Title of article :
Fluorescence spectroscopic characterization of 4,7-bis(2-thienyl)-1,2,5-oxadiazolo[3,4-c]pyridine; lead structure of new red-emitting EL material
Author/Authors :
Koga، نويسنده , , Toshiaki and Takase، نويسنده , , Akiara and Yasuda، نويسنده , , Seiji and Yamashita، نويسنده , , Shoji and Gorohmaru، نويسنده , , Hideki and Thiemann، نويسنده , , Thies and Mataka، نويسنده , , Shuntaro and Takahashi، نويسنده , , Kazufumi، نويسنده ,
Abstract :
The spectroscopic parameters of 4,7-bis(2-thienyl)-1,2,5-oxadiazolo[3,4-c]pyridine (DTOP) were determined which was designed as a red-emitting dye for the electroluminescent (EL) device. The main optical transition of DTOP is attributable to 1La, and therefore, the fluorescence maximum shifted to the red side to reach to 630 nm according to the solvents. Although the non-radiative transition rate was enhanced, when the fluorescence maximum shifts to the longer than 610 nm, DTOP maintains the higher radiation transition probability.
