Bright hybrid white light-emitting quantum dot device with direct charge injection into quantum dot

A bright white quantum dot light-emitting device(white-QLED) with 4-[4-(1-phenyl-1H-benzo[d]imidazol-2-yl)phenyl]-2- [3-(tri-phenylen-2-yl)phen-3-yl]quinazoline deposited on a thin film of mixed green/red-QDs as a bilayer emitter is fabricated. The optimized white-QLED exhibits a turn-on voltage of 3.2 V and a maximum brightness of 3660 cd/m~2@8 V with the Commission Internationale de l'Eclairage(CIE) chromaticity in the region of white light. The ultra-thin layer of QDs is proved to be critical for the white light generation in the devices. Excitation mechanism in the white-QLEDs is investigated by the detailed analyses of electroluminescence(EL) spectral and the fluorescence lifetime of QDs. The results show that charge injection is a dominant mechanism of excitation in the white-QLED.     

关于(44)~Ca核的一个简化模型的计算

本文用折线图的微观理论定义0f-1p壳的“对”,并以这些“对”作为基础来构成~(40)Ca外有四个价中子的模型空间,计算了~(44)Ca的低能谱,结果表明,用这一模型空间大为缩小的简化模型,对具有同类价核子的~(44)Ca低能谱,只包括S,D,G和I“对”就能得到与实验值很好的符合