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相关概念视频

P-N junction01:11

P-N junction

A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...

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Printing Fabrication of Bulk Heterojunction Solar Cells and In Situ Morphology Characterization
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Published on: January 29, 2017

添加剂加工批量异质连接太阳能电池的时间解析结构演变.

James T Rogers1, Kristin Schmidt, Michael F Toney

  • 1Department of Materials, University of California, Santa Barbara, California 93106, USA.

Journal of the American Chemical Society
|January 27, 2012
PubMed
概括

在聚合物太阳能电池混合物中添加八乙醇 (ODT) 加快了晶体结构的形成和排序. 这种添加剂诱导的分子排序显著增强了批量异质连接形态,以提高设备性能.

科学领域:

  • 材料科学 材料科学 材料科学
  • 有机电子 有机电子
  • 太阳能光伏发电是如何实现的

背景情况:

  • 溶液沉积用像八乙醇 (ODT) 这样的高沸点添加剂是提高有机太阳能电池功率转换效率的常见方法.
  • 众所周知,添加剂会影响聚合物/富勒烯混合物的批量异质连接 (BHJ) 活性层中的相分离和分子排序.

研究的目的:

  • 为了研究溶液沉积过程中大量异质连接 (BHJ) 形态的动态演变.
  • 了解八乙醇 (ODT) 在合聚合物太阳能电池中影响结晶和排序过程中的作用.

主要方法:

  • 作为时间的函数,利用现场牧场发生广角X射线散射 (GIWAXS) 来监测BHJ进化.
  • 比较了BHJ混合物中的结构变化,这些混合物是从含有ODT的和不含有ODT的化 (CB) 中造的.

主要成果:

  • 在CB中ODT的小比例在沉积后2分钟内迅速诱导聚合物晶体的核化.
  • ODT显著增加了特定多态的定向顺序,并促进了持续的晶石核形成超过40分钟.
  • 当BHJ混合物从纯CB中造时,没有观察到类似的结构变化,这突显了ODT的关键作用.

结论:

  • 八乙醇 (ODT) 作为一种强大的核化剂,极大地加速和控制BHJ太阳能电池中合聚合物的自我组装.

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  • 添加剂介导的排序和结晶对于优化有机光伏设备的形态和性能至关重要.