It is still challenging to obtain broadband emission covering visible light spectrum as much as possible with negligible angular dependence. In this work, we demonstrate a low driving voltage top-emitting white organi...It is still challenging to obtain broadband emission covering visible light spectrum as much as possible with negligible angular dependence. In this work, we demonstrate a low driving voltage top-emitting white organic light-emitting diode （TEWOLED） based on complementary blue and yellow phosphor emitters with negligible angular dependence. The bottom copper anode with medium reflectance, which is compatible with the standard complementary metal oxide semiconductor （CMOS） technology below 0.13 μm, and the semitransparent multi- layer Cs2CO3/AI/Cu cathode as a top electrode, are introduced to realize high-performance TEWOLED. Our TEWOLED achieves high efficiencies of 15.4callA and 12.1 1m/W at a practical brightness of lO00cd/m2 at low voltage of 4 V.展开更多
We report on a white hybrid light-emitting device employing a mixture of ternary CdSe/ZnS quantum dots(QDs)as an emitting layer(EML)and a small molecular material tris(8-hydroxyquinoline)aluminum(Alq3)as an electron-t...We report on a white hybrid light-emitting device employing a mixture of ternary CdSe/ZnS quantum dots(QDs)as an emitting layer(EML)and a small molecular material tris(8-hydroxyquinoline)aluminum(Alq3)as an electron-transporting layer.The film morphology of the spin-coated mixture of QDs is strongly improved via thermal annealing,and therefore a close-packed QD-EML is realized between organic charge-transporting layers.As a result,compared to the device with an unannealed QD-EML,the emission of Alq3 is deeply suppressed.In addition,a maximum luminance of more than 1000 cd/m2 and a maximum luminous efficiency of 2.2 cd/A are achieved.展开更多
基金Supported by the National Basic Research Program of China under Grant No 2010CB327701the National Natural Science Foundation of China under Grant No 61275033
文摘It is still challenging to obtain broadband emission covering visible light spectrum as much as possible with negligible angular dependence. In this work, we demonstrate a low driving voltage top-emitting white organic light-emitting diode （TEWOLED） based on complementary blue and yellow phosphor emitters with negligible angular dependence. The bottom copper anode with medium reflectance, which is compatible with the standard complementary metal oxide semiconductor （CMOS） technology below 0.13 μm, and the semitransparent multi- layer Cs2CO3/AI/Cu cathode as a top electrode, are introduced to realize high-performance TEWOLED. Our TEWOLED achieves high efficiencies of 15.4callA and 12.1 1m/W at a practical brightness of lO00cd/m2 at low voltage of 4 V.
基金Supported by the National Basic Research Program of China under Grant No 2010CB327701the National Natural Science Foundation of China under Grant Nos 60977024 and 60907021.
文摘We report on a white hybrid light-emitting device employing a mixture of ternary CdSe/ZnS quantum dots(QDs)as an emitting layer(EML)and a small molecular material tris(8-hydroxyquinoline)aluminum(Alq3)as an electron-transporting layer.The film morphology of the spin-coated mixture of QDs is strongly improved via thermal annealing,and therefore a close-packed QD-EML is realized between organic charge-transporting layers.As a result,compared to the device with an unannealed QD-EML,the emission of Alq3 is deeply suppressed.In addition,a maximum luminance of more than 1000 cd/m2 and a maximum luminous efficiency of 2.2 cd/A are achieved.
