Thin film light emitting element.

摘要

[Object] To provide a thin film light emitting element which emits white light of high colour purity. [Configuration] A blue-light emitting layer 17 is laminated on a zinc sulphide light emitting layer 14. The blue-light emitting layer 17 is comprised of di-yttrium dioxide monosulfide Y2O2S containing doped thulium Tm as light emitting centers; di-lanthanum dioxide monosulfide La2O2S containing doped thulium Tm as light emitting centers; zinc orthosilicate Zn2SiO4 containing doped titanium Ti as light emitting centers; zinc orthosilicate Zn2SiO4 containing doped thulium Tm as light emitting centers; zinc orthosilicate Zn2SiO4 containing doped cerium Ce as light emitting centers; or di-yttrium silicon pentoxide Y2SiO5 containing doped cerium Ce as light emitting centers.