Effect of thermal annealing Super Yellow emissive layer on efficiency of OLEDs
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MacLeod, Jennifer
Thu, Trang Do
Sonar, Prashant
Yambem, Soniya D
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Abstract
Thermal annealing of the emissive layer of an organic light emitting diode (OLED) is a common practice for solution processable emissive layers and reported annealing temperatures varies across a wide range of temperatures. We have investigated the influence of thermal annealing of the emissive layer at different temperatures on the performance of OLEDs. Solution processed polymer Super Yellow emissive layers were annealed at different temperatures and their performances were compared against OLEDs with a non-annealed emissive layer. We found a significant difference in the efficiency of OLEDs with different annealing temperatures. The external quantum efficiency (EQE) reached a maximum of 4.09% with the emissive layer annealed at 50 °C. The EQE dropped by ~35% (to 2.72%) for OLEDs with the emissive layers annealed at 200 °C. The observed performances of OLEDs were found to be closely related to thermal properties of polymer Super Yellow. The results reported here provide an important guideline for processing emissive layers and are significant for OLED and other organic electronics research communities.
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Scientific Reports
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7
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1
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© The Author(s) 2017. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
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Molecular and organic electronics
Nanotechnology
Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
LIGHT-EMITTING-DIODES
GLASS-TRANSITION
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Burns, S; MacLeod, J; Thu, TD; Sonar, P; Yambem, SD, Effect of thermal annealing Super Yellow emissive layer on efficiency of OLEDs, Scientific Reports, 2017, 7 (1), pp. 40805:1-40805:8