Luminescence color alteration induced by trapped solvent molecules in crystals of tetrahedral gold(i) complexes: near-unity luminescence mixed with thermally activated delayed fluorescence and phosphorescence

2019 ◽  
Vol 48 (25) ◽  
pp. 9094-9103 ◽  
Author(s):  
Masahisa Osawa ◽  
Hiroto Yamayoshi ◽  
Mikio Hoshino ◽  
Yuya Tanaka ◽  
Munetaka Akita
Keyword(s):  
Crystal Lattice ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Emission Color ◽  
Color Alteration ◽  
Solvent Molecules ◽  
Fluorescence And Phosphorescence ◽  
Luminescence Color

Emission color alteration caused by captured solvent molecules in the crystal lattice of tetrahedral gold(i) complexes.

Mechanochromic luminescent materials of bimetallic Cu(i) complexes showing thermally activated delayed fluorescence

2020 ◽  
Vol 8 (45) ◽  
pp. 16160-16167
Author(s):  
Xing-Wei Chen ◽  
Li-Hua He ◽  
Peng Ju ◽  
Jing-Lin Chen ◽  
Sui-Jun Liu ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Delayed Fluorescence ◽  
Luminescent Materials ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Luminescence Color

Reversible mechanochromism is related to the breaking and restoring of hydrogen-bonding and luminescence color is tunable via the substituent.

scholarly journals Lock-and-Key Exciplexes for Thermally Activated Delayed Fluorescence

2020 ◽  
Vol 02 (01) ◽  
pp. 001-010
Author(s):  
Constantin-Christian A. Voll ◽  
Georgios Markopoulos ◽  
Tony C. Wu ◽  
Matthew Welborn ◽  
Jens U. Engelhart ◽  
...  
Keyword(s):  
Density Functional ◽  
Materials Science ◽  
Visible Spectrum ◽  
Density Functional Theory Calculations ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting Devices ◽  
Thermally Activated ◽  
Emission Color ◽  
Exciplex Emission

We combine synthetic supramolecular chemistry and materials science to develop novel exciplexes for thermally activated delayed fluorescence. Our approach starts from a bowl-shaped acceptor molecule for which we synthesize tailor-made donors that bind in a lock-and-key fashion. The donor design is guided by extensive density functional theory calculations of three independent donor families. The investigation of a large number of custom-synthesized donors allows us to derive empirical relationships for the prediction of the exciplex emission color. Incorporated within organic light-emitting devices, the lock-and-key exciplexes yield external quantum efficiencies of up to 5.4%, with potentially tunable emission color across the blue and green visible spectrum.

Two-channel emission controlled by a conjugation valve for the color switching of thermally activated delayed fluorescence emission

2019 ◽  
Vol 7 (32) ◽  
pp. 9908-9916 ◽  
Author(s):  
Rajendra Kumar Konidena ◽  
Kyung Hyung Lee ◽  
Jun Yeob Lee
Keyword(s):  
Molecular Design ◽  
Fluorescence Emission ◽  
Delayed Fluorescence ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Emission Color ◽  
Valve Structure ◽  
Color Control ◽  
Color Switching

Herein, we demonstrate the first example of molecular design concept combining the two channel emission process and conjugation managing valve structure for emission color control and high light-emitting efficiency of the TADF emitters.

scholarly journals Fluorinated Dibenzo[a,c]-phenazine-Based Green to Red Thermally Activated Delayed Fluorescent OLED Emitters

2021 ◽  
Author(s):  
Gloria Hong ◽  
Changfeng Si ◽  
Abhishek Kumar Gupta ◽  
Claudia Bizzarri ◽  
Martin Nieger ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Organic Light ◽  
Emission Color ◽  
Donor And Acceptor ◽  
Judicious Choice

Purely organic thermally activated delayed fluorescence (TADF) emitting materials for organic light-emitting diodes (OLEDs) enable a facile method to modulate the emission color through judicious choice of donor and acceptor...

Reducing lifetime in Cu(i) complexes with thermally activated delayed fluorescence and phosphorescence promoted by chalcogenolate–diimine ligands

2020 ◽  
Vol 8 (41) ◽  
pp. 14595-14604
Author(s):  
Giliandro Farias ◽  
Cristian A. M. Salla ◽  
Renata S. Heying ◽  
Adailton J. Bortoluzzi ◽  
Sergio F. Curcio ◽  
...  
Keyword(s):  
Heavy Atom ◽  
Delayed Fluorescence ◽  
Spin Orbit Coupling ◽  
Matrix Elements ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Diimine Ligands ◽  
Photoluminescence Lifetime ◽  
Atom Effect ◽  
Fluorescence And Phosphorescence

Cu(i) complexes without the expected heavy atom effect to enhance the spin–orbit coupling matrix elements, but with reduced photoluminescence lifetime.

The design, synthesis and performance of thermally activated delayed fluorescence macromolecules

2020 ◽  
Vol 11 (9) ◽  
pp. 1555-1571 ◽  
Author(s):  
Tingcong Jiang ◽  
Yuchao Liu ◽  
Zhongjie Ren ◽  
Shouke Yan
Keyword(s):  
Delayed Fluorescence ◽  
Solution Processed ◽  
Design Synthesis ◽  
Thermally Activated Delayed Fluorescence ◽  
Thermally Activated ◽  
Emission Color ◽  
And Performance ◽  
Typical Solution

The design, synthesis and performance of thermally activated delayed fluorescence macromolecules are summarized, and the typical solution-processed polymeric and dendritic emitters are also organized herein as a function of EL emission color.

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