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用于基于吲哚咔唑的蓝色有机发光二极管中延长器件寿命的自旋翻转受限多共振发射体。

Spin-Flip-Restricted Multiple-Resonance Emitters for Extended Device Lifetime in Indolocarbazole-Based Blue Organic Light-Emitting Diodes.

作者信息

Kang Jihoon, Lee Ha Lim, Jeon Soon Ok, Bae Hye Jin, Kim Seung Chan, Han Seungwon, Lee Jun Yeob

机构信息

School of Chemical Engineering, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi, 16419, Republic of Korea.

Samsung Advanced Institute of Technology, Samsung Electronics Co., Ltd, 130 Samsung-ro, Yeongtong-gu, Suwon, Gyeonggi, 16678, Republic of Korea.

出版信息

Adv Sci (Weinh). 2024 Oct;11(40):e2405604. doi: 10.1002/advs.202405604. Epub 2024 Aug 29.

DOI:10.1002/advs.202405604
PMID:39206882
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11515912/
Abstract

In this study, a multiple-resonance (MR) core structure is developed with a spin-flip-restricted emission mechanism based on a fused indolo[3,2,1-jk]carbazole (ICz) framework as emitters to improve the lifetime of blue organic light-emitting diodes. The molecular skeleton modulation approach applied to the conjugated π-system effectively stabilizes the triplet energy of the fused ICz emitters and narrows the full-width-at-half maximum (<20 nm). In addition, the emitters exhibit higher exciton stability than conventional boron-based MR emitters. The fused ICz-based blue fluorescent device exhibits a high external quantum efficiency of 7.2%, a blue index of 68.6 cd A at a Commission internationale de l'éclairage y coordinate (CIE) of 0.075, and a device lifetime 1.8 times longer than that of a boron-based emitter. In addition, a phosphor-sensitized fluorescent device based on the ICz emitter exhibited an improved external quantum efficiency of 20.6% with a CIE coordinate of 0.076.

摘要

在本研究中，基于稠合吲哚并[3,2,1-jk]咔唑（ICz）框架作为发光体，开发了一种具有自旋翻转受限发射机制的多共振（MR）核心结构，以提高蓝色有机发光二极管的寿命。应用于共轭π体系的分子骨架调制方法有效地稳定了稠合ICz发光体的三重态能量，并使半高宽变窄（<20nm）。此外，与传统的硼基MR发光体相比，这些发光体表现出更高的激子稳定性。基于稠合ICz的蓝色荧光器件表现出7.2%的高外量子效率，在国际照明委员会y坐标（CIE）为0.075时的蓝光指数为68.6cd/A，器件寿命比硼基发光体长1.8倍。此外，基于ICz发光体的磷光敏化荧光器件在CIE坐标为0.076时表现出20.6%的提高外量子效率。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d05e/11515912/e156519648a0/ADVS-11-2405604-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d05e/11515912/c9f2bd90c38b/ADVS-11-2405604-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d05e/11515912/fcb1f63a1b85/ADVS-11-2405604-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d05e/11515912/b4cc5ec13263/ADVS-11-2405604-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d05e/11515912/f3df1b02e9d1/ADVS-11-2405604-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d05e/11515912/2c15ec54ce6d/ADVS-11-2405604-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d05e/11515912/f779432c1010/ADVS-11-2405604-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d05e/11515912/796d39d2c971/ADVS-11-2405604-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d05e/11515912/e156519648a0/ADVS-11-2405604-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d05e/11515912/c9f2bd90c38b/ADVS-11-2405604-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d05e/11515912/fcb1f63a1b85/ADVS-11-2405604-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d05e/11515912/b4cc5ec13263/ADVS-11-2405604-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d05e/11515912/f3df1b02e9d1/ADVS-11-2405604-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d05e/11515912/2c15ec54ce6d/ADVS-11-2405604-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d05e/11515912/f779432c1010/ADVS-11-2405604-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d05e/11515912/796d39d2c971/ADVS-11-2405604-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/d05e/11515912/e156519648a0/ADVS-11-2405604-g004.jpg

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Adv Mater. 2023 Jul;35(30):e2301018. doi: 10.1002/adma.202301018. Epub 2023 Jun 6.
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Precise Regulation of Emission Maxima and Construction of Highly Efficient Electroluminescent Materials with High Color Purity.
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Peripherally Heavy-Atom-Decorated Strategy Towards High-Performance Pure Green Electroluminescence with External Quantum Efficiency over 40 .外围重原子修饰策略实现高性能纯绿色电致发光，外量子效率超过 40%。
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