Molecules 2018, 23(4), 843; https://doi.org/10.3390/molecules23040843
Oxadiazole-Based Highly Efficient Bipolar Fluorescent Emitters for Organic Light-Emitting Diodes
Qiong Wu 1,2, Ramanaskanda Braveenth 1
, Heng Qiang Zhang 2, Il-Ji Bae 3, Miyoung Kim 3,*
and Kyu Yun Chai 1,*
, Heng Qiang Zhang 2, Il-Ji Bae 3, Miyoung Kim 3,*
and Kyu Yun Chai 1,*
1
Division of Bio-Nanochemistry, College of Natural Sciences, Wonkwang University Iksan City, Chonbuk 570-749, Korea
2
Department of Chemistry, Hebei Normal University for Nationalities, Chengde 067000, China
3
Nano-Convergence Research Center, Korea Electronics Technology Institute, Jeonju 54853, Korea
*
Authors to whom correspondence should be addressed.
Received: 14 March 2018 / Revised: 30 March 2018 / Accepted: 5 April 2018 / Published: 7 April 2018
Abstract
In this study, a series of bipolar fluorescence emitters named 2DPAc-OXD, DPAc-OXD, 2PTZ-OXD and PTZ-OXD were designed and synthesized with excellent yields. The characterization of materials was investigated by using nuclear magnetic resonance (NMR) (1H, 13C), mass spectrometry and thermogravimetric analysis (TGA). To investigate device efficiencies, two different OLED devices (Device 1, Device 2) were fabricated with two different host materials (Bepp2, DPEPO). The Device 2 with 2PTZ-OXD as fluorescent emitter exhibited excellent power and current efficiencies of 6.88 Lm/W and 10.10 cd/A, respectively. The external quantum efficiency of 2PTZ-OXD was around 3.99% for Device 2. The overall device properties of phenothiazine donor were better than acridine derivatives. View Full-TextKeywords:
bipolar; oxadiazole; acridine; phenothiazine; organic light-emitting diodes; fluorescent
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Wu, Q.; Braveenth, R.; Zhang, H.Q.; Bae, I.-J.; Kim, M.; Chai, K.Y. Oxadiazole-Based Highly Efficient Bipolar Fluorescent Emitters for Organic Light-Emitting Diodes. Molecules 2018, 23, 843.
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