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Roll-to-Roll Processing of Inverted Polymer Solar Cells using Hydrated Vanadium(V)Oxide as a PEDOT:PSS Replacement.

Nieves Espinosa1, Henrik Friis Dam2, David M Tanenbaum3

  • 1Department of Electronics, Computing and projects, Technical University of Cartagena, Campus Muralla del Mar. C/Doctor Fleming s/n, 30202 Cartagena, Spain. nieves.espinosa@upct.es.

Materials (Basel, Switzerland)
|September 8, 2017
PubMed
Summary

This study investigates hydrated vanadium(V)oxide as a hole transport layer in polymer solar cells, achieving up to 0.4% efficiency in single cells and 0.18% in modules using roll-to-roll processing.

Keywords:
PEDOT:PSS freehydrated vanadium(V)oxidepolymer solar cellsroll-to-roll printing/coatingsolution processing

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Photovoltaics

Background:

  • Polymer solar cells (PSCs) commonly use PEDOT:PSS as a hole transporting layer.
  • Developing stable and efficient PSCs is crucial for renewable energy advancement.

Purpose of the Study:

  • To explore hydrated vanadium(V)oxide as a potential replacement for PEDOT:PSS in PSCs.
  • To optimize the hydrated vanadium(V)oxide layer thickness for improved device performance.

Main Methods:

  • Fabrication of PSCs and modules using full roll-to-roll (R2R) processing on flexible PET substrates.
  • Slot-die coating of hydrated vanadium(V)oxide from a vanadyl-triisopropoxide (VTIP) precursor solution.
  • Characterization of V₂O₅·(H₂O)n layers using SEM, EDS, and GWAXS; device performance and stability testing.

Main Results:

  • Achieved power conversion efficiencies (PCE) of 0.4% for single cells and 0.18% for modules.
  • Demonstrated R2R processability for all layers, including screen printing for electrodes and slot-die coating for active and V₂O₅·(H₂O)n layers.
  • Stability tests were conducted over three weeks under indoor and outdoor conditions using a solar tracker.

Conclusions:

  • Hydrated vanadium(V)oxide shows promise as a hole transporting material in PSCs.
  • R2R processing enables scalable fabrication of flexible PSCs with this material.
  • Further optimization is needed to enhance module efficiency and long-term stability.