Highly efficient stacked organic light-emitting devices employing a novel intermediate layer

• 出 处: Science in China(Series E:Technological Sciences)
• 发表日期: 2009年01期
• 关键词: Highly brightness doubling diphenyl naphthyl biphenyl indium diamine evaporation

Highly efficient stacked organic light-emitting devices (OLEDs) have been fabricated using Mg:Alq3:BCP/ WO3 as a novel intermediate layer, which connects two identical emissive units. The stacked OLEDs consisting of NPB/Alq3 exhibited high current efficiency and brightness characteristics over conven- tional single-unit device. At 200 mA/cm2, the current efficiency of the stacked OLEDs using the inter- mediate layers of Mg:Alq3:BCP/WO3 were about 6.85 cd/A, doubling that of the conventional device. The results may prove the method to be effective to enhance the current efficiency and brightness of OLEDs.

Highly efficient stacked organic light-emitting devices (OLEDs) have been fabricated using Mg: Alq3: BCP / WO3 as a novel intermediate layer, which connects two identical emissive units. The stacked OLEDs consisting of NPB / Alq3 exhibited high current efficiency and brightness characteristics At current 200 mA / cm2, the current efficiency of the stacked OLEDs using the inter-mediate layers of Mg: Alq3: BCP / WO3 were about 6.85 cd / A, doubling that of the conventional device. The results may prove the method to be effective to enhance the current efficiency and brightness of OLEDs.