scholarly journals Axial and helical thermally activated delayed fluorescence bicarbazole emitters: Opposite modulation of circularly polarized luminescence through intramolecular charge-transfer dynamics

2021 ◽  
Author(s):  
Patthira Sumsalee ◽  
Laura Abella ◽  
Thierry Roisnel ◽  
Sabrina Lebrequier ◽  
Gregory Pieters ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Intramolecular Charge Transfer ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Circularly Polarized ◽  
Thermally Activated ◽  
High Interest ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence ◽  
Charge Transfer Dynamics

The rationalization of the molecular parameters that influences the intensity and sign of circularly polarized luminescence (CPL) for chiral emitters is a challenging task and remains of high interest for...

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.

scholarly journals Controlling the Thermally Activated Delayed Fluorescence of Axially Chiral Organic Emitters and Their Racemate for Information Encryption

2021 ◽  
Author(s):  
Bingjia Xu ◽  
Zicun Song ◽  
Minmin Zhang ◽  
Qingqing Zhang ◽  
Long Jiang ◽  
...  
Keyword(s):  
Delayed Fluorescence ◽  
One Pot ◽  
Thermally Activated Delayed Fluorescence ◽  
Circularly Polarized ◽  
Thermally Activated ◽  
Axially Chiral ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

A pair of axially chiral organic enantiomers were facilely prepared through a one-pot sequential synthesis. They exhibit circularly polarized luminescence activities and have thermally activated delayed fluorescence (TADF) and aggregation-induced...

scholarly journals Turn on of sky-blue thermally activated delayed fluorescence and circularly polarized luminescence (CPL) via increased torsion by a bulky carbazolophane donor

2019 ◽  
Vol 10 (27) ◽  
pp. 6689-6696 ◽  
Author(s):  
Nidhi Sharma ◽  
Eduard Spuling ◽  
Cornelia M. Mattern ◽  
Wenbo Li ◽  
Olaf Fuhr ◽  
...  
Keyword(s):  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Circularly Polarized ◽  
Thermally Activated ◽  
Turn On ◽  
Circularly Polarized Luminescence ◽  
Polarized Luminescence

The carbazolophane (Czp) donor unit is introduced to the design pool of donors in TADF emitters.

A red thermally activated delayed fluorescence emitter employing dipyridophenazine with a gradient multi-inductive effect to improve radiation efficiency

2019 ◽  
Vol 7 (25) ◽  
pp. 7525-7530 ◽  
Author(s):  
Huiqin Wang ◽  
Bingjie Zhao ◽  
Peng Ma ◽  
Zhe Li ◽  
Xinyu Wang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Inductive Effect ◽  
Intramolecular Charge Transfer ◽  
Radiative Transition ◽  
Delayed Fluorescence ◽  
Radiation Efficiency ◽  
Quantum Yields ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Electro Luminescence

Red TADF emitter oTPA-DPPZ employs dipyridophenazine with gradient multi-inductive effect as acceptor, which enhances intramolecular charge transfer and radiative transition, resulting photo- and electro-luminescence quantum yields of 75% and 18.5%.

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