Organic Thermally Activated Delayed Fluorescence Material with Strained Benzoguanidine Donor

Overview

Journal Beilstein J Org Chem

Specialty Chemistry

Date 2023 Sep 13

PMID 37701304

Authors

Alexander C Brannan

Elvie F P Beaumont

Nguyen Le Phuoc

George F S Whitehead

Mikko Linnolahti

Alexander S Romanov

Affiliations

Soon will be listed here.

Abstract

Organic thermally activated delayed fluorescence (TADF) materials have been widely investigated due to their impressive electronic properties and applied potential for the third generation of organic light-emitting diodes (OLED). We present organic TADF material () based on the strained benzoguanidine donor and compare it with the benchmark carbazole-based material (). Extended π-conjugation in material results in yellow-green luminescence at 512 nm with a fast radiative rate of 5.5 × 10 s and a photoluminescence quantum yield of 46% in methylcyclohexane solution. Such a nitrogen-rich material has a significantly stabilized highest occupied molecular orbital (HOMO) at -6.4 eV while the lowest unoccupied molecular orbital (LUMO) at -4.0 eV, indicating potential suitability for application as the electron transport layer or TADF class III emitter in OLEDs.

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