Diphenylamine/triazine hybrids as bipolar hosts for phosphorescent organic light-emitting diodes
作者:Yaxing Zhang、Yuanyuan Zheng、Binyan Wang、Huijuan Ran、Xiaoli Wang、Jian-Yong Hu、Qiang Wang
DOI:10.1039/c9tc06731k
日期:——
properties of the hybrids. The triplet excited state energy (ET) values of DPA–TRZ, DDPA–TRZ, and TDPA–TRZ are 2.38, 2.51, and 2.73 eV, respectively. To evaluate the electroluminescence properties of the three hostmaterials, blue, green, red, and white phosphorescent OLEDs (PhOLEDs) were fabricated and characterized. With the highest ET value, TDPA–TRZ can afford from blue to red phosphorescent emitters
Donor–σ–Acceptor Motifs: Thermally Activated Delayed Fluorescence Emitters with Dual Upconversion
作者:Yan Geng、Anthony D'Aleo、Ko Inada、Lin‐Song Cui、Jong Uk Kim、Hajime Nakanotani、Chihaya Adachi
DOI:10.1002/anie.201708876
日期:2017.12.22
organic emitters with a donor–σ–acceptor (D‐σ‐A) motif is presented. Owing to the weakly coupled D‐σ‐A intramolecular charge‐transfer state, a transition from the localized excited triplet state (3LE) and charge‐transfer triplet state (3CT) to the charge‐transfer singlet state (1CT) occurred with a small activation energy and high photoluminescence quantum efficiency. Two thermallyactivateddelayed fluorescence
POLYMER COMPOUND AND ORGANIC ELECTROLUMINESCENCE ELEMENT USING THE SAME
申请人:Toba Masahiko
公开号:US20100327738A1
公开(公告)日:2010-12-30
The present invention provides a polymer material capable of preparing organic EL elements having low driving voltage and high durability. The polymer compound of the present invention includes a constituting unit derived from a monomer represented by the formula (1);
(in the formula (1), each of A
1
's is independently a condensed polycyclic aromatic group optionally having a heteroatom as a ring-constituting atom; the condensed polycyclic aromatic group links to A
2
at the meta position to the bonding position of the ring represented by the following formula;
each of A
2
's is independently a six-membered ring aromatic group optionally having a heteroatom as a ring-constituting atom; at least one of A
1
and A
2
has a substituent having a polymerizable functional group; at least one of X's is a nitrogen atom, and n's are independently 1 or 2).