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Related Concept Videos

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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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Related Experiment Video

Updated: May 26, 2026

Well-aligned Vertically Oriented ZnO Nanorod Arrays and their Application in Inverted Small Molecule Solar Cells
09:32

Well-aligned Vertically Oriented ZnO Nanorod Arrays and their Application in Inverted Small Molecule Solar Cells

Published on: April 25, 2018

High-efficiency inverted polymer solar cells with double interlayer.

Jegadesan Subbiah1, Chad M Amb, Irfan Irfan

  • 1Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611, United States.

ACS Applied Materials & Interfaces
|January 10, 2012
PubMed
Summary
This summary is machine-generated.

Inverted polymer solar cells using ZnO and MTDATA interlayers achieved 6.45% power conversion efficiency, outperforming conventional cells. This enhancement in organic solar cell performance is attributed to improved charge extraction and morphology.

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Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
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Last Updated: May 26, 2026

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Published on: April 25, 2018

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Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
08:29

Morphology Control for Fully Printable Organic–Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer

Published on: January 10, 2017

Area of Science:

  • Materials Science
  • Organic Electronics
  • Photovoltaics

Background:

  • Bulk-heterojunction solar cells are a key area of organic electronics research.
  • Performance limitations in conventional polymer solar cells include charge recombination and inefficient extraction.

Purpose of the Study:

  • To investigate the performance enhancement of inverted polymer solar cells.
  • To evaluate the impact of interlayers on charge extraction and device efficiency.

Main Methods:

  • Fabrication and characterization of normal and inverted bulk-heterojunction solar cells.
  • Utilizing poly[(4,4'-bis(2-ethylhexyl)dithieno[3,2-b:2',3'-d]silole)-2,6-diyl-alt-(2,1,3-benzothiadiazole)-4,7-diyl] (PDTS-BTD) and {6,6}-phenyl-C71 butyric acid methyl ester (PC(71)BM) as the active layer.
  • Employing ZnO nanoparticles, MoO(3), and 4,4',4″-tris[N-(3-methylphenyl)-N-phenylamino]triphenylamine (MTDATA) as interlayers.

Main Results:

  • Inverted solar cells with ZnO and MTDATA/MoO(3) interlayers achieved a power conversion efficiency of 6.45%.
  • Conventional cells exhibited a power conversion efficiency of 4.91%.
  • Ultraviolet photoemission spectroscopy confirmed enhanced hole extraction due to interlayer-induced band bending.

Conclusions:

  • The use of specific interlayers significantly improves the performance of inverted polymer solar cells.
  • Efficient charge extraction and optimized vertical morphology are crucial for high-efficiency organic photovoltaics.