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Silver Grid Transparent Conducting Electrodes for Organic Light Emitting Diodes

Sam, FLM, Razali, MA, Jayawardena, KDGI, Mills, CA, Rozanski, LJ, Beliatis, MJ and Silva, SRP (2014) Silver Grid Transparent Conducting Electrodes for Organic Light Emitting Diodes Organic Electronics, 15 (12). pp. 3492-3500.

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Abstract

Polymer organic light emitting diodes (OLEDs) were fabricated using thin silver hexagonal grids replacing indium tin oxide (ITO) as the transparent conducting electrodes (TCE). Previous literature has assumed that thick metal grids (several hundred nanometres thick) with a lower sheet resistance (< 10 Ω/□) and a similar light transmission (> 80 %) compared to thinner grids would lead to OLEDs with better performance than when thinner metal grid lines are used. This assumption is critically examined using OLEDs on various metal grids with different thicknesses and studying their performances. The experimental results show that a 20 nm thick silver grid TCE resulted in more efficient OLEDs with higher luminance (10 cd/A and 1460 cd/m2 at 6.5 V) than a 111 nm thick silver grid TCE (5 cd/A and 159 cd/m2 at 6.5 V). Furthermore, the 20 nm thick silver grid OLED has a higher luminous efficiency than the ITO OLED (6 cd/A and 1540 cd/m2 at 6.5 V) at low voltages. The data shows that thinner metal grid TCEs (about 20 nm) make the most efficient OLEDs, contrary to previous expectations.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute > Nano-Electronics Centre
Authors :
AuthorsEmailORCID
Sam, FLMUNSPECIFIEDUNSPECIFIED
Razali, MAUNSPECIFIEDUNSPECIFIED
Jayawardena, KDGIUNSPECIFIEDUNSPECIFIED
Mills, CAUNSPECIFIEDUNSPECIFIED
Rozanski, LJUNSPECIFIEDUNSPECIFIED
Beliatis, MJUNSPECIFIEDUNSPECIFIED
Silva, SRPUNSPECIFIEDUNSPECIFIED
Date : 24 September 2014
Identification Number : 10.1016/j.orgel.2014.09.036
Uncontrolled Keywords : Metal grids, Transparent Conducting Electrodes, Indium Tin Oxide, Organic Light Emitting Diode
Related URLs :
Additional Information : NOTICE: this is the author’s version of a work that was accepted for publication in Organic Electronics. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Organic Electronics, 15(12), September 2014, DOI 10.1016/j.orgel.2014.09.0361.
Depositing User : Symplectic Elements
Date Deposited : 22 Oct 2014 10:19
Last Modified : 22 Oct 2014 13:33
URI: http://epubs.surrey.ac.uk/id/eprint/806386

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