Zhao, Y, Yun, F, Huang, Y ORCID: 0000-0001-7774-1024, Wu, Z, Li, Y, Jiao, B, Feng, L, Li, S, Ding, W and Zhang, Y
(2016)
Efficiency roll-off suppression in organic light-emitting diodes using size-tunable bimetallic bowtie nanoantennas at high current densities.
APPLIED PHYSICS LETTERS, 109 (1).
013303-013303.
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Diodes Zhao APL.pdf - Author Accepted Manuscript Download (1MB) |
Abstract
Size-tunable bimetallic bowtie nanoantennas have been utilized to suppress the efficiency roll-off characteristics in organic light-emitting diodes (OLEDs) using both the numerical and experimental approaches. The resonant range can be widened by the strong dual-atomic couplings in bimetallic bowtie nanoantennas. Compared with the green OLED with conventional bowtie nanoantennas at a high current density of 800 mA/cm2, the measured efficiency roll-off ratio of the OLED with size-modulated bowtie nanoantennas is decreased from 53.2% to 41.8%, and the measured current efficiency is enhanced by 29.9%. When the size-modulated bowtie nanoantennas are utilized in blue phosphorescent OLEDs, the experimental roll-off ratio is suppressed from 43.6% to 25.9% at 250 mA/cm2, and the measured current efficiency is also enhanced significantly. It is proposed that the efficiency roll-off suppression is mainly related to the enhanced localized surface plasmon effect, which leads to a shorter radiative lifetime.
Item Type: | Article |
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Depositing User: | Symplectic Admin |
Date Deposited: | 18 Oct 2016 08:59 |
Last Modified: | 19 Jan 2023 07:29 |
DOI: | 10.1063/1.4955129 |
Related URLs: | |
URI: | https://livrepository.liverpool.ac.uk/id/eprint/3003818 |