Stable driving voltage in exciplex-type OLEDs with a bilayer interface

IF 2.3 4区物理与天体物理 Q3 PHYSICS, APPLIED

Applied Physics Express Pub Date : 2024-09-02 DOI:10.35848/1882-0786/ad708d

Masahiro Morimoto, Hikaru Nagahama, Shigeki Naka

引用次数: 0

Abstract

Organic light-emitting diodes (OLEDs) that produce exciplexes in a bilayer are device structures that can dramatically reduce the turn-on voltage. In this study, we report that this device structure contributes to an impressive improvement in operating lifetime. The lifetime of our OLED is 200 times longer than that of conventional OLEDs, and the voltage does not change after 100 h of operation. The reason for the stable driving voltage is no carrier accumulation inside the device at all by using a displacement current measurement. Analyzing the carrier dynamics in this work will provide a comprehensive solution for OLED degradation.

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具有双层界面的有机发光二极管中的稳定驱动电压

在双电层中产生赋形剂的有机发光二极管（OLED）是一种能显著降低开启电压的器件结构。在本研究中，我们报告了这种器件结构对工作寿命的显著改善。我们的有机发光二极管的使用寿命是传统有机发光二极管的 200 倍，而且工作 100 小时后电压也不会发生变化。驱动电压稳定的原因是，通过位移电流测量，器件内部完全没有载流子积累。这项工作中对载流子动力学的分析将为 OLED 退化提供全面的解决方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics Express 物理-物理：应用

CiteScore

4.80

自引率

8.70%

发文量

310

审稿时长

1.2 months

期刊介绍： Applied Physics Express (APEX) is a letters journal devoted solely to rapid dissemination of up-to-date and concise reports on new findings in applied physics. The motto of APEX is high scientific quality and prompt publication. APEX is a sister journal of the Japanese Journal of Applied Physics (JJAP) and is published by IOP Publishing Ltd on behalf of the Japan Society of Applied Physics (JSAP).