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相关概念视频

Velocity Potential01:20

Velocity Potential

407
In steady, incompressible flow through a long, straight pipe with a uniform cross-section, the flow in the central region (far from the pipe walls) is irrotational. This irrotational nature means that fluid particles do not rotate around their axes, and a scalar function called the velocity potential, represented by ϕ, can be used to describe their movement. In irrotational flows, the velocity field V is defined as the gradient of the velocity potential:
407
Ventilatory Modes01:14

Ventilatory Modes

250
Mechanical ventilators are life-saving devices that support or replace spontaneous breathing. They deliver breaths to patients through varying methods known as ventilator modes. Understanding these modes is critical for healthcare providers managing patients with respiratory failure.
There are three ventilatory modes: full support, partial support, and spontaneous. These are described below.
Full Support Modes
Full support modes include controlled mechanical ventilation, continuous mandatory...
250
Virtual Work01:20

Virtual Work

892
The principle of virtual work states that if a body is in static and dynamic equilibrium, then the sum of all the virtual work done by all external forces and couple moments for any given virtual displacement must be zero.
In static equilibrium, a body can experience an imaginary or virtual movement, such as displacement or rotation. The virtual work done by a force is equal to the dot product of force and virtual displacement in the direction of the force. When it comes to virtually rotating a...
892
Air-entraining Agents01:27

Air-entraining Agents

99
Air-entraining agents improve the durability and workability of concrete in climates with frequent freezing and thawing. These agents prevent cracks by introducing small air bubbles into the mix, creating spaces accommodating water expansion when temperatures drop. The air-entraining agents lower the surface tension of water, forming stable, small air bubbles. This method is more effective than having accidental large voids, as the intentional, smaller, and evenly distributed air voids improve...
99
Veneer01:19

Veneer

112
Veneer refers to a thin sheet of wood, typically produced to a thickness of about one-eighth of an inch or less. This material is crafted through various methods, the most common being rotary cutting. In this process, a log is mounted into a large lathe and spun against a knife edge, peeling off a continuous strip of wood as the knife penetrates deeper into the rotating log, creating a rotary-cut veneer.
Other veneering techniques include plain-slicing, quarter-slicing, and rift-slicing. These...
112
Mechanical Ventilation I: Indication and Settings01:29

Mechanical Ventilation I: Indication and Settings

549
Mechanical ventilation is a life-saving technique for managing acute respiratory failure and other respiratory complications. The process involves using a machine known as a ventilator to supply oxygen to the lungs and assist in removing carbon dioxide. It serves as a bridge to long-term mechanical ventilation or a temporary measure until ventilatory support is discontinued. The ventilator can maintain this function for a prolonged period, providing critical support for patients until they can...
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Automated Deployment of an Internet Protocol Telephony Service on Unmanned Aerial Vehicles Using Network Functions Virtualization
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使用 VO VO 的方法.

Han Bin Cho1, Ju Yeon Han1, Ha Jun Kim1

  • 1Division of Materials Science and Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea.

ACS applied materials & interfaces
|June 8, 2023
PubMed
概括

使用VO2和PEDOT:PSS的双层孔注入层 (HIL) 显著提高了量子点发光二极管 (QLED) 的效率. 这一策略减少了能源障碍,提高了高级显示应用的性能.

关键词:
孔的注入层是孔的注入层.光的提取光的提取.量子点发光二极管是一种量子点发光二极管.快速的热化 热化热稳定性的热稳定性二氧化瓦纳二氧化是什么

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科学领域:

  • 光电学是指光电子产品.
  • 材料科学 材料科学 材料科学
  • 量子点技术 量子点技术是一种量子点技术.

背景情况:

  • 量子点发光二极管 (QLED) 是下一代显示器的关键.
  • 聚乙烯二氧化硫酸 (PEDOT:PSS) 是一个标准的孔注射层 (HIL),但有局限性.
  • 在PEDOT:PSS HIL中高能障碍阻碍了孔注入,降低了QLED的效率.

研究的目的:

  • 调查一种新的双层HIL策略,以提高QLED性能.
  • 为了解决PEDOT:PSS中的能量障碍问题,用于增强孔注入的PSS HIL.
  • 通过先进的HIL工程来优化QLED效率.

主要方法:

  • 使用由VO2和PEDOT:PSS组成的双层HIL制造QLED.
  • 设备性能的表征,包括外部量子效率 (EQE),电流效率 (CE) 和亮度.
  • 使用VO2插入在ITO/HIL接口降低能量屏障的分析.

主要成果:

  • 双层HIL QLED实现了18%的EQE,78 cd/A CE,以及25771 cd/m2的发光率.
  • 与单层PEDOT:PSS HIL QLED (13%EQE,54cd/A CE,14,817cd/m2发光率) 相比,双层结构显示出显著的改进.
  • 插入VO2有效地降低了ITO和PEDOT:PSS之间的能量屏障,促进了更好的孔注入.

结论:

  • 包含VO2和PEDOT:PSS的双层HIL在提高QLED效率方面非常有效.
  • 降低 ITO / HIL 接口上的能量屏障对于改善充电注入和整体设备性能至关重要.
  • 这种双层HIL方法为开发高性能QLED设备提供了有希望的途径.