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
Levermore P
(2023)
9-2: TurboLED: Novel Pixel Design for Reduced Power Consumption and Expanded Color Gamut
in SID Symposium Digest of Technical Papers
Sudhakar P
(2023)
Azaborine as a Versatile Weak Donor for Thermally Activated Delayed Fluorescence.
in ACS applied materials & interfaces
Paredis S
(2023)
Balanced Energy Gaps as a Key Design Rule for Solution-Phase Organic Room Temperature Phosphorescence
in Chemistry - A European Journal
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
Xiaotian R
(2023)
Carbazole-Dendronized Luminescent Radicals
in Angewandte Chemie International Edition
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
(2023)
Conformational, Host, and Vibrational Effects Giving Rise to Dynamic TADF Behavior in the Through-Space Charge Transfer, Triptycene Bridged Acridine-Triazine Donor Acceptor TADF Molecule TpAT-tFFO.
in The journal of physical chemistry. C, Nanomaterials and interfaces
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
Sem S
(2022)
Determining non-radiative decay rates in TADF compounds using coupled transient and steady state optical data
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 |