This invention relates to chrysene compounds that are useful in electroluminescent applications and are capable of blue emission. It also relates to electronic devices in which the active layer includes such a chrysene compound.
AROMATIC AMINE DERIVATIVE AND ORGANIC ELECTROLUMINESCENCE DEVICE EMPLOYING THE SAME
申请人:Funahashi Masakazu
公开号:US20080268283A1
公开(公告)日:2008-10-30
A specified aromatic amine derivative having a chrysene structure. An organic electroluminescence device which comprises at least one organic thin film layer comprising a light emitting layer sandwiched between a pair of electrode consisting of an anode and a cathode, wherein at least one of the organic thin film layer comprises the aromatic amine derivative singly or as its mixture component. Organic electroluminescence devices having a long lifetime and a high efficiency of light emission, and aromatic amine derivatives capable of realizing such organic electroluminescence devices are provided.
There is provided an electroactive composition. The composition has (a) a host material having Formula I
and (b) an electroactive dopant capable of electroluminescence having an emission maximum between 500 and 700 nm. In Formula I:
R
1
to R
8
are the same or different and can be H, alkyl, or alkoxy, or adjacent R groups may be joined together to form a 5- or 6-membered aliphatic ring, with the proviso that at least one of R
1
to R
8
is not H,
Ar
1
to Ar
4
are the same or different and are aryl groups,
A is the same or different at each occurrence and can be a single bond or a phenylene group, and
a and b are the same or different and are an integer of 0-2.
ORGANIC LIGHT EMITTING DIODE
申请人:Samsung Display Co., Ltd.
公开号:US20210159418A1
公开(公告)日:2021-05-27
An organic light emitting diode includes a first electrode, a hole transport region disposed on the first electrode, an emission layer disposed on the hole transport region, an electron transport region disposed on the emission layer, and a second electrode disposed on the electron transport region. The hole transport region includes a first hole transport layer which is directly disposed on the lower portion of the emission layer and has a first refractive index, and a second hole transport layer which is disposed on the lower portion of the first hole transport layer and has a second refractive index, thereby exhibiting an improved luminous efficiency characteristic.