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

Author:

Majer Felix1ORCID,Roß Lars2,Respondek A. Lennart1,Bannwarth Christoph2ORCID,Kuehne Alexander J. C.1ORCID

Affiliation:

1. Institute of Organic and Macromolecular Chemistry Ulm University Albert-Einstein-Allee 11 89081 Ulm Germany

2. Institute of Physical Chemistry RWTH Aachen University Landoltweg 2 52074 Aachen Germany

Abstract

AbstractHot 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.

Publisher

Wiley

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