Efficient Vacuum-Processed Light-Emitting Diodes Based on Carbene–Metal–Amides

Patrick J. Conaghan, S. Matthew Menke, Alexander S. Romanov, Saul T.E. Jones, Andrew J. Pearson, Emrys W. Evans, Manfred Bochmann, Neil C. Greenham, Dan Credgington

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75 Scopus citations


Efficient vacuum-processed organic light-emitting diodes are fabricated using a carbene–metal–amide material, CMA1. An electroluminescence (EL) external quantum efficiency of 23% is achieved in a host-free emissive layer comprising pure CMA1. Furthermore external quantum efficiencies of up to 26.9% are achieved in host–guest emissive layers. EL spectra are found to depend on both the emissive-layer doping concentration and the choice of host material, enabling tuning of emission color from mid-green (Commission Internationale de l'Éclairage co-ordinates [0.24, 0.46]) to sky blue ([0.22 0.35]) without changing dopant. This tuning is achieved without compromising luminescence efficiency (>80%) while maintaining a short radiative lifetime of triplets (
Original languageEnglish (US)
Pages (from-to)1802285
JournalAdvanced Materials
Issue number35
StatePublished - Jul 9 2018
Externally publishedYes

Bibliographical note

KAUST Repository Item: Exported on 2022-06-09
Acknowledgements: This work was supported by the Engineering and Physical Sciences Research Council (EPSRC, grant no. EP/M005143/1) and the European Research Council (ERC). P.J.C. acknowledges EPSRC for Ph.D. studentship funding and A.J.P. also acknowledges support from EPSRC (grant no. EP/M024873/1). S.M.M. acknowledges support from the KAUST Competitive Research Grant Program. M.B. is an ERC Advanced Investigator Award holder (Grant No. 338944-GOCAT). D.C. acknowledges the support from the Royal Society (grant nos. UF130278 and RG140472). The authors thank the Diamond Light Source for access to the I07 beamline (session SI7223-1) and for the help during the GIWAXS experiments. The authors thank Mojtaba Abdi-Jalebi for PDS measurements and Edoardo Ruggeri for the help with GIWAXS measurements. The data underlying this publication is available through the following web link: https://doi.org/10.17863/CAM.24419.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.


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