St Andrews Research Repository

St Andrews University Home
View Item 
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  •   St Andrews Research Repository
  • University of St Andrews Research
  • University of St Andrews Research
  • University of St Andrews Research
  • View Item
  • Register / Login
JavaScript is disabled for your browser. Some features of this site may not work without it.

Monothiatruxene-based, solution-processed green, sky-blue, and deep-blue organic light-emitting diodes with efficiencies beyond 5% limit

Thumbnail
View/Open
adfm201807572_for_Pure.pdf (703.8Kb)
Date
08/02/2019
Author
Maciejczyk, Michal R.
Zhang, Shuyu
Hedley, Gordon J.
Robertson, Neil
Samuel, Ifor D. W.
Pietraszkiewicz, Marek
Funder
EPSRC
Grant ID
N/A
Keywords
Blue emitters
Donor–acceptor systems
Organic light-emitting diodes (OLEDs)
Solution-processed
Truxenes
QC Physics
DAS
Metadata
Show full item record
Abstract
The development of blue materials with good efficiency, even at high brightness, with excellent color purity, simple processing, and high thermal stability assuring adequate device lifetime is an important remaining challenge for organic light‐emitting didoes (OLEDs) in displays and lightning applications. Furthermore, these various features are typically mutually exclusive in practice. Herein, four novel green and blue light‐emitting materials based on a monothiatruxene core are reported together with their photophysical and thermal properties, and performance in solution‐processed OLEDs. The materials show excellent thermal properties with high glass transition temperatures ranging from 171 to 336 °C and decomposition temperatures from 352 to 442 °C. High external quantum efficiencies of 3.7% for a deep‐blue emitter with CIE color co‐ordinates (0.16, 0.09) and 7% for green emitter with color co‐ordinates (0.22, 0.40) are achieved at 100 cd m−2. The efficiencies observed are exceptionally high for fluorescent materials with photoluminescence quantum yields of 24% and 62%, respectively. The performance at higher brightness is very good with only 38% and 17% efficiency roll‐offs at 1000 cd m−2. The results indicate that utilization of this unique molecular design is promising for efficient deep‐blue highly stable and soluble light‐emitting materials.
Citation
Maciejczyk , M R , Zhang , S , Hedley , G J , Robertson , N , Samuel , I D W & Pietraszkiewicz , M 2019 , ' Monothiatruxene-based, solution-processed green, sky-blue, and deep-blue organic light-emitting diodes with efficiencies beyond 5% limit ' , Advanced Functional Materials , vol. 29 , no. 6 , 1807572 . https://doi.org/10.1002/adfm.201807572
Publication
Advanced Functional Materials
Status
Peer reviewed
DOI
https://doi.org/10.1002/adfm.201807572
ISSN
1616-301X
Type
Journal article
Rights
© 2018, WILEY-VCH Verlag GmbH & Co. KGaA. This work has been made available online in accordance with the publisher's policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1002/adfm.201807572
Description
The authors thank the Mazowieckie voivodeship, cofinanced with the European Union funds by the European Social Fund and European Union's Horizon 2020 Research and Innovation Programme H2020‐MSCA‐IF‐2014‐659237 for financial support. The authors thank Dr. Gary Nichol for the crystallographic data collection and refinement; The University of Edinburgh for funding the diffractometer purchase. I.D.W.S. acknowledges support from a Royal Society Wolfson Research Merit Award and from the Engineering and Physical Sciences Research Council (grant EP/J009016/1).
Collections
  • University of St Andrews Research
URL
https://www.research.ed.ac.uk/portal/en/publications/monothiatruxenebased-solutionprocessed-green-skyblue-and-deepblue-organic-lightemitting-diodes-with-efficiencies-beyond-5-limit(7a7a179f-cdf9-432a-b0fc-d79ecc69011a).html
URI
http://hdl.handle.net/10023/19144

Items in the St Andrews Research Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

Advanced Search

Browse

All of RepositoryCommunities & CollectionsBy Issue DateNamesTitlesSubjectsClassificationTypeFunderThis CollectionBy Issue DateNamesTitlesSubjectsClassificationTypeFunder

My Account

Login

Open Access

To find out how you can benefit from open access to research, see our library web pages and Open Access blog. For open access help contact: openaccess@st-andrews.ac.uk.

Accessibility

Read our Accessibility statement.

How to submit research papers

The full text of research papers can be submitted to the repository via Pure, the University's research information system. For help see our guide: How to deposit in Pure.

Electronic thesis deposit

Help with deposit.

Repository help

For repository help contact: Digital-Repository@st-andrews.ac.uk.

Give Feedback

Cookie policy

This site may use cookies. Please see Terms and Conditions.

Usage statistics

COUNTER-compliant statistics on downloads from the repository are available from the IRUS-UK Service. Contact us for information.

© University of St Andrews Library

University of St Andrews is a charity registered in Scotland, No SC013532.

  • Facebook
  • Twitter