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Related Experiment Video

Updated: Jun 20, 2026

Morphology Control for Fully Printable Organic&#8211;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

A planar copolymer for high efficiency polymer solar cells.

Ruiping Qin1, Weiwei Li, Cuihong Li

  • 1Institute of Chemistry CAS, Beijing 100190, China, Department of Physics, Chemistry and Biology, Linköping University, Sweden.

Journal of the American Chemical Society
|October 1, 2009
PubMed
Summary

High-efficiency polymer solar cells were developed using a novel alternating copolymer, HXS-1. This donor material achieved a 5.4% power conversion efficiency (PCE) in bulk heterojunction devices.

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Photovoltaics

Background:

  • Developing efficient donor materials is crucial for advancing polymer solar cell (PSC) technology.
  • Organic semiconductors offer potential for low-cost, flexible, and large-area solar energy conversion.

Purpose of the Study:

  • To design and synthesize a novel alternating copolymer, HXS-1, for use as a donor material in high-efficiency polymer solar cells.
  • To investigate the performance of HXS-1 in bulk heterojunction (BHJ) solar cells.

Main Methods:

  • Synthesis of the alternating copolymer poly(2-(5-(5,6-bis(octyloxy)-4-(thiophen-2-yl)benzo[c][1,2,5]thiadiazol-7-yl)thiophen-2-yl)-9-octyl-9H-carbazole) (HXS-1).
  • Characterization of the polymer's solid-state packing using X-ray diffraction (XRD).
  • Fabrication and testing of BHJ solar cells using HXS-1 as the donor material paired with PC71BM acceptor, spin-coated from a specific solvent mixture.

Main Results:

  • The synthesized polymer, HXS-1, exhibited close packing of polymer chains in the solid state, as confirmed by XRD.
  • BHJ solar cells fabricated with HXS-1 achieved a short-circuit current density (Jsc) of 9.6 mA/cm(2), an open-circuit voltage (Voc) of 0.81 V, and a fill factor (FF) of 0.69.
  • The power conversion efficiency (PCE) reached 5.4% under standard AM 1.5 G irradiation.

Conclusions:

  • The novel alternating copolymer HXS-1 is a promising donor material for high-efficiency polymer solar cells.
  • The specific molecular design and processing conditions contribute to the observed device performance.
  • Further optimization could lead to even higher efficiencies in organic photovoltaic devices.