AZO/Ag/AZO anode for resonant cavity red, blue, and yellow organic light emitting diodes

Gentle, A. R., Yambem, S. D., Burn, P. L., Meredith, P. and Smith, G. B. (2016) AZO/Ag/AZO anode for resonant cavity red, blue, and yellow organic light emitting diodes. Journal of Applied Physics, 119 24: . doi:10.1063/1.4954689

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Author Gentle, A. R.
Yambem, S. D.
Burn, P. L.
Meredith, P.
Smith, G. B.
Title AZO/Ag/AZO anode for resonant cavity red, blue, and yellow organic light emitting diodes
Journal name Journal of Applied Physics   Check publisher's open access policy
ISSN 1089-7550
Publication date 2016-06-28
Year available 2016
Sub-type Article (original research)
DOI 10.1063/1.4954689
Open Access Status File (Publisher version)
Volume 119
Issue 24
Total pages 8
Place of publication Melville, NY, United States
Publisher A I P Publishing
Collection year 2017
Language eng
Abstract Indium tin oxide (ITO) is the transparent electrode of choice for organic light-emitting diodes (OLEDs). Replacing ITO for cost and performance reasons is a major drive across optoelectronics. In this work, we show that changing the transparent electrode on red, blue, and yellow OLEDs from ITO to a multilayer buffered aluminium zinc oxide/silver/aluminium zinc oxide (AZO/Ag/AZO) substantially enhances total output intensity, with better control of colour, its constancy, and intensity over the full exit hemisphere. The thin Ag containing layer induces a resonant cavity optical response of the complete device. This is tuned to the emission spectra of the emissive material while minimizing internally trapped light. A complete set of spectral intensity data is presented across the full exit hemisphere for each electrode type and each OLED colour. Emission zone modelling of output spectra at a wide range of exit angles to the normal was in excellent agreement with the experimental data and hence could, in principle, be used to check and adjust production settings. These multilayer transparent electrodes show significant potential for both eliminating indium from OLEDs and spectrally shaping the emission.
Keyword Indium tin oxide (ITO)
Organic light-emitting diodes (OLEDs)
Aluminium zinc oxide/silver/aluminium zinc oxide
Spectral output
Organic photovoltaic (OPV)
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
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School of Chemistry and Molecular Biosciences
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