Increased Electromer Formation and Charge Trapping in Solution-Processed versus Vacuum-Deposited Small Molecule Host Materials of Organic Light-Emitting Devices

ACS Applied Materials & Interfaces
Yong Joo ChoH Aziz

Abstract

We investigate and compare between organic light-emitting devices (OLEDs) fabricated by solution-coating versus vacuum-deposition. Electroluminescence, photoluminescence, and chromatographic measurements on typical OLED host materials reveal significant electromer formation in layers fabricated by solution-processing, pointing to stronger intermolecular interactions in these systems. Delayed electroluminescence measurements reveal that solution-processed layers also have increased charge traps. The findings provide insights on the morphological differences between solution-processed and vacuum-deposited materials and shed light on the root causes behind the lower electroluminescence stability of solution-processed OLEDs.

References

Feb 26, 2009·The Journal of Chemical Physics·Vygintas JankusAndrew P Monkman
May 16, 2009·Nature·Sebastian ReinekeKarl Leo
Mar 11, 2010·Advanced Materials·Madhusudan SinghGhassan E Jabbour

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Citations

Mar 3, 2020·Nanoscale Horizons : the Home for Rapid Reports of Exceptional Significance in Nanoscience and Nanotechnolgy·Elisa FrestaRubén D Costa
Jun 2, 2020·ACS Applied Materials & Interfaces·Elisa FrestaRubén D Costa

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