Deep-Blue and Hybrid-White Organic Light Emitting Diodes Based on a Twisting Carbazole-Benzofuro[2,3-b]Pyrazine Fluorescent Emitter

Chen-Chao Huang; Miao-Miao Xue; Fu-Peng Wu; Yi Yuan; Liang-Sheng Liao; Man-Keung Fung

doi:10.3390/molecules24020353

Deep-Blue and Hybrid-White Organic Light Emitting Diodes Based on a Twisting Carbazole-Benzofuro[2,3-b]Pyrazine Fluorescent Emitter

Molecules. 2019 Jan 19;24(2):353. doi: 10.3390/molecules24020353.

Authors

Chen-Chao Huang¹, Miao-Miao Xue², Fu-Peng Wu³, Yi Yuan⁴, Liang-Sheng Liao^{5

6}, Man-Keung Fung^{7

8}

Affiliations

¹ Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China. cchuang2017@stu.suda.edu.cn.
² Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China. xuemiaomiao0202@yahoo.com.
³ Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China. wufupeng520@126.com.
⁴ Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China. yyuanac@126.com.
⁵ Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China. lsliao@suda.edu.cn.
⁶ Institute of Organic Optoelectronics, Jiangsu Industrial Technology Research Institute (JITRI), 1198 Fenhu Dadao, Wujiang, Suzhou 215123, China. lsliao@suda.edu.cn.
⁷ Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou 215123, China. mkfung@suda.edu.cn.
⁸ Institute of Organic Optoelectronics, Jiangsu Industrial Technology Research Institute (JITRI), 1198 Fenhu Dadao, Wujiang, Suzhou 215123, China. mkfung@suda.edu.cn.

Abstract

A novel deep-blue fluorescent emitter was designed and synthesized. The external quantum efficiency (η_EQE) of the blue-emitting, doped, organic light-emitting diode (OLED) was as high as 4.34%. The device also exhibited an excellent color purity with Commission Internationale de l'Eclairage (CIE) coordinates of x = 0.15 and y = 0.05. In addition, the triplet energy had a value of 2.7 eV, which is rare for an emitter with deep-blue emission, which makes it a preferred choice for high-performance white OLEDs. By optimizing the device architectures, the color of hybrid-white OLEDs could be tunable from warm white to cool white using the aforementioned material as a bifunctional material. That is, the η_EQE of the hybrid warm-white OLED is 20.1% with a CIE x and y of 0.46 and 0.48 and the η_EQE of the hybrid cool-white OLED is 9% with a CIE x and y of 0.34 and 0.33.

Keywords: bifunctional material; deep-blue fluorescence; donor-acceptor molecules; hybrid-white organic light-emitting diode; molecular twisting.

MeSH terms

Carbazoles / chemical synthesis*
Color
Electrochemical Techniques
Fluorescence
Fluorescent Dyes / chemical synthesis*
Molecular Structure
Phase Transition
Photochemical Processes
Pyrazines / chemical synthesis*
Structure-Activity Relationship
Thermodynamics

Substances

Carbazoles
Fluorescent Dyes
Pyrazines

Abstract

MeSH terms

Substances

Grants and funding