, Seokwoo, Park, Miyeon, Kay, Kwang-Yol, Park, Jongwook
Format Journal Article
LanguageEnglish
Published Philadelphia Taylor & Francis 22.01.2019
Taylor & Francis Ltd
Subjects
benzoimidazole
Chromophores
Current efficiency
Efficiency
Emitters
OLEDs
Optical properties
Photoluminescence
Power efficiency
Quantum efficiency
spirobi[fluorene]
Synthesis
xanthene
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Summary:We have synthesized blue emitting compounds, DBI-SFX and SBF-SFX, by incorporating fluorene-9,9'-xanthene as main chromophore and introducing 1,2-diphenyl-1H-benzoimidazole and spirobi[fluorene] group. 1,2-Diphenyl-1H-benzoimidazole, 9,9'-spirobi[fluorene], and fluorene-9,9'-xanthene moieties were used to synthesize new blue emitters. The optical properties of synthesized materials were measured. Both materials emit real blue photoluminescence in the film state and SBF-SFX showed relatively high PLQY value. The synthesized materials were applied as EML in non-doped devices, and SBF-SFX had a current efficiency of 1.19cd/A, a power efficiency of 0.39lm/W and an external quantum efficiency of 1.10%, which is more than two times as high as that of DBI-SFX.
ISSN:1542-1406
1563-5287
1527-1943
DOI:10.1080/15421406.2019.1597551