Highly Efficient OLEDs

7TADF Kinetics and Data Analysis in Photoluminescence and in Electroluminescence

Tiago Palmeira and Mário N. Berberan‐Santos

Universidade de Lisboa, CQFM‐IN and IBB – Institute of Bioengineering and Biosciences, Instituto Superior Técnico, 1049‐001 Lisboa, Portugal

7.1 TADF Kinetics

7.1.1 Introduction

The basic model for thermally activated delayed fluorescence (TADF) kinetics in the condensed phases is a three‐state scheme, involving excited‐state interconversion between S₁ and T₁, with the ground state S₀ as the initial and final state (Scheme 7.1):where k_F and k_P are the radiative rate constants for fluorescence and phosphorescence, respectively, and are the internal conversion rate constant for S₁ → S₀ deactivation and the intersystem ...