Accession Number : ADA314623

Title :   Finite Size Effects on Electroluminescence of Nanoscale Semiconducting Polymer Heterojunctions.

Descriptive Note : Technical rept.,

Corporate Author : ROCHESTER UNIV NY DEPT OF CHEMICAL ENGINEERING

Personal Author(s) : Jenekhe, Samson A. ; Zhang, Xuejun ; Chen, X. L. ; Choong, Vi-En ; Gao, Yongli

PDF Url : ADA314623

Report Date : 09 SEP 1996

Pagination or Media Count : 18

Abstract : Several new nanoscale (25-130 nm) n-type/p-type semiconducting polymer heterojunctions have been prepared and used to investigate finite size effects on electroluminescence of bilayered semiconducting polymer heterojunctions. Our results show that the series of pi-conjugated polyquinolines can be used as both emissive and electron transport layers in light emitting devices. The polyquinolines/poly(p-phenylene vinylene) heterojunction light emitting diodes with appropriate nanoscale layer thicknesses were found to switch colors (orange/red to green) reversibly with applied voltage and to exhibit enhanced performance compared to either single layer devices or bilayer devices with only single layer emission. The observed finite size effects are related to the small charge carrier ranges in semiconducting polymers. Finite size effects in semiconducting polymer heterojunctions also have implications for other electronic and optoelectronic applications such as field effect transistors, photovoltaic cells, and photodetectors. Finite size effects; semiconducting polymer heterojunctions; light emitting diodes; electroluminescence; polyquinolines; poly (p-phenylene vinylene).

Descriptors :   *HETEROJUNCTIONS, *LIGHT EMITTING DIODES, ELECTROOPTICS, LAYERS, POLYMERS, ELECTRON TRANSPORT, ELECTROLUMINESCENCE, FIELD EFFECT TRANSISTORS, COLORS, OPTICAL SWITCHING, PHOTODETECTORS, PHOTOVOLTAIC EFFECT, QUINOLINES, POLYVINYLIDENES.

Subject Categories : Electrooptical and Optoelectronic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE