在包含单尺寸和多尺寸合体CdSe量子点阵列的连接处采集取决于尺寸的电荷
Emily A Weiss1, Ryan C Chiechi, Scott M Geyer
1Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, USA.
Journal of the American Chemical Society
|December 13, 2007
概括
这项研究比较了量子点 (QD) 连接的电特性,使用单尺寸和多尺寸的QD. QD的大小和位置显著影响接口性能,影响电荷传输和设备特性.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 固态物理 固态物理
背景情况:
- 体量子点 (QD) 为先进的电子设备提供可调节的电子特性.
- 了解三维QD数组中的电荷传输对于设备优化至关重要.
- 质量测量器和电极之间的接口对接口的电气特性有很大影响.
研究的目的:
- 为了研究由化 (CdSe) 量子点3D阵列所形成的连接的电特性.
- 为了比较单个大小的 QD 与多个大小的 QD 的交叉点的性能.
- 评估QD大小和位置对跨界面的电荷传输的影响.
主要方法:
- 使用配氧化 (ITO) /聚3,4-乙烯二氧化:聚硫酸盐 (PEDOT:PSS) 和欧性Ga-In (EGaIn) 电极的状CdSe量子点 (QD) 制造连接点.
- 制造的二极管连接点的电气特性.
- 马库斯模型的应用来估计电荷转移障碍.
主要成果:
- 发现二极管接口的开启电压取决于与PEDOT:PSS电极相邻的QD的大小.
- 对单尺寸和多尺寸QD连接点的比较揭示了接口传输对整体电气性质的不同贡献.
- 在交叉口内不同QD大小的位置被证明会影响这些运输贡献.
结论:
- 在3D阵列中的QD大小和排列极大地影响了交叉点的电气行为.
- 马库斯模型为了解QD/PEDOT:PSS接口上的电荷传输障碍提供了一个框架.
- 这项研究提供了通过控制QD尺寸分布和放置来优化基于QD的电子设备的见解.
相关概念视频
Trends in Lattice Energy: Ion Size and Charge
26.6K
An ionic compound is stable because of the electrostatic attraction between its positive and negative ions. The lattice energy of a compound is a measure of the strength of this attraction. The lattice energy (ΔHlattice) of an ionic compound is defined as the energy required to separate one mole of the solid into its component gaseous ions. For the ionic solid sodium chloride, the lattice energy is the enthalpy change of the process:
26.6K
Cell Size
126.6K
Cell sizes vary widely among and within organisms. Bacterial cells range between 1-10 micrometers (μm)and are considerably smaller than most eukaryotic cells. The smallest bacteria are 0.1 μm in diameter—about a thousand times smaller than eukaryotic cells, which typically range from 10-100 μm.
Surface Area
Cells can take in nutrients and water via diffusion through the plasma membrane itself or through specific channels in the membrane. The area of the membrane surrounding...
Surface Area
Cells can take in nutrients and water via diffusion through the plasma membrane itself or through specific channels in the membrane. The area of the membrane surrounding...
126.6K
Brick Sizes
322
Brick sizing plays a crucial role in construction, influencing both the aesthetics and structural integrity of buildings. Bricks are defined by three dimensions: width, thickness, and length. They are commonly designed to fit modular measurements, typically in multiples of 4 inches or 8 inches in width, to facilitate uniform construction and compatibility with other building materials.
Modular bricks are the most common type and are sized to include the mortar joint, which is essential for...
Modular bricks are the most common type and are sized to include the mortar joint, which is essential for...
322
Genome Size and the Evolution of New Genes
9.0K
While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
9.0K
Genome Size and the Evolution of New Genes
3.3K
No description available
3.3K
Maximum Size of Aggregate
536
The maximum size of aggregate is defined as the aperture of the sieve retaining 15 percent or more of the particles present in the aggregate sample. The aggregate's maximum size impacts the concrete's water requirement, workability, and strength. Larger aggregates reduce the surface area needing cement paste coverage, which can lower water needs, thereby allowing a decrease in the water-to-cement ratio when the desired workability and richness of the mix are to be maintained, which can...
536


