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Utilizing Electroplex Emission to Achieve External Quantum Efficiency up to 18.1% in Nondoped Blue OLED.

作者信息

Zhan Xuejun, Wu Zhongbin, Gong Yanbin, Tu Jin, Xie Yujun, Peng Qian, Ma Dongge, Li Qianqian, Li Zhen

机构信息

Department of Chemistry, Sauvage Center for Molecular Sciences, Wuhan University, Wuhan 430072, China.

Changchun Institute of Applied Chemistry, The Chinese Academy of Sciences, Changchun 130022, China.

出版信息

Research (Wash D C). 2020 Feb 27;2020:8649102. doi: 10.34133/2020/8649102. eCollection 2020.

DOI:10.34133/2020/8649102
PMID:32190835
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7063226/
Abstract

For the first time, electroplex emission is utilized to enhance the performance of nondoped blue organic light-emitting diodes (OLEDs). By decorating the twisted blue-emitting platform and adjusting the electronic structure, three molecules of 3Cz-Ph-CN, 3Cz-mPh-CN, and 3Ph-Cz-CN with a donor-acceptor structure are synthesized and investigated. When external voltage is applied, electroplex emission, which contributes to the emission performance of OLED, can be realized at the interface between the emitting layer and the electron-transporting layer. Accordingly, high external quantum efficiency of 18.1% can be achieved, while the emission wavelength of the device can be controlled in the blue region. Our results provide the possibility to enhance the performance of OLED through electroplex emission, in addition to the generally investigated thermally activated delayed fluorescence (TADF). Excitedly, when 3Ph-Cz-CN is used as host material in orange-emitting phosphorous OLEDs (PO-01 as the dopant), unprecedented high external quantum efficiency of 27.4% can also be achieved.

摘要
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01c3/7063226/e4990457e52b/RESEARCH2020-8649102.006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01c3/7063226/83b6a5cf8cd8/RESEARCH2020-8649102.sch.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01c3/7063226/b81d2ce166ec/RESEARCH2020-8649102.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01c3/7063226/afb7fc4e6bca/RESEARCH2020-8649102.002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01c3/7063226/2ef67eb1cd10/RESEARCH2020-8649102.003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01c3/7063226/28939c3456af/RESEARCH2020-8649102.004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01c3/7063226/67c9c18dbc17/RESEARCH2020-8649102.005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01c3/7063226/e4990457e52b/RESEARCH2020-8649102.006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01c3/7063226/83b6a5cf8cd8/RESEARCH2020-8649102.sch.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01c3/7063226/b81d2ce166ec/RESEARCH2020-8649102.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01c3/7063226/afb7fc4e6bca/RESEARCH2020-8649102.002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01c3/7063226/2ef67eb1cd10/RESEARCH2020-8649102.003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01c3/7063226/28939c3456af/RESEARCH2020-8649102.004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01c3/7063226/67c9c18dbc17/RESEARCH2020-8649102.005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/01c3/7063226/e4990457e52b/RESEARCH2020-8649102.006.jpg

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