Department of Chemistry
Optical and electroluminescent studies of white-light-emitting copolymers based on poly(9,9-dioctylfluorene) and fluorenone derivatives
A novel type of single white-light-emitting copolymers, PF-DTFOx, derived from poly(9,9-dioctylfluorene) (PF) in which 2,7-di-(2-thienyl)-9-fluorenone (DTFO) is introduced as an orange-emitting unit, is reported, and their application in white-light polymer light-emitting devices (PLEDs) is explored. Because of the very simple structure of DTFO, the synthetic routes to PF-DTFOx are not complicated, and the raw materials are cheap; these are advantageous in reducing the fabrication cost of white-light PLEDs. In the fluorescence spectra, PF-DTFOx in solid powder shows dual peaks at around 460 and 560 nm. In white-light PLEDs, the color of the white-light emission is tunable; this can be achieved by changing the content of DTFO in PF-DTFOx. The light-emission color varies from blue-white to pure white and orange-white when the composition of DTFO increases. All the PLEDs based on PF-DTFOx exhibit maximum luminance above 1800 cd m-2 and a color rendering index above 80. A class of white-light-emitting copolymers based on polyfluorene is synthesized, in which 2,7-di-(2-thienyl)-9-fluorenone (DTFO) is introduced as the orange-emitting unit. It can be used in white-light organic light-emitting diodes with a single light-emitting layer. The color of the white light can be tuned by changing the content of DTFO. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
fluorenone, polyfluorene, polymer light-emitting devices (PLEDs), white light
Source Publication Title
Macromolecular Chemistry and Physics
Link to Publisher's Edition
Wang, H., Yang, J., Sun, J., Xu, Y., Wu, Y., Dong, Q., Wong, W., Hao, Y., Zhang, X., & Li, H. (2014). Optical and electroluminescent studies of white-light-emitting copolymers based on poly(9,9-dioctylfluorene) and fluorenone derivatives. Macromolecular Chemistry and Physics, 215 (11), 1060-1067. https://doi.org/10.1002/macp.201400070