使用 TEMPOL 衍生物提高溶液处理有机发光二极管的性能

IF 4 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Synthetic Metals Pub Date : 2024-11-22 DOI:10.1016/j.synthmet.2024.117798

Jae Ho Kim , Sumin Oh , Chaehyun Park , Yubin Kim , Gyumok Lim , Youngu Lee , Jin Woo Choi , Hyung Woo Lee , Myungkwan Song

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引用次数: 0

摘要

本研究报告了在广泛使用的空穴注入/传输聚（3,4-亚乙二氧基噻吩）：聚苯乙烯磺酸盐（PEDOT:PSS）层中溶液加工的新型 4-羟基-2,2,6,6-四甲基哌啶-1-氧（TEMPOL）衍生有机化合物。通过一步化学程序合成的 TEMPOL 衍生有机掺杂剂具有独特的分子偶极特性和导电性。与基于原始 PEDOT:PSS 层的器件相比，采用 4-苯磺酰基-2,2,6,6-四甲基-1-哌啶氧基自由基（TBS）掺杂 PEDOT:PSS 层的绿色有机发光二极管（OLED）的最大功率效率（PEmax）为 25.58 lm W-1，最大外部量子效率（EQEmax）为 12.19 %，最大电流效率（CEmax）为 40.85 cd A-1，均有显著提高。在相同条件下，纤维 OLED 也获得了 PEmax（16.18 lm W-1）、EQEmax（10.67 %）和 CEmax（37.01 cd A-1）。OLED 性能的提高可归因于阳极和发射层界面的空穴注入势垒降低。

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Enhanced performance of solution-processed organic light-emitting diodes with TEMPOL derivatives

This study reports novel solution-processed 4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPOL)-derivative organic compounds in a widely employed hole-injection/transport poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) layer. The TEMPOL-derived organic dopants, synthesized via a one-step chemical procedure, exhibited distinctive molecular dipole characteristics and electrical conductivities. The green organic light-emitting diodes (OLEDs) with a 4-benzene sulfonyl-2,2,6,6-tetramethyl-1-piperidenyloxy radical (TBS)-doped PEDOT:PSS layer exhibited a maximum power efficiency (PE_max) of 25.58 lm W⁻¹, maximum external quantum efficiency (EQE_max) of 12.19 %, and maximum current efficiency (CE_max) of 40.85 cd A⁻¹, demonstrating significant improvements compared with the pristine PEDOT:PSS layer-based device. The PE_max (16.18 lm W⁻¹), EQE_max (10.67 %), and CE_max (37.01 cd A⁻¹) were obtained with fiber OLEDs under same conditions. This enhancement in OLED performance can be attributed to the decreased hole-injection barrier at the anode and emissive layer interfaces.

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来源期刊

Synthetic Metals 工程技术-材料科学：综合

CiteScore

8.30

自引率

4.50%

发文量

189

审稿时长

33 days

期刊介绍： This journal is an international medium for the rapid publication of original research papers, short communications and subject reviews dealing with research on and applications of electronic polymers and electronic molecular materials including novel carbon architectures. These functional materials have the properties of metals, semiconductors or magnets and are distinguishable from elemental and alloy/binary metals, semiconductors and magnets.