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.
Highlights
Organic light-emitting diodes (OLEDs) have developed rapidly since the first efficient double layer structure device was reported by Tang [1]
The characterization of materials was investigated by using nuclear magnetic resonance (NMR) (1 H, 13 C), mass spectrometry and thermogravimetric analysis (TGA)
The development of high efficient fluorescent-emitting material is a key issue for high performance OLED devices
Summary
Organic light-emitting diodes (OLEDs) have developed rapidly since the first efficient double layer structure device was reported by Tang [1]. They are expected as the promising candidates for generation flat-panel displays and solid-state lighting sources due to various advantages, such as high-quality color, low energy cost, light weight, and flexibility [2]. There are still some issues related to device performance and reliability need to improve, especially the efficiency of device with fluorescent emitting materials. The development of high efficient fluorescent-emitting material is a key issue for high performance OLED devices
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