Chiral Spiro‐Axis Induced Blue Thermally Activated Delayed Fluorescence Material for Efficient Circularly Polarized OLEDs with Low Efficiency Roll‐off

2021 ◽  
Author(s):  
Yi-Pin Zhang ◽  
Xiao Liang ◽  
Xu-Feng Luo ◽  
Shi-Quan Song ◽  
Si Li ◽  
...  
Keyword(s):  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Circularly Polarized ◽  
Thermally Activated ◽  
Low Efficiency ◽  
Fluorescence Material

scholarly journals Stable green phosphorescence organic light-emitting diodes with low efficiency roll-off using a novel bipolar thermally activated delayed fluorescence material as host

2017 ◽  
Vol 8 (2) ◽  
pp. 1259-1268 ◽  
Author(s):  
Kunping Guo ◽  
Hedan Wang ◽  
Zixing Wang ◽  
Changfeng Si ◽  
Cuiyun Peng ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Organic Light ◽  
Low Efficiency ◽  
Fluorescence Material

A bipolar host with TADF properties is realized, endowing green PhOLEDs with a twentyfold lifetime improvement.

Thermally activated delayed fluorescence with circularly polarized luminescence characteristics

2015 ◽  
Vol 51 (68) ◽  
pp. 13268-13271 ◽  
Author(s):  
Takuro Imagawa ◽  
Shuzo Hirata ◽  
Kenro Totani ◽  
Toshiyuki Watanabe ◽  
Martin Vacha
Keyword(s):  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Circularly Polarized ◽  
Metal Free ◽  
Thermally Activated ◽  
Sign Inversion ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
Large Conformational Change ◽  
Luminescence Characteristics

A metal-free aromatic compound exhibiting thermally activated delayed fluorescence as well as circularly polarized luminescence (CPL) with dissymmetry factors of 10−3 is reported. This compound shows a sign inversion between its circular dichroism signal and CPL, which is caused by a large conformational change upon photoexcitation.

Controlling the exciton lifetime of blue thermally activated delayed fluorescence emitters using a heteroatom-containing pyridoindole donor moiety

2017 ◽  
Vol 4 (4) ◽  
pp. 619-624 ◽  
Author(s):  
Gyeong Heon Kim ◽  
Raju Lampande ◽  
Joon Beom Im ◽  
Jung Min Lee ◽  
Ju Young Lee ◽  
...  
Keyword(s):  
Molecular Design ◽  
Delayed Fluorescence ◽  
Energy Splitting ◽  
Triplet Energy ◽  
High Quantum Efficiency ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Exciton Lifetime ◽  
Low Efficiency ◽  
Donor Moiety

We demonstrate a promising molecular design approach to achieve short exciton lifetime, small singlet and triplet energy splitting and high photoluminescence quantum yield in thermally activated delayed fluorescence emitters for high quantum efficiency and low efficiency roll-off characteristics in OLEDs.

Sign in / Sign up

Export Citation Format

Share Document