The team of Professor Kim Yun-hee from the Department of Chemistry, National Kyungsang University (GNU), and the team of Professor Kim Jang-ju from Seoul University have jointly developed a highly efficient blue delayed fluorescent material based on oxygen-bridged boron receptors without expensive rare earth metals. On the 20th of last month, it was published in the online version of the famous international academic journal "Adcance Materials" (IF: 27.398) in the materials field.
This research was carried out under the support of the backbone of the Korean Research Foundation and the development of high-efficiency and long-life blue materials. The Ph.D student Cheon Hyung Jin from the team of Professor Kim Yun-hee and Dr. Hyung-cheol Lin from the team of Professor Kim Jang-ju were the co-first authors.
The materials introduced in the paper can emit narrow emission spectra with a half-value width (FWHM) of 55nm and 62nm and the International Commission on Illumination (CIE; Commission Internationale de l'Eclairage) with color coordinates of "0.14, 0.09" and "0.14, 0.21" Blue light with high color purity and high external quantum efficiency (EQE) as high as 28.2% and 25.7%.
At present, for green and red OLED materials that have been commercialized, high-efficiency rare-earth metal-based phosphate rock materials are used, while blue, due to issues such as color purity, uses relatively low-efficiency fluorescent materials.
The blue material developed in this research, without the need for expensive rare earth metals, also exhibits high-efficiency characteristics surpassing rare earth metal materials, and at the same time has high color purity characteristics, and is considered to be a material that is worth looking forward to in the future. .
Kyungsang University has been researching organic semiconductor materials 15 years ago. Since 2011, Kyungsang University/Samsung Display OLED Center has been introduced to carry out active industry-academic research.
Graduates in this field not only work in large companies including Samsung Display, Samsung Electronics, LG Electronics, SK Energy, SDI, Doosan, etc., but also work in Tokuyama Neolux, LT Materials, Merck, Daelim Chemical, DONGJIN SEMICHEM, Ukseung Chemical, Medium-sized companies such as SFC have national competitiveness not only in the field of research and development, but also in personnel training.