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Title: Quinolyl functionalized spiro[fluorene-9,9'-xanthene] host materials with bipolar characteristics for green and red phosphorescent organic light-emitting diodes

Abstract

Spiro[fluorene-9,9'-xanthene] (SFX) bipolar hosts bearing one, two and three quinolyl substituents, namely SFX-bPy, SFX-DbPy and SFX-TbPy, were designed and synthesized for phosphorescent organic light emitting diodes (PhOLEDs). The successive substitution of quinoline at 2', 2 and 7' positions of SFX results in reduced LUMO energy levels while leaving the HOMO energy levels nearly intact. The impact of quinoline substitution in these SFX-based hosts on PhOLED performance was investigated in detail through green and red model devices. For the green emitting devices, the device based on SFX-bPy host showed better performance (23.6 cd A-1, 23.4 lm W-1, 6.3%) due to high triplet energy level (T1) and balanced carriers-transporting ability. In contrast, for the red PhOLED devices, the device hosted by SFX-DbPy displayed higher performance (15.8 cd A-1, 16.0 lm W-1, 9.1%), attributable to the well matched T1 and separated frontier molecular orbitals. This work thus sheds light on the rational design of SFX-based bipolar hosts for more efficient PhOLEDs.

Authors:
 [1];  [2];  [2];  [3];  [4];  [4];  [4];  [5];  [6];  [6]
  1. Shenyang Univ. of Chemical Technology, Shenyang (China); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Shenyang Univ. of Chemical Technology, Shenyang (China)
  3. Xinyang Normal Univ., Xinyang (China)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. Northeast Forestry Univ., Harbin (China)
  6. Jilin Univ., Changchun (China)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1530248
Alternate Identifier(s):
OSTI ID: 1351661
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Organic Electronics
Additional Journal Information:
Journal Volume: 36; Journal Issue: C; Journal ID: ISSN 1566-1199
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Ren, Bao-Yi, Zhong, Dao-Kun, Sun, Ya-Guang, Zhao, Xiang-Hua, Zhang, Qi-Jian, Liu, Yi, Jurow, Matthew, Sun, Ming-Li, Zhang, Zhen-Song, and Zhao, Yi. Quinolyl functionalized spiro[fluorene-9,9'-xanthene] host materials with bipolar characteristics for green and red phosphorescent organic light-emitting diodes. United States: N. p., 2016. Web. doi:10.1016/j.orgel.2016.06.006.
Ren, Bao-Yi, Zhong, Dao-Kun, Sun, Ya-Guang, Zhao, Xiang-Hua, Zhang, Qi-Jian, Liu, Yi, Jurow, Matthew, Sun, Ming-Li, Zhang, Zhen-Song, & Zhao, Yi. Quinolyl functionalized spiro[fluorene-9,9'-xanthene] host materials with bipolar characteristics for green and red phosphorescent organic light-emitting diodes. United States. https://doi.org/10.1016/j.orgel.2016.06.006
Ren, Bao-Yi, Zhong, Dao-Kun, Sun, Ya-Guang, Zhao, Xiang-Hua, Zhang, Qi-Jian, Liu, Yi, Jurow, Matthew, Sun, Ming-Li, Zhang, Zhen-Song, and Zhao, Yi. Thu . "Quinolyl functionalized spiro[fluorene-9,9'-xanthene] host materials with bipolar characteristics for green and red phosphorescent organic light-emitting diodes". United States. https://doi.org/10.1016/j.orgel.2016.06.006. https://www.osti.gov/servlets/purl/1530248.
@article{osti_1530248,
title = {Quinolyl functionalized spiro[fluorene-9,9'-xanthene] host materials with bipolar characteristics for green and red phosphorescent organic light-emitting diodes},
author = {Ren, Bao-Yi and Zhong, Dao-Kun and Sun, Ya-Guang and Zhao, Xiang-Hua and Zhang, Qi-Jian and Liu, Yi and Jurow, Matthew and Sun, Ming-Li and Zhang, Zhen-Song and Zhao, Yi},
abstractNote = {Spiro[fluorene-9,9'-xanthene] (SFX) bipolar hosts bearing one, two and three quinolyl substituents, namely SFX-bPy, SFX-DbPy and SFX-TbPy, were designed and synthesized for phosphorescent organic light emitting diodes (PhOLEDs). The successive substitution of quinoline at 2', 2 and 7' positions of SFX results in reduced LUMO energy levels while leaving the HOMO energy levels nearly intact. The impact of quinoline substitution in these SFX-based hosts on PhOLED performance was investigated in detail through green and red model devices. For the green emitting devices, the device based on SFX-bPy host showed better performance (23.6 cd A-1, 23.4 lm W-1, 6.3%) due to high triplet energy level (T1) and balanced carriers-transporting ability. In contrast, for the red PhOLED devices, the device hosted by SFX-DbPy displayed higher performance (15.8 cd A-1, 16.0 lm W-1, 9.1%), attributable to the well matched T1 and separated frontier molecular orbitals. This work thus sheds light on the rational design of SFX-based bipolar hosts for more efficient PhOLEDs.},
doi = {10.1016/j.orgel.2016.06.006},
journal = {Organic Electronics},
number = C,
volume = 36,
place = {United States},
year = {Thu Jun 09 00:00:00 EDT 2016},
month = {Thu Jun 09 00:00:00 EDT 2016}
}

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Cited by: 14 works
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