Spirally configured cis-stilbene/fluorene hybrid compounds and organic light emitting device comprising the same
The present invention provides a series of spirally configured cis-stilbene/fluorene hybrid compounds and an optoelectronic device comprising the same. The compound comprises a seven-membered ring portion. The seven-membered ring portion is composed of a cis-stilbene fragment, and a tetrahedral coordination bridging atom fragment, wherein the cis-stilbene fragment has at least one substituent, the substituent is independently a substituted or unsubstituted triazine group, pyrimidine group or phenyl group. The compounds have glass transition temperatures ranged from 156° C. to 202° C., decomposition temperatures ranged from 419° C. to 509° C., reversible electron transport property, and balanced charges motilities. In addition, a variety of experimental data have proved that these spirally configured cis-stilbene/fluorene hybrid materials can indeed be used as a hole-blocking type electron-transporter for phosphorescent OLEDs.
1. A compound is represented by general formula I:
wherein A is carbon atom or silicon atom;
wherein R 2 is independently a triazine group, pyrimidine group or phenyl group;
when R 2 is a triazine group, R 2 is selected from the group consisting of general formula II-1-1, general formula II-1-5 to general formula II-1-19;
when R 2 is a pyrimidine group, R 2 is selected from the group consisting of general formula II-2-1, general formula II-2-3 to formula II-2-10;
when R 2 is phenyl group, R 2 is selected from the group consisting of general formula II-3-2 to general formula II-3-4;
wherein R 3 is independently a methyl group, phenyl group, tert-butyl group or two of R 3 are linked by a single bond represented by general formula I-2, and
wherein R 1 is a hydrogen atom, tert-butyl group or naphthyl group.
2. The compound of claim 1 , which is applied in an organic light emitting device (OLED) for being as a hole-blocking material and/or an electron-transporting material.
3. The compound of claim 1 , wherein the compound has glass transition temperatures (Tg) ranged from 156° C. to 202° C., decompositiontemperatures (Td) ranged from 419° C. to 463° C., oxidation potentials ranged from 1.04 V to 1.16 V and redox potentials ranged from −1.75 V to −1.93 V.
4. An optoelectronic device, comprising:
a first electrode, an interlayer and a second electrode sequentially disposed on a substrate, wherein the interlayer has a compound, the compound is represented by general formula I:
wherein A is carbon atom or silicon atom;
wherein R 2 is independently a triazine group, pyrimidine group or phenyl group;
when R 2 is a triazine group, R 2 is selected from the group consisting of general formula II-1-1, general formula II-1-5 to general formula II-1-19;
when R 2 is a pyrimidine group, R 2 is selected from the group consisting of general formula II-2-1, general formula II-2-3 to formula II-2-10;
when R 2 is phenyl group, R 2 is selected from the group consisting of general formula II-3-2 to general formula II-3-4;
wherein R 3 is independently a methyl group, phenyl group, tert-butyl group or two of R 3 are linked by a single bond represented by general formula I-2, and
wherein R 1 is a hydrogen atom, tert-butyl group or naphthyl group.
5. The optoelectronic device of claim 4 , wherein the optoelectronic device is an organic light emitting device (OLED), the interlayer is an electron transport layer and/or a hole blocking layer.