The form of the bigger clusters composed of aggregate ultrafine Fe particles possesses obvious fractal character and regularity.With the increase of aggregate density,the extended,compensated and collapsed states emer...The form of the bigger clusters composed of aggregate ultrafine Fe particles possesses obvious fractal character and regularity.With the increase of aggregate density,the extended,compensated and collapsed states emerge successively,and the fractal features are decreased.The ideal fractal dimension D0 of magnetic aggregate clusters is suggested between 2 and 4.展开更多
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 N...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.展开更多
文摘The form of the bigger clusters composed of aggregate ultrafine Fe particles possesses obvious fractal character and regularity.With the increase of aggregate density,the extended,compensated and collapsed states emerge successively,and the fractal features are decreased.The ideal fractal dimension D0 of magnetic aggregate clusters is suggested between 2 and 4.
基金Supported by the National Natural Science Foundation of China (Grant No. 60806047)Research Programs for Science and Technology of Chongqing Municipal Education Commission (Grant No. KJ080816)Natural Science Foundation of Chongqing Normal University (Grant No. 07XLB015)
文摘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.
