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Proceedings Paper

Tuning charge carrier injection and recombination in solution-processed PLEDs (Conference Presentation)
Author(s): Ji-Seon Kim

Paper Abstract

A large band-edge offset at organic/inorganic interfaces and imbalance in charge carrier mobilities of conjugated polymers limits an efficient charge injection and recombination in polymer light-emitting diodes (PLEDs). In this talk, I will discuss how the electrochemical doping of conjugated polymers with ultra-trace (< 1 wt%) electrochemical doping agents (EDAs) can significantly improve charge injection and balance, hence enhancing the recombination and device performance. In particular, I will highlight a dramatic reduction of turn-on voltages for current and luminance achieved in the single-layer PLED devices up to 1.2um-thick. I will also show other advantages of the ultra-trace electrochemical doping which allows fabrication of large-area devices with homogeneous electroluminescence emission. Our work provides a simple but highly feasible strategy for developing high-quality efficient light applications fully compatible with printing technologies.

Paper Details

Date Published: 10 September 2019
Proc. SPIE 11093, Organic and Hybrid Light Emitting Materials and Devices XXIII, 110930V (10 September 2019); doi: 10.1117/12.2531810
Show Author Affiliations
Ji-Seon Kim, Imperial College London (United Kingdom)

Published in SPIE Proceedings Vol. 11093:
Organic and Hybrid Light Emitting Materials and Devices XXIII
Chihaya Adachi; Jang-Joo Kim; Franky So, Editor(s)

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