• Chinese Optics Letters
  • Vol. 21, Issue 2, 022601 (2023)
Lingjie Fan1、2, Maoxiong Zhao1、2, Jiao Chu1, Tangyao Shen1、2, Minjia Zheng1, Fang Guan3, Haiwei Yin2, Lei Shi1、2、3、4、*, and Jian Zi1、2、3、4、**
Author Affiliations
  • 1Department of Physics, Key Laboratory of Micro- and Nano-Photonic Structures (Ministry of Education), and State Key Laboratory of Surface Physics, , Shanghai 200433, China
  • 2for Nano-fabrication (SERCOM), Shanghai 200433, China
  • 3Institute for Nanoelectronic Devices and Quantum Computing, , Shanghai 200438, China
  • 4Collaborative Innovation Center of Advanced Microstructures, , Nanjing 210093, China
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    DOI: 10.3788/COL202321.022601 Cite this Article
    Lingjie Fan, Maoxiong Zhao, Jiao Chu, Tangyao Shen, Minjia Zheng, Fang Guan, Haiwei Yin, Lei Shi, Jian Zi. Full description of dipole orientation in organic light-emitting diodes[J]. Chinese Optics Letters, 2023, 21(2): 022601 Copy Citation Text show less

    Abstract

    Considerable progress has been made in organic light-emitting diodes (OLEDs) to achieve high external quantum efficiency, among which dipole orientation has a remarkable effect. In most cases, the radiation of the dipoles in OLEDs is theoretically predicted with only one orientation parameter to match with corresponding experiments. Here, we develop a new theory with three orientation parameters to fully describe the relationship between dipole orientation and power density. Furthermore, we design an optimal test structure for measuring all three orientation parameters. All three orientation parameters could be retrieved from non-polarized spectra. Our theory provides a universal plot of dipole orientations in OLEDs, paving the way for designing more complicated OLED devices.

    1. Introduction

    Since the first reports of organic light-emitting diodes (OLEDs) in 1987[1], their efficiency has been improved through finding novel phosphorescent materials[210], optimizing the thickness of each layer in OLEDs[1113], etc. In recent years, dipole orientation has also been drawing significant attention for enhancing light extraction from OLEDs[1421].

    Lingjie Fan, Maoxiong Zhao, Jiao Chu, Tangyao Shen, Minjia Zheng, Fang Guan, Haiwei Yin, Lei Shi, Jian Zi. Full description of dipole orientation in organic light-emitting diodes[J]. Chinese Optics Letters, 2023, 21(2): 022601
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