Author/Authors :
Ma، نويسنده , , Dongge and Liang، نويسنده , , Fushun and Wang، نويسنده , , Lixiang and Lee، نويسنده , , S.T. and Hung، نويسنده , , L.S.، نويسنده ,
Abstract :
We report a blue organic light-emitting device having an emissive layer of 2-(2-hydroxyphenyl)-5-phenyl-1,3,4-oxadiazole (HOXD), that exhibits excited state intramolecular proton transfer (ESIPT). The device had a luminance efficiency of 0.8 cd/A and a maximum brightness of 870 cd/m2. Electroluminescence spectra revealed a dominating peak at 450 nm and two additional peaks at 480 and 515 nm with a full width at half maximum of 50 nm. Our studies indicate that some EL may originate from the triplet excitation state of the enol form of HOXD.
