Title:Blue Organic Light Emitting Diode Materials based on Different Light-emitting
Groups
Volume: 27
Issue: 4
Author(s): Lichao Li, Xiuna Zhu, Shang Sun, Chaoyue Zhang, Bingxin Yang, Shuang Liu and Zhenbo Liu*
Affiliation:
- College of Chemistry & Chemical Engineering, Yantai University, Yantai, Shandong, 264005, China
Keywords:
OLED, molecular structures, light-emitting groups, blue organic luminescent material, device performance, molecular design.
Abstract: Organic light emitting diode (OLED) is a device that uses organic semiconductor
materials to emit light under the action of an electric field. Compared with traditional luminescent
materials, they have the advantages of good softness, low-temperature resistance,
wider field of vision and low energy consumption, and have been widely used in the field of
display and lighting in recent years. In addition, compared with red and green light-emitting
materials, the maximum external quantum efficiency of blue-light materials-based devices is
high, but the CIE coordinate performance is poor and the blue emission is difficult to achieve
high efficiency and high color purity at the same time. Researchers continue to design new
molecular structures in order to synthesize new high-efficiency blue light materials. It is found
that different molecular structures have different effects on the performance of OLED devices.
In the design and synthesis of blue-light materials, various light-emitting groups are often used to regulate the
stability, singlet-third-line state of the target molecule energy level difference, excited state lifetime, aggregation
state structure, electricity luminescent color and its OLED performance, etc. The introduction of different lightemitting
groups into the blue light material greatly improves the performance of the material. This paper mainly
reviews the research status of blue organic electroluminescent materials in the past five years from different molecular
structures, further discusses the photoelectric properties of each compound and the properties of devices based
on this material, and briefly analyzes the advantages of molecular design and device production. And finally discusses
the improvement methods of blue OLED light-emitting materials in order to provide a reference for future
research.