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以具有高离化能的n型小分子材料PBD、BCP作为激子限制层,用交替沉积的方式制备了分别以Alq3/PBD、NPB/BCP为周期结构多发光层的绿光、蓝光器件.周期性多发光层结构的引入大大提高了器件性能,其中,具有双周期3发光层的绿光器件最大亮度和效率分别是常规器件的10.5倍和4.4倍,具有双周期双发光层的蓝光器件最大亮度和效率分别是常规器件的2.75和1.45倍.器件性能提高的主要原因是周期性结构的引入和多发光区域的划分增加了激子产生几率.同时,周期数对器件性能有重要影响.绿光、蓝光器件电致发光(EL)谱谱峰值基本稳定,半高谱宽出现了窄化. 相似文献
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Organic electroluminescence (OEL) has been ex-tensively studied owing to its potential application inflat panel displays ever since the first double-layerOELdevice that has high efficiency and luminescencewas fabricated in 1987[1 ~4]. When compared withcommon smaller organic molecules and polymers ,rareearth (RE) complexes exhibit extremely sharp , well-defined spectral lines due to the emissions that origi-nate fromthe lanthanide metal ions .So the electrolu-minescence (EL) of REcomplexes… 相似文献
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