High performance blue organic light-emitting devices fabricated by using the doped Alq₃ in NPB hole transmistion layers

Abstract

We have designed a new structure blue emission device with doped Alq₃ of 3% in hole transmission layers of NPB. The CIE coordination of the devices is (0.17,0.19). The maximum electroluminescence efficiency is 4.1 cd/A at 11V, the brightness is 118.8 cd/m² at 7 V, and the maximum brightness is 10770 cd/m² at 13 V.

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