Title :
Efficient emission from poly(3-alkylthiophene) light emitting diode with different alkyl-side-chain lengths by doping of dye molecules
Author :
Ohmori, Yutaka ; Hironaka, Yasuhisa ; Yoshida, Masayoshi ; Fujii, Akihiko ; Yoshino, Katsumi
Author_Institution :
Fac. of Eng., Osaka Univ., Japan
Abstract :
Electroluminescent (EL) diodes utilizing poly(3-alkylthiophene) (P3AT) containing fluorescent dyes have been fabricated. It has more than 500 times higher EL efficiency in P3AT diodes doped with (1,2,3,4,5-pentaphenyl-1,3-cyclopentadiene) (PPCP) than in undoped diode. The mechanism of emission enhancement in P3AT diodes with different alkyl side chains has been discussed in terms of carrier confinement and energy band diagram.
Keywords :
light emitting diodes; optical polymers; (1,2,3,4,5-pentaphenyl-1,3-cyclopentadiene); P3AT LED; PPCP; alkyl-side-chain length; carrier confinement; electroluminescent efficiency; energy band structure; fluorescent dye doping; poly(3-alkylthiophene) light emitting diode; Carrier confinement; Cathodes; Conductivity; Doping; Electrons; Excitons; Light emitting diodes; Polymers; Time factors; Voltage;
Conference_Titel :
Lasers and Electro-Optics Society Annual Meeting, 1996. LEOS 96., IEEE
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-3160-5
DOI :
10.1109/LEOS.1996.565138
