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Electroluminescence properties of new multi-functional copolymers containing carbazole, naphthalimide and oxadiazole

Authors
Journal
Thin Solid Films
0040-6090
Publisher
Elsevier
Publication Date
Volume
417
Identifiers
DOI: 10.1016/s0040-6090(02)00595-3
Keywords
  • Light-Emitting Diodes
  • Copolymers
  • Carbazole
  • 1
  • 8-Naphthalimide
  • 1
  • 3
  • 4-Oxadiazole
Disciplines
  • Earth Science

Abstract

Abstract We have prepared a new class of copolymers containing carbazole, 1,8-naphthalimide and 1,3,4-oxadiazole. Optical properties of the copolymers are studied in the UV-visible region. Thermogravimetric analysis and differential scanning calorimetry examined their thermal stability. The copolymers are soluble in common organic solvents, and emit blue-green light under the irradiation of UV light in their film states. For these copolymers, there is an intramolecular energy transfer from carbazole and 1,3,4-oxadiazole to 1,8-naphthalimide. Single-layer devices of indium tin oxide/copolymers/aluminum utilizing these copolymers as emissive materials were fabricated, that emitted blue-green light at 6–8 V under a forward bias.

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