Numerical Analysis and Optimization of a Hybrid Layer Structure for Triplet-Triplet Fusion Mechanism in Organic Light-Emitting Diodes
Journal
ADVANCED THEORY AND SIMULATIONS
Journal Volume
6
Journal Issue
2
Date Issued
2023
Abstract
In this study, a steady state and time-dependent exciton diffusion model including singlet and triplet excitons coupled with a modified Poisson and drift-diffusion solver to explain the mechanism of hyper triplet–triplet fusion (TTF) organic light-emitting diodes (OLEDs) is developed. Using this modified simulator, various characteristics of OLEDs, including the current-voltage curve, internal quantum efficiency, transient spectrum, and electric profile are demonstrated. This solver can also be used to explain the mechanism of hyper-TTF-OLEDs and analyze the loss from different exciton mechanisms. Furthermore, we perform additional optimization of hyper-TTF-OLEDs that increases the internal quantum efficiency by ≈33% (from 29% to 40%).
Subjects
device modeling; organic light-emitting diodes; triplet- triplet fusion; ACTIVATED DELAYED FLUORESCENCE; CHARGE-TRANSPORT; EFFICIENCY; MOBILITY
SDGs
Publisher
WILEY-V C H VERLAG GMBH
Type
journal article