| abstract |
(57) [Summary] [PROBLEMS] To provide a thin film electroluminescent material which is excellent in color purity and color coordinates and which can obtain a chemically stable blue light emitting body, and a thin film electroluminescent device using the material as a light emitting layer. [Structure] The composition formula is as follows; [Wherein M represents Sr or Ba, RE represents a lanthanoid element, x and y are integers, but x and y are not equal to each other], and a thin film comprising an alkaline earth thiogallate. Electroluminescent material. |