標題: | Polarized white emission from fluorene-based polymer blends |
作者: | Yao, YH Kung, LR Hsu, CS 應用化學系 Department of Applied Chemistry |
關鍵字: | polarized white light emission;liquid crystalline polymer;host-guest system |
公開日期: | 1-十月-2005 |
摘要: | Three alternating co-polyfluorenes emitting primary red, green and blue (RGB) colors have been synthesized via a palladium-catalyzed Suzuki coupling reaction. All copolymers reveal good thermal stability and nematic liquid crystalline behavior. The polymers were fabricated to form a polarized electroluminescent device using poly(ethylene dioxythiophene)-poly(styrene sulfonicacid) (PEDOT-PSS) as an alignment layer. For the case of primary colors, a host-guest approach that utilized a blue light emission P1 as a host with a green light P2 or a red light P3 as a guest led to approximately two- to fourfold enhancement in luminescence in comparison with that of a neat film in polymer light emitting diodes (PLEDs), 1039 versus 2205cd/m(2) and 284 versus 1146cd/m(2). In the case of white light, as a consequence of blending, polarized emission peak ratio of up to 4.4 and a pure white luminance brightness of up to 1895cd/m(2) have been attained. |
URI: | http://dx.doi.org/10.1143/JJAP.44.7648 http://hdl.handle.net/11536/13201 |
ISSN: | 0021-4922 |
DOI: | 10.1143/JJAP.44.7648 |
期刊: | JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS |
Volume: | 44 |
Issue: | 10 |
起始頁: | 7648 |
結束頁: | 7653 |
顯示於類別: | 期刊論文 |