rISC - the game of strategic molecular design for high efficiency OLEDs
Lead Research Organisation:
Durham University
Department Name: Physics
Abstract
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Organisations
Publications
Hempe M
(2021)
Vibrational Damping Reveals Vibronic Coupling in Thermally Activated Delayed Fluorescence Materials.
in Chemistry of materials : a publication of the American Chemical Society
Wright IA
(2021)
Conformational Dependence of Triplet Energies in Rotationally Hindered N- and S-Heterocyclic Dimers: New Design and Measurement Rules for High Triplet Energy OLED Host Materials.
in Chemistry (Weinheim an der Bergstrasse, Germany)
Miranda-Salinas H
(2021)
Controlling through-space and through-bond intramolecular charge transfer in bridged D-D'-A TADF emitters
in Journal of Materials Chemistry C
Phan Huu DKA
(2022)
Thermally Activated Delayed Fluorescence: Polarity, Rigidity, and Disorder in Condensed Phases.
in Journal of the American Chemical Society
Franca L
(2022)
Spiro donor-acceptor TADF emitters: naked TADF free from inhomogeneity caused by donor acceptor bridge bond disorder. Fast rISC and invariant photophysics in solid state hosts
in Journal of Materials Chemistry C
Kelly D
(2022)
Laplace Transform Fitting as a Tool To Uncover Distributions of Reverse Intersystem Crossing Rates in TADF Systems.
in The journal of physical chemistry letters
Monkman A
(2022)
Why Do We Still Need a Stable Long Lifetime Deep Blue OLED Emitter?
in ACS applied materials & interfaces
Paredis S
(2022)
Bridge control of photophysical properties in benzothiazole-phenoxazine emitters - from thermally activated delayed fluorescence to room temperature phosphorescence
in Journal of Materials Chemistry C
Description | From initial work we had shown that uncontrolled molecular conformations lead to very inhomogeneous rates of reverse intersystem crossing which causes fast and slow triplet harvesting leading to poor efficiency and major problems on OLED devices. By using molecules that have locked configurations we remove this problem and can now demonstrate far more efficent OLEDs with stable colour emission and longer lifetime. Two ways to achieve this have been found. This is a major step forward for TADF OLEDs. |
Exploitation Route | We are working with two leading major International OLED companies and aim to introduce these new materials into our work with them to take our findings further. |
Sectors | Electronics |