An organic electroluminescence device includes an anode, an emitting layer, an electron-transporting region, and a cathode, the anode, the emitting layer, the electron-transporting region, and the cathode being stacked in this order, the emitting layer including a host material, and a dopant material that emits fluorescence having a main peak wavelength of 550 nm or less, the electron-transporting region including a barrier layer that is adjacent to the emitting layer, and the barrier layer including a barrier material that includes an electron-transporting structural part, and a triplet barrier structural part that includes a fused polycyclic aromatic hydrocarbon compound, and satisfies the relationship “E
T
b
>E
T
h
” (where, E
T
h
is the triplet energy of the host material, and E
T
b
is the triplet energy of the barrier material).
NITROGENATED HETEROCYCLIC RING DERIVATIVE AND ORGANIC ELECTROLUMINESCENT ELEMENT COMPRISING SAME
申请人:Kawamura Masahiro
公开号:US20120132899A1
公开(公告)日:2012-05-31
A nitrogen-containing heterocyclic derivative represented by the following formula (1):
wherein any “12-a” groups of R
1
to R
12
are independently a hydrogen atom, a fluorine atom, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms; any “a” groups of R
1
to R
12
are independently a single bond which is bonded to L
1
; L
1
is a single bond, a “b+1” valent substituted or unsubstituted hydrocarbon ring group having 6 to 30 ring carbon atoms or a “b+1” valent substituted or unsubstituted heterocyclic group having 5 to 30 ring atoms;
HAr is a substituted or unsubstituted nitrogen-containing heterocyclic group; and
“a” and “b” are independently an integer of 1 to 4, and at least one of “a” and “b” is 1. Also disclosed is a nitrogen-containing heterocyclic derivative represented by the following formula (21) or (31):
BENZOPHENANTHRENE DERIVATIVE AND ORGANIC ELECTROLUMINESCENCE DEVICE EMPLOYING THE SAME
申请人:Idemitsu Kosan Co., Ltd.
公开号:US20130285029A1
公开(公告)日:2013-10-31
A fused aromatic ring derivative shown by the following formula (1):
wherein R
a
and R
b
are independently a hydrogen atom or a substituent, p is an integer of 1 to 8 and q is an integer of 1 to 11, when p is 2 or more, plural R
a
s may be independently the same or different and adjacent R
a
s may form a ring, when q is 2 or more, plural R
b
s may be independently the same or different, L
1
is a single bond, or a substituted or unsubstituted divalent linking group, and Ar
1
is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, provided that the substituent of L
1
, the substituent of Ar
1
, R
a
and R
b
contain no substituted or unsubstituted amino group.
An organic electroluminescence device includes an anode, an emitting layer, an electron-transporting region, and a cathode, the anode, the emitting layer, the electron-transporting region, and the cathode being stacked in this order, the emitting layer including a host material, and a dopant material that emits fluorescence having a main peak wavelength of 550 nm or less, the electron-transporting region including a barrier layer that is adjacent to the emitting layer, and the barrier layer including a barrier material that includes an electron-transporting structural part, and a triplet barrier structural part that includes a fused polycyclic aromatic hydrocarbon compound, and satisfies the relationship “ETb>ETh” (where, ETh is the triplet energy of the host material, and ETb is the triplet energy of the barrier material).
Benzophenanthrene derivative and organic electroluminescent device employing the same
申请人:Kawamura Masahiro
公开号:US08507106B2
公开(公告)日:2013-08-13
A fused aromatic ring derivative shown by the following formula (1):
wherein Ra and Rb are independently a hydrogen atom or a substituent, p is an integer of 1 to 8 and q is an integer of 1 to 11, when p is 2 or more, plural Ras may be independently the same or different and adjacent Ras may form a ring, when q is 2 or more, plural Rbs may be independently the same or different, L1 is a single bond, or a substituted or unsubstituted divalent linking group, and Ar1 is a substituted or unsubstituted aryl group having 6 to 50 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 50 ring atoms, provided that the substituent of L1, the substituent of Ar1, Ra and Rb contain no substituted or unsubstituted amino group.