A sterically shielded design on anthracene-based emitters for efficient deep-blue organic light-emitting diodes

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Meizhu Yang
  • Longjiang Xing
  • Zhipeng Qiu
  • Qin-Dan Yang
  • Shaomin Ji
  • Yanping Huo

Detail(s)

Original languageEnglish
Article number130035
Journal / PublicationJournal of Molecular Structure
Volume1232
Online published31 Jan 2021
Publication statusPublished - 15 May 2021

Abstract

Two new anthracene derivatives are designed with a sterically shielded strategy for deep-blue electroluminescence applications. The naphthyl groups of the widely used blue emitter 9,10-di-(2-naphthyl)anthracene (ADN) were modified with four peripheral phenyl groups (PPGs) to enhance intermolecular spacing in solid-state thin film for suppressing electronic coupling. Influence of the PPGs decoration on photoluminescence and electroluminescence are investigated to reveal the structure-property relationship. A nondoped organic light-emitting diode with the new emitter 9-(naphthalen-2-yl)-10-(5,6,7,8-tetraphenylnaphthalen-2-yl)anthracene (M1) exhibits excellent performance with a maximum external quantum efficiency of 5.05% and deep-blue color index of (0.15, 0.09). Although the use of bulky peripheral substituents does improve device performance, it should be paid attention to the non-conductive effect induced by the larger molecular spacing in the design of deep-blue electroluminescence materials. This work provides a promising molecular design for deep-blue electroluminescence materials.

Research Area(s)

  • Deep-blue fluorescence, Electroluminescence, Sterically shielded anthracene

Citation Format(s)