Efficient blue thermally activated delayed fluorescent emitters based on a boranaphtho[3,2,1-de]anthracene acceptor

2021 ◽  
Author(s):  
Ranran Pei ◽  
He Liu ◽  
Changjiang Zhou ◽  
Jingsheng Miao ◽  
Chuluo Yang
Keyword(s):  
Thermally Activated ◽  
Cie Coordinates ◽  
Boron Acceptor

Efficient blue thermally activated delayed fluorescent emitters based on organic boron-acceptor are developed with high external quantum efficiencies and finely tuned CIE coordinates.

Highly efficient blue thermally activated delayed fluorescence organic light emitting diodes based on tercarbazole donor and boron acceptor dyads

2020 ◽  
Vol 8 (7) ◽  
pp. 2272-2279 ◽  
Author(s):  
Durai Karthik ◽  
Dae Hyun Ahn ◽  
Jae Hong Ryu ◽  
Hyuna Lee ◽  
Jee Hyun Maeng ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Highly Efficient ◽  
Organic Light ◽  
Boron Acceptor

Two new blue TADF emitters, 3CzTB and M3CzB, for application in highly efficient organic light-emitting diodes are reported.

26‐3: Highly Efficient Boron Acceptor Based Blue Thermally Activated Delayed Fluorescent Emitter

2019 ◽  
Vol 50 (1) ◽  
pp. 363-366
Author(s):  
Jee Hyun Maeng ◽  
Dae Hyun Ahn ◽  
Hyuna Lee ◽  
Ju Young Lee ◽  
Jang Hyuk Kwon
Keyword(s):  
Thermally Activated ◽  
Highly Efficient ◽  
Boron Acceptor

A spiro-silafluorene–phenazasiline donor-based efficient blue thermally activated delayed fluorescence emitter and its host-dependent device characteristics

2019 ◽  
Vol 7 (14) ◽  
pp. 4191-4198 ◽  
Author(s):  
Seung-Je Woo ◽  
Youheon Kim ◽  
Yun-Hi Kim ◽  
Soon-Ki Kwon ◽  
Jang-Joo Kim
Keyword(s):  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Cie Coordinates

A blue TADF emitter based on a spiro-connected silafluorene–phenazasiline donor with an EQE of 20.6% and CIE coordinates of (0.150, 0.184).

Efficient deep-blue organic light-emitting diodes employing difluoroboron-enabled thermally activated delayed fluorescence emitters

2020 ◽  
Vol 8 (48) ◽  
pp. 17464-17473
Author(s):  
Guijie Li ◽  
Feng Zhan ◽  
Weiwei Lou ◽  
Dan Wang ◽  
Chao Deng ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Design And Development ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Deep Blue ◽  
Organic Light ◽  
Cie Coordinates

The design and development of efficient emitters for deep-blue OLED with CIEy < 0.10 remains a challenge. A new D–π–A-BF2-type TADF emitter BF2-DMCz was developed, and the BF2-DMCz-doped deep-blue OLED achieved a peak EQE of 8.4% with CIE coordinates of (0.149, 0.083).

Thermally activated flow of β-titanium and β-titanium-hydrogen alloys

2000 ◽  
Vol 80 (12) ◽  
pp. 2813-2825
Author(s):  
O. N. Senkov, J. J. Jonas, F. H. Froes
Keyword(s):  
Thermally Activated

Solvent Dependence of Structural Dynamics and Spin-flip Processes in 3,4,5-tri(9H-carbazole-9-yl)benzonitrile (ortho-3CzBN)

2020 ◽  
Author(s):  
Masaki Saigo ◽  
Kiyoshi Miyata ◽  
Hajime Nakanotani ◽  
Chihaya Adachi ◽  
Ken Onda
Keyword(s):  
Dft Calculations ◽  
Excited States ◽  
Structural Changes ◽  
Photophysical Properties ◽  
Delayed Fluorescence ◽  
Time Resolved ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Solvent Dependence ◽  
Acetonitrile Solutions

We have investigated the solvent-dependence of structural changes along with intersystem crossing of a thermally activated delayed fluorescence (TADF) molecule, 3,4,5-tri(9H-carbazole-9-yl)benzonitrile (o-3CzBN), in toluene, tetrahydrofuran, and acetonitrile solutions using time-resolved infrared (TR-IR) spectroscopy and DFT calculations. We found that the geometries of the S1 and T1 states are very similar in all solvents though the photophysical properties mostly depend on the solvent. In addition, the time-dependent DFT calculations based on these geometries suggested that the thermally activated delayed fluorescence process of o-3CzBN is governed more by the higher-lying excited states than by the structural changes in the excited states.<br>

Mass spectrometric study of allyl radical, allyl bromide and 1,5-hexadiene interactions with oxides; Cobalt suboxide Co3O4

1979 ◽  
Vol 44 (7) ◽  
pp. 2009-2014 ◽  
Author(s):  
Jana Nováková ◽  
Zdeněk Dolejšek
Keyword(s):  
Room Temperature ◽  
Allyl Bromide ◽  
Catalytic Properties ◽  
Mass Spectrometric Study ◽  
Spectrometric Study ◽  
Flow Conditions ◽  
Allyl Radical ◽  
Knudsen Flow ◽  
Thermally Activated ◽  
Radical Interaction

Products of (a) allyl radical interaction with unheated Co3O4, (b) thermally activated 1,5-hexadiene or thermally activated allyl bromide with unheated Co3O4, (c) moderately heated Co3O4 with unheated 1,5-hexadiene or allyl bromide were studied under Knudsen flow conditions. Cobalt suboxide Co3O4, a typical catalyst of deep oxidations yielded acrolein in reaction with allyl radicals as early as at the room temperature of the catalyst. A similar acrolein formation was also observed in the allyl radical interaction with other oxides exhibiting different catalytic properties. It appears that acrolein is in general the primary product of the allyl radical interaction with the oxides. The results are discussed and compared with previous data obtained with MoO3.

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