Charge and exciton dynamics of OLEDs under high voltage nanosecond pulse: towards injection lasing

V. Ahmad; J. Sobus; M. Greenberg; A. Shukla; B. Philippa; A. Pivrikas; G. Vamvounis; R. White; S-C Lo; E.B. Namdas

doi:10.1038/s41467-020-18094-4

Back

Charge and exciton dynamics of OLEDs under high voltage nanosecond pulse: towards injection lasing

Journal article

Open access

Peer reviewed

Charge and exciton dynamics of OLEDs under high voltage nanosecond pulse: towards injection lasing

V. Ahmad, J. Sobus, M. Greenberg, A. Shukla, B. Philippa, A. Pivrikas, G. Vamvounis, R. White, S-C Lo and E.B. Namdas

Nature Communications, Vol.11(1), Art.4310

2020

DOI: https://doi.org/10.1038/s41467-020-18094-4

Files and links (2)

pdf

OLEDs.pdfDownload View

Published (Version of Record) Open Access

url

Free to Read *No subscription requiredView

Abstract

Electrical pumping of organic semiconductor devices involves charge injection, transport, device on/off dynamics, exciton formation and annihilation processes. A comprehensive model analysing those entwined processes together is most helpful in determining the dominating loss pathways. In this paper, we report experimental and theoretical results of Super Yellow (Poly(p-phenylene vinylene) co-polymer) organic light emitting diodes operating at high current density under high voltage nanosecond pulses. We demonstrate complete exciton and charge carrier dynamics of devices, starting from charge injection to light emission, in a time scale spanning from the sub-ns to microsecond region, and compare results with optical pumping. The experimental data is accurately replicated by simulation, which provides a robust test platform for any organic materials. The universality of our model is successfully demonstrated by its application to three other laser active materials. The findings provide a tool to narrow the search for material and device designs for injection lasing.

Details

Title: Charge and exciton dynamics of OLEDs under high voltage nanosecond pulse: towards injection lasing
Authors/Creators: V. Ahmad (Author/Creator) - The University of Queensland
J. Sobus (Author/Creator) - The University of Queensland
M. Greenberg (Author/Creator) - James Cook University
A. Shukla (Author/Creator) - The University of Queensland
B. Philippa (Author/Creator) - James Cook University
A. Pivrikas (Author/Creator) - Murdoch University
G. Vamvounis (Author/Creator) - James Cook University
R. White (Author/Creator) - James Cook University
S-C Lo (Author/Creator) - The University of Queensland
E.B. Namdas (Author/Creator) - The University of Queensland
Publication Details: Nature Communications, Vol.11(1), Art.4310
Publisher: Springer Nature
Identifiers: 991005544348707891
Copyright: © 2020 The Authors
Murdoch Affiliation: School of Engineering and Information Technology
Language: English
Resource Type: Journal article

UN Sustainable Development Goals (SDGs)

This output has contributed to the advancement of the following goals:

Source: InCites

Metrics

19 File views/ downloads

83 Record Views

50 Times Cited - Web of Science

InCites Highlights

These are selected metrics from InCites Benchmarking & Analytics tool, related to this output

Collaboration types: Domestic collaboration
Citation topics: 2 Chemistry; 2.114 Organic Semiconductors; 2.114.321 OLEDs
Web Of Science research areas: Physics, Applied
ESI research areas: Physics