- Tri-, tetra- and pentamers of 9,9'-spirobifluorenes through full ortho -linkage: High triplet-energy pure hydrocarbon host for blue phosphorescent emitter
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4,4'-Dibromo-9,9'-spirobifluorene was first synthesized, and from this intermediate, three fully ortho-linked tri-, tetra-, and pentamers of 9,9'-spirobifluorenes were constructed. The full ortho-linkage impedes the π conjugation of fluorene units, and guarantees their high triplet energies (ET = 2.80 eV). A device with the trimer as the first pure hydrocarbon host material for blue phosphor FIrpic shows a maximum current efficiency of 25 cd/A.
- Fan, Cong,Chen, Yonghua,Gan, Pei,Yang, Chuluo,Zhong, Cheng,Qin, Jingui,Ma, Dongge
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- Preparation method of 4, 4 '-dibromo-9, 9'-spirobifluorene
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The invention discloses a preparation method of 4, 4 '-dibromo-9, 9'-spirobifluorene, which comprises the following steps: preparing an intermediate product bis (2 '-bromo-[1, 1'-biphenyl]-2-yl) ketone by taking 2, 2 '-dibrominated biphenyl, n-butyllithiu
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Paragraph 0017-0021
(2020/03/09)
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- CONDENSED CYCLIC COMPOUND, COMPOSITION INCLUDING THE SAME, AND ORGANIC LIGHT-EMITTING DEVICE INCLUDING THE CONDENSED CYCLIC COMPOUND
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A condensed cyclic compound represented by Formula 1: wherein, in Formula 1, X11, X12, and R11 to R24 are the same as described in the specification.
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- MATERIALS FOR ORGANIC ELECTROLUMINESCENT DEVICES
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The present invention relates to compounds of the formula (1) which are suitable for use in electronic devices, in particular organic electroluminescent devices, and to electronic devices which comprise these compounds.
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Page/Page column 64; 65
(2016/06/15)
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- Spirobifluorene compounds for organic electroluminescent devices
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The present invention relates to compounds of the formula (1) which are suitable for use in electronic devices, in particular organic electroluminescent devices, and to electronic devices which comprise these compounds.
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Paragraph 0241; 0242; 0243; 0245
(2016/10/07)
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- SPIROBIFLUORENE COMPOUNDS FOR ORGANIC ELECTROLUMINESCENT DEVICES
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The present invention relates to compounds of the formula (1) which are suitable for use in electronic devices, in particular organic electroluminescent devices, and to electronic devices which comprise these compounds.
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Paragraph 0243; 0244; 0245
(2016/12/01)
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- MATERIALS FOR ORGANIC ELECTROLUMINESCENT DEVICES
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The present invention relates to compounds which are suitable for use in electronic devices, and to electronic devices, in particular organic electroluminescent devices, comprising these compounds.
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Paragraph 0189
(2016/10/07)
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