[22a-D316-1~7] 13.8 Optical properties and light-emitting devices

[22a-D316-3] Study of dispersed inorganic EL devices using ZnS:Cu nanophosphors
-Improvement of emission characteristics -by adding Cu_xS nanoparticles -

〇Rei Matsukuma¹, Shuma Bando¹, Yoshinobu Shikata¹, Ohmi Koutoku¹ (1.Tottori Univ.)

Keywords:inorganic EL, nanophosphors, ZnS:Cu

In the preparation of ZnS:Cu phosphors for dispersed EL devices, the highly Cu⁺ activation and high-density Cu_xS formation as carrier source have been attempted. ZnS: Cu nanophosphor particles and Cu_xS nanoparticles are stirred in a solution to fix Cu_xS around ZnS:Cu. With the addition of Cu_xS nanoparticles, an increase of the PL direct excitation band due to Cu+ and a significant increase in the amount of charge in the EL element were confirmed, resulting in improvement of the EL luminance.