Pyrene compound and organic electroluminescent device including the same
A pyrene compound represented by general formula (1): wherein X represents one of a naphthalene ring and phenanthrene ring: when X represents the naphthalene ring, a 1-pyrenyl group indicated in general formula (1) is bonded to a 2-position of the naphthalene ring; when X represents the phenanthrene ring, the 1-pyrenyl group is bonded to one of a 2-position and a 3-position of the phenanthrene ring; and R1 and R2 are each independently selected from a hydrogen atom and an alkyl group.
1. A pyrene compound represented by general formula (1):
wherein X represents one of a naphthalene ring and a phenanthrene ring; when X represents the naphthalene ring, a 1-pyrenyl group indicated in general formula (1) is bonded to a 2-position of the naphthalene ring; when X represents the phenanthrene ring, the 1-pyrenyl group is bonded to one of a 2-position and a 3-position of the phenanthrene ring; and R1 and R2 are each independently selected from a hydrogen atom and an alkyl group.
2. The pyrene compound according to claim 1 , wherein at least one of R1 and R2 represents a tert-butyl group.
3. A host material contained in an emission layer of an organic electroluminescent device, the host material comprising:
the pyrene compound according to claim 1 .
4. An organic electroluminescent device comprising:
an anode;
a cathode;
an emission layer interposed between the anode and the cathode; and
a hole transport layer interposed between the emission layer and the anode and in contact with the emission layer,
wherein the emission layer emits light when an electric field is applied between the anode and the cathode,
the emission layer contains a host material and a guest material, and
the host material is the pyrene compound according to claim 1 .
5. The organic electroluminescent device according to claim 4 , wherein the guest material is a blue light-emitting material.
6. An image display apparatus comprising:
a plurality of pixels each including the organic electroluminescent device according to claim 4 and a thin film transistor device,
wherein the anode or the cathode of the organic electroluminescent device is connected to a drain electrode or a source electrode of the thin film transistor device.
7. An image input apparatus comprising:
a display unit; and
an image input unit configured to read images,
wherein the display unit includes a plurality of pixels each including the organic electroluminescent device according to claim 4 and a thin film transistor device, and
the anode or the cathode of the organic electroluminescent device is connected to a drain electrode or a source electrode of the thin film transistor device.
8. An organic electroluminescent device comprising:
an anode;
a cathode; and
an emission layer interposed between the anode and the cathode, the emission layer comprising the pyrene compound according to claim 1 .
9. The organic electroluminescent device according to claim 8 ,
wherein the emission layer comprises a host and a guest, and
wherein the host is the pyrene compound.
10. The organic electroluminescent device according to claim 9 ,
the guest is a compound represented by the following structure
11. A lighting apparatus comprising the organic electroluminescent device according to claim 8 .
12. An electrophotographic image forming apparatus comprising an exposure light source,
the exposure light source comprising the organic electroluminescent device according to claim 8 .
13. An exposure light source of an electrophotographic image forming apparatus comprising the organic electroluminescent device according to claim 8 .