Tech On reported that a Japanese research group succeeded a Oled device that use a green light emitting phosphor material. This material achieves a very high light emitting efficiency of 210 lm/w.
The OLED device developed by the research group has the bottom emission type structure, which extracts light through a substrate made with transparent electrodes. In addition, a 0.7mm-thick glass plate with a refraction index as high as 2.03 is bonded to the substrate. The surface of this glass plate is processed to have a structure of about 0.3mm-pitch optical lens array.
via Tech On
