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Related Concept Videos

P-N junction01:11

P-N junction

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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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Updated: Mar 15, 2026

Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
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Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

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Printing Hybrid, Interdigitated Back-Contact Solar Cells.

Guancheng Li1, David Angel Trujillo1, Robert L Opila1

  • 1Materials Science and Engineering, University of Delaware, Newark, DE 19716, USA.

Materials (Basel, Switzerland)
|March 14, 2026
PubMed
Summary
This summary is machine-generated.

Inkjet printing enables the fabrication of interdigitated back-contact solar cells using common materials. This method simplifies production by eliminating vacuum deposition, enhancing efficiency through improved materials and surface passivation.

Keywords:
PEDOT:PSSheterojunctioninkjet printinginterdigitated back-contactsphotovoltaicssolar cells

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Area of Science:

  • Materials Science
  • Renewable Energy
  • Photovoltaics

Background:

  • Interdigitated back-contact (IBC) solar cells offer high efficiency potential.
  • Traditional IBC fabrication involves complex processes like vacuum deposition and diffusion.
  • Developing low-cost, scalable manufacturing methods for IBC solar cells is crucial.

Purpose of the Study:

  • To demonstrate the feasibility of fabricating IBC solar cells entirely via inkjet printing.
  • To investigate the impact of material modifications and surface passivation on device performance.
  • To compare the performance of printed IBC solar cells with conventionally fabricated devices.

Main Methods:

  • Inkjet printing of poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS), TiO2, and metal contacts onto a textured silicon substrate.
  • Application of co-solvent to PEDOT:PSS and passivation of the silicon surface.
  • Characterization of printed solar cell performance, including short-circuit current (Jsc), fill factor, and efficiency.

Main Results:

  • Successfully fabricated IBC solar cells using only an inkjet printer, eliminating the need for vacuum deposition.
  • Optimized PEDOT:PSS and silicon surface passivation significantly reduced losses and enhanced Jsc.
  • Achieved a best Jsc of 19.2 mA/cm², with improved fill factor and efficiency compared to initial devices.

Conclusions:

  • Inkjet printing is a viable, low-cost method for fabricating high-performance IBC solar cells.
  • Material optimization and surface passivation are key to improving printed solar cell efficiency.
  • Further enhancements require anti-reflective coatings and improved metal contact inks.