[Comparison of the formation cross-sections of exciton in fluorescent and phosphorescent dyes].
In the present paper, polymer-based light-emitting diode employing N-vinylcarbazole (PVK) doped with dilute phosphorescent dye factris-(2-phenylpyridine) iridium [Ir(ppy)3] and fluorescent dye 4-(dicyanomethylene)-2-t-butyl-6-(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB) as active layer was fabricated in order to compare the formation cross-sections of triplet exciton and singlet exciton. According to the changes in the electroluminescence (EL) spectrum and the relative intensity of photoluminescence (PL) spectrum, we deduce that the exciton formation cross-section of Ir(ppy)3 is larger than that of DCJTB.
Lu
Jing
J
Key Lab of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiao-tong University, Beijing 100044, China.
Hou
Yan-bing
YB
Shi
Quan-min
QM
Li
Yun-bai
YB
Jin
Hui
H