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Distance Problem01:29

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When an object's velocity changes over time, the total distance traveled can be determined by summing small displacement intervals over short increments. This approach approximates the true distance through numerical summation and the use of integral calculus. An estimate of the total displacement can be obtained by measuring velocity at regular intervals and multiplying each value by the corresponding time step.If a runner accelerates over the first three seconds of a race, speed measurements...
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To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
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In geometry, measuring the direct distance between two points on a plane is essential in various practical and theoretical applications. Whether in navigation, engineering, or computer graphics, determining the shortest path between two locations involves using the distance formula. This formula is derived from the Pythagorean Theorem, which relates the lengths of the sides of a right triangle. On a coordinate plane, the horizontal and vertical distances between two points serve as the legs of...
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Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
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通过分子尺度距离调节用于高效的有机太阳能电池的厚度不敏感的阴极间层

Wen-Jing Sun1, Ya-Ting Wang1, Jia Wang2

  • 1State Key Laboratory of Natural Product Chemistry, Key Laboratory of Special Function Materials and Structure Design (MOE), College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.

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概括

研究人员通过调整分子间距器开发了有机太阳能电池的新阴极间层材料 (CIM). 该P6材料具有出色的厚度耐受性和高效率,可实现可扩展的OSC生产.

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科学领域:

  • 材料科学
  • 有机电子
  • 太阳能发电

背景情况:

  • 阴极间层 (CIL) 对于优化有机太阳能电池 (OSC) 性能至关重要.
  • 开发用于大规模印刷的厚度不敏感的CIL材料是一个重大挑战.

研究的目的:

  • 通过灵活的结合间隔长度调节分子尺度的距离来设计高效的CIM.
  • 为OSC应用合成和评估具有不同间距长度的CIM.

主要方法:

  • 合成了三种CIM (P3,P6,P9) 用三甲,六甲和非甲间隔剂连接二胺 (PyDI) 单元.
  • 研究了间隔器长度对π-π堆叠,兴奋剂,导电性,电荷收集和激子利用的影响.
  • 使用合成的CIM制造和测试OSC设备.

主要成果:

  • P6表现出最佳的π-π堆叠,高效的Br-doping和增强的导电性,改善了电荷收集和激子利用.
  • 基于P6的二元和三元OSC实现了分别为19.90%和20.04%的高功率转换效率 (PCE).
  • P6 显示出优异的分批一致性,厚度耐受性 (在 133 nm 保持 80% 的 PCE) 和可扩展性.

结论:

  • 分子尺度距离调节策略有效设计高性能,厚度不敏感的CIM.
  • 对于工业规模生产高效的OSC,P6材料非常有前途.
  • 这种方法有助于开发下一代有机太阳能电池.