Sub-400 nm ultra-violet luminescence of (4´-methoxy)-9-phenylcarbazole

Author

Li, K.F. ; Luo, Lei ; Leun, Louis M L ; Cheah, K.W.

Author_Institution

Dept. of Phys., Hong Kong Baptist Univ., China

Volume

1

fYear

2003

fDate

15-19 Dec. 2003

Abstract

Intense ultra-violet photoluminescence at 380 nm (3.26 eV) was observed from a small organic molecule, (4´-methoxy)-9-phenylcarbazole (MeOKPA) at room temperature. The intensity is at least three times of that of Alq₃, which is most widely used for organic LED application. Excitation spectrum and low temperature photoluminescence (PL) results show that the shortest emission is at 360 nm (3.44 eV). The small stoke shift of 180 meV from excitation to emission indicates that the radiative recombination of MeOKPA is extremely efficient and the compound is robust over a wide temperature range. Moreover, it also has strong upconversion efficiency. Its upconversion PL is a little different from normal PL. The result indicates that it is a strong candidate as organic laser.

Keywords

excited states; organic compounds; organic light emitting diodes; photoluminescence; radiative transfer; spectral line shift; ultraviolet spectra; (4´-methoxy)-9-phenylcarbazole; 180 meV; 293 to 298 K; 3.26 eV; 3.44 eV; 360 nm; Alq₃; excitation spectrum; intense ultra-violet luminescence; low temperature photoluminescence; organic LED application; organic laser; organic molecule; radiative recombination; upconversion photoluminescenc efficiency; Biological materials; Biomedical optical imaging; Inorganic materials; Light emitting diodes; Luminescence; Optical materials; Organic materials; Photoluminescence; Physics; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics, 2003. CLEO/Pacific Rim 2003. The 5th Pacific Rim Conference on

Print_ISBN

0-7803-7766-4

Type

conf

DOI

10.1109/CLEOPR.2003.1274725

Filename

1274725