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DNA Based Hybrid Material for Interface Engineering in Polymer Solar Cells.

Anders Elfwing1, Wanzhu Cai1, Liangqi Ouyang1

  • 1Biomolecular and Organic Electronics, Department of Physics, Chemistry and Biology , Linköping University , SE-581 83 Linköping , Sweden.

ACS Applied Materials & Interfaces
|March 6, 2018
PubMed
Summary

A novel printable electron transport material (ETM) using DNA and PEDOT-S enhances organic photovoltaic devices. This new material offers comparable performance to traditional cathodes, enabling efficient and printable solar cell technology.

Keywords:
DNA based hybrid materialelectron transport materialhigh optical transmittanceorganic photovoltaic deviceself-doped polyelectrolyte

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Renewable Energy

Background:

  • Organic photovoltaic devices (OPV) require efficient electron transport materials (ETMs) for optimal performance.
  • Traditional ETMs often involve complex fabrication processes and limited material choices.
  • Developing solution-processable and printable ETMs is crucial for advancing OPV technology.

Purpose of the Study:

  • To introduce a new, solution-processable electron transport material (ETM) for bulk-heterojunction organic photovoltaic devices (OPV).
  • To evaluate the performance of the novel ETM in comparison to traditional cathode materials.
  • To elucidate the roles of the composite components in achieving desired electronic and optical properties.

Main Methods:

  • Synthesis of a novel electron transport material (ETM) comprising poly(4-(2,3-dihydrothieno[3,4-b][1,4]dioxin-2-yl-methoxy)-1-butanesulfonic acid) (PEDOT-S) and surfactant-functionalized deoxyribonucleic acid (DNA) (DNA:CTMA:PEDOT-S).
  • Fabrication of bulk-heterojunction organic photovoltaic devices (OPV) incorporating the DNA:CTMA:PEDOT-S modified cathode.
  • Characterization of device performance, including fill factor, open circuit voltage, and power conversion efficiency, compared to devices with lithium fluoride/aluminum cathodes.

Main Results:

  • The DNA:CTMA:PEDOT-S ETM demonstrated high optical transmittance, a suitable work function, and selective electron transport.
  • Organic photovoltaic devices (OPV) utilizing the new ETM exhibited performance metrics (fill factor, open circuit voltage, power conversion efficiency) comparable to those with traditional LiF/Al cathodes.
  • The surfactant cetyltrimethylammonium chloride (CTMA) induced a dipole effect, lowering the electrode work function, while the DNA:CTMA complex acted as an optical absorption dilutor.

Conclusions:

  • The developed DNA:CTMA:PEDOT-S material serves as an effective electron transport layer (ETL) for organic photovoltaic devices (OPV).
  • The material's properties, including tunable work function and optical characteristics, facilitate high-performance, printable solar cells.
  • This materials design strategy opens new avenues for optimizing printable interface materials in electronic devices.