Open AccessElectroluminescence of polymer doped small-molecules light-emitting diodes and the effects of doping trap
Author(s) -
Nie Hai,
Bo Zhang,
Tang Xian-zhong
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.263
Subject(s) - electroluminescence , doping , materials science , rubrene , dopant , diode , optoelectronics , polymer , light emitting diode , oled , trap (plumbing) , molecule , nanotechnology , composite material , organic chemistry , chemistry , physics , layer (electronics) , meteorology
Polymer doped small-molecule light-emitting diodes have been fabricated using a novel PTPD (poly-TPD) as the hole transport material and the highly fluorescent rubrene as the dopant. Electroluminescent characteristics are studied at different doped concentrations and different film thicknesses. The results indicate the presence of doping trap effect. It is assumed that the traps are limited at discrete levels. Based upon the double-carrier injection theory, an analytical model of J-V characteristics of doped device is deduced by solving the Poisson equation. Calculated data of this model are consistent with our experimental results.