【摘 要】
：
In blue quantum dot light emitting diodes (QLEDs),electron injection is insufficient,which would degrade device efficiency and stability.Herein,we employ chlorine passivated ZnO nanoparticles as electron transport layer to facilitate electron injection in
【机 构】
：
Key Laboratory of Energy Conversion and Storage Technologies (Ministry of Education),Southern Univer
论文部分内容阅读
In blue quantum dot light emitting diodes (QLEDs),electron injection is insufficient,which would degrade device efficiency and stability.Herein,we employ chlorine passivated ZnO nanoparticles as electron transport layer to facilitate electron injection into QDs effectively.Moreover,it suppresses exciton quenching at the QD/ZnO interface by blocking charge transfer channel.As a result,the maximum external quantum efficiency of blue QLED was increased from 2.55％to 4.60％,and the operation lifetime of blue QLED was nearly 4 times longer than that of the control device.Our work indicates that election injection plays an important role in blue QLED efficiency and stability.
其他文献
对2020年高考全国Ⅱ卷物理第7题关于上下半圆均匀分布等量异种电荷的细圆环平面内电势和电场分布进行理论分析和定量计算,得到圆环平面内电势和电场强度的表达式.并利用Mathematica软件,绘制分布图和矢量图,将该物理模型电场和电势分布可视化.得出以下结论:(1)圆环中心处电势为零;位于y＞0区域的点,电势为正值;位于y＜0区域的点,电势为负值;电势 关于y轴具有对称性.(2)圆环平面内电场强度的大小关于x、y轴具有对称性.中心处电场强度最小,越靠近环电场强度越大.
本文以“生活中的透镜”为例,详细阐述如何利用近几年备受关注的STEAM教育理念来具体落实物理学科核心素养,采用基于问题和项目式的STEAM跨学科教学形式,引导学生利用跨学科的思维方式解决问题,培养学生的综合实践创新能力.提供一种基于问题和项目式的STEAM学习物理课程开发思路,设计进阶式的实验教学流程,并采用5E教学模式对教学案例设计进行评估.
Two-dimensional ferromagnetic van der Waals (2D vdW) heterostructures have opened new avenues for creating artificial materials with unprecedented electrical and optical functions beyond the reach of isolated 2D atomic layered materials,and for manipulati
Chirality is ubiquitous in natural world.Although with similar physical and chemical properties,chiral enantiomers could play different roles in biochemical processes.Discrimination of chiral enantiomers is extremely important in bio-chemical,analytical c
Magnetic two-dimensional (2D) van der Waals (vdWs) materials and their heterostructures attract increasing attention in the spintronics community due to their various degrees of freedom such as spin,charge,and energy valley,which may stimulate potential a
A theory of multiphoton photoemission is derived to explain the experimentally observed monotonic decrease with the wavelength in the electron yield of TiO2 nanoparticles (NPs) by as large as four orders of magnitude.It is found that the fitting parameter
Photonic-plasmonic hybrid microcavities,which possess a higher figure of merit Q/V (the ratio of quality factor to mode volume) than that of pure photonic microcavities or pure plasmonic nano-antennas,play key roles in enhancing light-matter interaction.I
A surrounding electromagnetic environment can engineer spontaneous emissions from quantum emitters through the Purcell effect.For instance,a plasmonic antenna can efficiently confine an electromagnetic field and enhance the fluorescent process.In this stu
Recent years,huge progress of first-principles methods has been witnessed in calculating the quasiparticle band gaps,with many-body perturbation theory in the GW approximation being the standard choice,where G refers to Green\'s function and W denotes t
Motivated by the fact that Weyl fermions can emerge in a three-dimensional topological insulator on breaking either time-reversal or inversion symmetries,we propose that a topological quantum phase transition to a Weyl semimetal phase occurs under the off