Hot Exciton versus Hot Exciplex TADF Mechanism – Effect of the Donor‐Acceptor Functionalization Pattern on Anthracene‐based Emitters

Hot exciton emitters based on 9,10‐substituted anthracenes are a well‐investigated class of molecules featuring thermally activated delayed fluorescence (TADF). TADF converts triplet excitons into singlet excitons and improves the internal quantum efficiency of electroluminescent devices to performa...

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Bibliographic Details
Published in:ChemPhotoChem 2024-11, Vol.8 (11), p.n/a
Main Authors: Majer, Felix, Roß, Lars, Respondek, A. Lennart, Bannwarth, Christoph, Kuehne, Alexander J. C.
Format: Article
Language:English
Subjects:
hot exciplexes
hot excitons
organic electronics
substituted anthracenes
TADF
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Summary:Hot exciton emitters based on 9,10‐substituted anthracenes are a well‐investigated class of molecules featuring thermally activated delayed fluorescence (TADF). TADF converts triplet excitons into singlet excitons and improves the internal quantum efficiency of electroluminescent devices to performance beyond the limit of spin‐statistics of conventional emitters. In this paper, we compare different 1,8‐functionalized donor/acceptor‐substituted anthracenes and compare these to established 9,10‐functionalized hot exciton emitters. Interestingly, our new 1,8‐substituted anthracenes make use of a beneficial hot exciplex pathway, resulting in improved emission characteristics and higher photoluminescence quantum yield. Which TADF mechanism is better – hot excitons or hot exciplexes? In this study, we compare the two hot‐state exciton conversion mechanisms. We compared three hot exciton to and three hot exciplex TADF molecules in their emission states, photoluminescence quantum yields, and potential performance for triplet to singlet conversion, to gain insight into the different mechanisms and their efficiency.
ISSN:2367-0932
2367-0932
DOI:10.1002/cptc.202400141