Konica-minolta Holdings, Inc.

Aki Nakata

Hiroshi Kita

Shuichi Sugita

Eisaku Katoh

Shinya Otsu

Yoshiyuki Suzuri

Noriko Yasukawa

An organic electroluminescent element containing an anode and a cathode having therebetween a light emitting layer containing a phosphorescent compound, and hole blocking layer 1 provided adjacent to the light emitting layer and between the light emitting layer and the cathode, wherein hole blocking layer 1 contains a phosphorescent compound; and a content of the phosphorescent compound contained in hole blocking layer 1 is in the range of 0.1 to 50% of a content of the phosphorescent compound contained in the light emitting layer.

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Hino, Japan

Aki Nakata