A.C. Light Emitting Devices Based on Conjugated Polymers.
OHIO STATE UNIV COLUMBUS DEPT OF PHYSICS
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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 electroderedox 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 polymeremissive polymer interface states.
- Radiation and Nuclear Chemistry