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Related Experiment Video

Updated: Apr 6, 2026

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
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Nanostructured Electron-Selective Interlayer for Efficient Inverted Organic Solar Cells.

Jiyun Song1, Jaehoon Lim2,3, Donggu Lee1

  • 1Department of Electrical and Computer Engineering, Inter-university Semiconductor Research Center, Seoul National University , 1, Gwanak-ro, Gwanak-gu, Seoul 151-744, Korea.

ACS Applied Materials & Interfaces
|August 5, 2015
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel nanostructured interlayer using Indium-doped Zinc Oxide (ZnO:In) and Cadmium Selenide (CdSe) tetrapods. This interlayer enhances electron transport and reduces recombination in polymer:fullerene solar cells, boosting efficiency.

Keywords:
CdSe tetrapodsbulkheterojunctionelectron buffer layerelectron-selective interlayernanostructured extraction layerorganic−inorganic hybrid solar cells

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Photovoltaics

Background:

  • Inverted polymer:fullerene bulk heterojunction (BHJ) solar cells require efficient electron-selective interlayers.
  • Existing interlayers often face challenges with charge recombination and transport.

Purpose of the Study:

  • To develop and investigate a novel nanostructured electron-selective interlayer for improved BHJ solar cell performance.
  • To understand the role of dimension-controlled Cadmium Selenide (CdSe) tetrapods in enhancing device characteristics.

Main Methods:

  • Fabrication of an electron-selective interlayer using Indium-doped Zinc Oxide (ZnO:In) and vertically aligned CdSe tetrapods.
  • Integration of the nanostructured interlayer into PTB7:PC70BM based inverted BHJ solar cells.
  • Characterization of device performance, including short circuit current, fill factor, and power conversion efficiency.

Main Results:

  • The nanostructured interlayer provided a direct inorganic electron transport pathway.
  • CdSe tetrapods reduced recombination losses and improved hole-blocking and electron-transporting properties.
  • Power conversion efficiency of PTB7:PC70BM solar cells increased to 7.55%.

Conclusions:

  • The unique nanostructured electron-selective interlayer significantly enhances charge extraction in organic solar cells.
  • This approach offers a general platform for improving the performance of various organic photovoltaic devices.
  • The study highlights the potential of combining inorganic nanostructures with organic active layers for next-generation solar cells.