Advanced Materials · 2000 · 174 citations · 0 references
EngineeringElectrical EngineeringMaterials ScienceOptical MaterialsOptoelectronicsSemiconductor MaterialsLight-emitting DiodesLuminescent MaterialsOptoelectronic DevicesOptoelectronic MaterialsOrganic Electronic MaterialsOrganic SemiconductorsDichroic MaterialsDichroismOrganic Light-emitting Diodes
Highly anisotropic films of needle-like crystallinepara-sexiphenyl (PSP)—a promising candidate for the electroactive layer in organic light-emitting diodes (LEDs)—can be produced using hot-wall epitaxy, as demonstrated here (see Figure). Optical dichroic ratios of ≈11 in absorption and up to 14 in emission are measured, which is of great significance for the development of polarized LEDs.