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Related Concept Videos

Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
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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Related Experiment Video

Updated: May 10, 2026

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
06:49

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation

Published on: March 2, 2021

Ultrafast charge-generation dynamics through interfacial energetic modulation for high-performance single-component

Yao Li1, Yongmin Luo1, Yulong Hai1

  • 1Thrust of Advanced Materials, Function Hub, The Hong Kong University of Science and Technology (Guangzhou), Guangzhou, China.

Nature Communications
|May 8, 2026
PubMed
Summary

Fluorination of double-cable polymers (DCPs) in single-component organic solar cells (SCOSCs) enhances efficiency and stability. This strategy accelerates charge generation, leading to improved performance in next-generation organic solar cells.

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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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Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells
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Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells

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Related Experiment Videos

Last Updated: May 10, 2026

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
06:49

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation

Published on: March 2, 2021

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

Published on: January 10, 2017

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells
14:37

Ambient Method for the Production of an Ionically Gated Carbon Nanotube Common Cathode in Tandem Organic Solar Cells

Published on: November 5, 2014

Area of Science:

  • Materials Science
  • Organic Electronics
  • Photovoltaics

Background:

  • Bulk heterojunction (BHJ) organic solar cells (OSCs) face stability issues due to phase separation.
  • Single-component OSCs (SCOSCs) offer enhanced stability via covalently linked donor-acceptor units but have limited efficiency.
  • Inefficient charge generation in SCOSCs stems from intermixed morphologies.

Purpose of the Study:

  • To develop a fluorinated double-cable polymer (DCP) for improved SCOSC efficiency and stability.
  • To investigate the impact of fluorination on charge generation dynamics and morphology.
  • To establish a unified strategy for enhancing charge generation in organic solar cells.

Main Methods:

  • Synthesis of a fluorinated double-cable polymer (DCPY2-F).
  • Fabrication and characterization of SCOSCs and binary blend devices.
  • Ultrafast spectroscopy (pump-probe transient absorption, pump-push-probe) and steady-state electroluminescence.
  • Molecular dynamics simulations.

Main Results:

  • DCPY2-F achieved a record 14.8% efficiency with a 26.83 mA cm-2 short-circuit current density.
  • Fluorination accelerated interfacial charge transfer and long-range charge separation dynamics.
  • Reduced reorganization energy and narrower charge transfer state distributions were observed.
  • Strengthened non-covalent interactions promoted ordered donor-acceptor interfaces.
  • Fluorination enhanced charge-transfer dynamics and photocurrent in binary blends.

Conclusions:

  • Fluorination is a viable strategy to accelerate charge generation dynamics in SCOSCs and binary blends.
  • Structurally and energetically ordered interfacial states are key to efficient charge generation.
  • This work provides mechanistic insights for optimizing single-component organic solar cells.