Accession Number : ADA305233

Title :   A.C. Light Emitting Devices Based on Conjugated Polymers.

Descriptive Note : Technical rept.,

Corporate Author : OHIO STATE UNIV COLUMBUS DEPT OF PHYSICS

Personal Author(s) : Wang, Y. Z. ; Geblet, D. D. ; Lin, L. B. ; Blatchford, J. W. ; Jessen, S. W.

PDF Url : ADA305233

Report Date : 01 MAR 1996

Pagination or Media Count : 15

Abstract : Most polymer electrolumininescent devices to date are represented as tunnel diodes and operate under DC driving field. Here we report the fabrication of symmetrically configured AC light emitting (SCALE) devices based on conjugated polymers. The new devices consist of an emissive polymer layer sandwiched between two redox polymer layers. This configuration enables the SCALE devices to work under both forward and reverse DC bias as well as in AC modes. The nearly ohmic electrode/redox polymer contacts improve the charge injection efficiency significantly and make the SCALE device operation insensitive to electrode workfunctions. Symmetric operation supports the key role of redox polymer/emissive polymer interface states.

Descriptors :   *PHOTOLUMINESCENCE, *LIGHT EMITTING DIODES, *TUNNEL DIODES, INJECTION, LAYERS, POLYMERS, EFFICIENCY, ALTERNATING CURRENT, SYMMETRY, CHARGE TRANSFER, BIAS, OXIDATION REDUCTION REACTIONS.

Subject Categories : Radiation and Nuclear Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE