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Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity01:15

Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity

265
Deformation occurs in axial and transverse directions when an axial load is applied to a slender bar. This deformation impacts the cubic element within the bar, transforming it into either a rectangular parallelepiped or a rhombus, contingent on its orientation. This transformation process induces shearing strain. Axial loading elicits both shearing and normal strains. Applying an axial load instigates equal normal and shearing stresses on elements oriented at a 45° angle to the load axis.
265

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通过增加刚性来提高OLED发射器的效率.

Mahendra Godi1, Hyukmin Kwon1, Sangwook Park1

  • 1Integrated Engineering, Department of Chemical Engineering, Kyung Hee University Gyeonggi 17104 Republic of Korea jongpark@khu.ac.kr.

RSC advances
|March 11, 2024
PubMed
概括

为了先进的光电子,开发了三种新的蓝光发射材料. CN-PAI-InCz在非兴奋剂设备中表现出卓越的性能,显示出高效率和平衡的电荷传输,用于增强蓝色排放应用.

科学领域:

  • 材料科学 材料科学 材料科学
  • 有机电子 有机电子
  • 光物理学的光学物理学

背景情况:

  • 开发高效和稳定的蓝色发射器对于有机发光二极管 (OLED) 来说至关重要.
  • 实现高效率和良好的电荷平衡的深蓝色排放仍然是现场的一个挑战.

研究的目的:

  • 合成和描述新型蓝光发射材料,以在光电子设备中潜在使用.
  • 研究影响新有机化合物的光物理和电发光性质的结构性质关系.

主要方法:

  • 三种新的蓝色材料的合成:TPI-InCz,PAI-InCz和CN-PAI-InCz.
  • 无兴奋剂有机发光二极管 (OLED) 设备的制造和特征.
  • 光物理测量包括排放光谱和电光效率.
  • 使用只有孔和只有电子的设备进行电荷传输研究,以评估电荷平衡.
  • 国际照明委员会 (CIE) 坐标的确定.

主要成果:

  • TPI-InCz和PAI-InCz分别在411nm和431nm处呈现深蓝色的排放峰值.
  • CN-PAI-InCz在蓝色区域显示了排放,峰值在452nm.
  • 在非兴奋剂设备中,CN-PAI-InCz实现了最高的电流效率 (2.91 cd A-1),功率效率 (1.93 lm W-1) 和外部量子效率 (3.31%).

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  • 由于CN集团的引入,CN-PAI-InCz证明了优越的费用平衡.
  • PAI-InCz显示出快速的孔移动性 (1.50 × 10−3 厘米−2 V−1 s−1) 归因于其刚性结构.
  • 所有在蓝色区域发出的制造设备,由CIE坐标证实.

    • 结论:

    • 新开发的材料,特别是CN-PAI-InCz,显示出在光电子应用中有效发射蓝光的巨大潜力.
    • 引入CN组有效地提高了电荷平衡和设备性能.
    • 分子设计,包括平面和刚性结构,在实现高电荷移动性和高效排放方面发挥着关键作用.