Dongli developed a full color organic EL display with blue light-emitting materials

Dongli successfully developed luminescent materials for full-color organic EL display efficiency and color purity of the world's highest level of blue. The company in order to achieve the practicality of the material as soon as possible, is stepping up its assessment.

The blue light-emitting materials developed in Dongli are able to maximize the use of electrical energy injected from the electrodes by using independently developed molecular design and nano dispersion technology. By combining with the company's electronic transport materials, the luminescence properties of the 6cd/A (, CIE) chromaticity diagram (color purity) of the luminous efficiency (0.14) were obtained.

In addition, it is difficult to realize the low driving voltage and long life at the same time, and the material can realize long life under the condition of low driving voltage. Thus, the utility model can realize the sharing of the electron transport layer, and use all of the electronic transport materials of the 3 primary colors, and is expected to realize the energy saving and the reduction of the process cost of the display.

Organic EL display for self luminous mode, with good visibility, easy to thin, high speed response and other characteristics, as a new generation of flat panel display concern. With the formation of the market, how to improve the characteristics, especially how to save energy has become an urgent problem to be solved.

The company had already introduced a low driving voltage, high luminous efficiency of red light-emitting materials and electronic transport materials, and was used by a number of panel manufacturers. In particular, the electronic transport material with high electron transport capacity, as a material which is beneficial to the energy saving of the organic EL display, has been praised by users. However, in the full color 3 primary colors and blue combination only because of the blue light-emitting materials used in the presence of low luminous characteristics. The company decided to develop a combination of the use of self-developed electronic transport materials, can be developed simultaneously to achieve low driving voltage and high luminous characteristics of blue light-emitting materials.

Source: Nikkei BP