Polarity- and voltage-controlled color-variable light-emitting devices based on conjugated polymers

• Published in: Applied physics letters Vol. 74; no. 18; pp. 2593 - 2595
• Main Authors: Wang, Y. Z., Sun, R. G., Wang, D. K., Swager, T. M., Epstein, A. J.
• Format: Journal Article
• Language: English
• Published: 03-05-1999
• ISSN: 0003-6951; 1077-3118
• DOI: 10.1063/1.123952

There is increased interest in developing multilayer color-variable light-emitting devices. So far, the multilayer color-variable light-emitting devices mainly have focused on polarity-controlled two-color light-emitting devices. We report here the fabrication and study of voltage- and polarity-controlled multilayer multicolor light-emitting devices based on pyridine-containing conjugated polymers and derivatives of polyacetylene. The devices emit red light under forward bias and multiple colors of light (from orange-red to green) under reverse bias. The colors under reverse bias are controlled by the magnitude of the applied voltages.