| 简介 |
PROBLEM TO BE SOLVED : To provide an oxide electroluminescent element containing, as an electroluminescent material, an oxide having a perovskite type crystalline structure expressed by general formula : RMO3, where R is a rare-earth element, and M is Al, Mn or Cr, and emitting ultraviolet light.
SOLUTION : This oxide electroluminescent element has an electroluminescent layer between electrodes facing each other. The oxide electroluminescent element is characterized in that (1) the electroluminescent layer contains the oxide having the perovskite type crystalline structure expressed by general formula : RMO3, where R is a rare-earth element, and M is Al, Mn or Cr; (2) the oxide further contains at least one kind selected from a group comprising transition metals and alkaline earth metals; and (3) light having a wavelength of 200-400 nm is emitted by applying a pulse voltage having a frequency of 0.1 to 10 kHz at electric field intensity above 104 V/cm between the electrodes to set a local maximum value of the density of a current flowing between the electrodes not smaller than 10 μA/cm2.
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