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    • 4. 发明授权
    • Light-emitting electrochemical cell and system, use thereof and method for their operation
    • 发光电化学电池和系统,其使用及其操作方法
    • US09123908B2
    • 2015-09-01
    • US13138141
    • 2009-01-21
    • Ludvig EdmanJunfeng FangPiotr Matyba
    • Ludvig EdmanJunfeng FangPiotr Matyba
    • H01L51/50
    • H01L51/5032
    • A light-emitting device comprises a first electrode, a second electrode, and a light-emitting active material contacting and separating the first and second electrodes. The device comprises a combination of a conjugated polymer and an electrolyte, said electrolyte comprising ions, allowing for electrochemical doping of the conjugated polymer. In the device, a ratio between the ions and the conjugated polymer is selected to allow for the formation of:(i) a doped region at the respective electrode interface, which allows for injection and transport of electronic charge carriers into and through the doped regions, respectively, at zero or low overpotential, and(ii) an effectively undoped region, separating the doped regions, wherein injected electronic charge carriers are recombineable under excitation of the conjugated polymer and the polymer is de-excitable under the emission of light. The ratio between the ions and the conjugated polymer is low enough for the undoped region to remain effectively undoped and free from said ions, as substantially all ions in the active material are locked up in the doped regions.
    • 发光器件包括第一电极,第二电极和接触和分离第一和第二电极的发光活性材料。 该装置包括共轭聚合物和电解质的组合,所述电解质包含离子,允许共轭聚合物的电化学掺杂。 在该器件中,选择离子和共轭聚合物之间的比例以允许形成:(i)各个电极界面处的掺杂区域,其允许电子载流子注入并传输到掺杂区域 ,和(ii)分离掺杂区域的有效未掺杂区域,其中注入的电子载流子在共轭聚合物的激发下可复合,并且聚合物在光的发射下是不可激发的。 离子和共轭聚合物之间的比例足够低,使得未掺杂的区域保持有效地未掺杂并且不含所述离子,因为活性材料中基本上所有的离子被锁定在掺杂区域中。