We have elaborated organic-inorganic hybrid light-emitting diodes (HLED). T
hese devices emitting in the green are formed of two hybrid thin layers, ex
hibiting different functionalities, which are sandwiched between indium-tin
oxide (ITO) and metallic electrodes. These layers have been prepared from
silane precursors modified with hole transporting units and light-emitting
naphthalimide moieties by the sol-gel technique. The hole transporting sol-
gel layers exhibit about the same charge mobility as organic polymers havin
g equivalent active units. The maximum external quantum efficiency of the b
est diode using LiF/Al cathode is about 1% and the luminance reaches 4000 c
d.m(-2). (C) 2000 Academie des sciences/Editions scientifiques et medicales
Elsevier SAS.