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Ziegler–Natta polymerization is another form of addition or chain‐growth polymerization used for synthesizing linear polymers over branched polymers. The catalyst used for polymerization is the Ziegler–Natta catalyst, named after Karl Ziegler and Giulio Natta, who developed it in 1953. This catalyst is an organometallic complex of titanium tetrachloride and triethyl aluminum, with the active form of the catalyst being an alkyl titanium compound. Using the Ziegler–Natta...
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Related Experiment Video

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Ternary Polymer Solar Cells Facilitating Improved Efficiency and Stability.

Yingying Dong1, Yan Zou1, Jianyu Yuan2

  • 1Laboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China.

Advanced Materials (Deerfield Beach, Fla.)
|November 14, 2019
PubMed
Summary
This summary is machine-generated.

Adding a third component, a small molecule named IBC-F, significantly boosted polymer solar cell (PSC) efficiency and stability. Ternary devices achieved a 15.06% power conversion efficiency (PCE), surpassing binary devices.

Keywords:
fill factorpower conversion efficiencystabilityternary polymer solar cells

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Photovoltaics

Background:

  • Polymer solar cells (PSCs) offer a low-cost alternative to silicon photovoltaics.
  • Enhancing power conversion efficiency (PCE) and operational stability in PSCs remains a key challenge.
  • Ternary strategies, incorporating a third component into the active layer, show promise for performance improvements.

Purpose of the Study:

  • To investigate the impact of a new small molecule, IBC-F, as a third component in PSCs.
  • To enhance the PCE and stability of polymer solar cells through ternary blend optimization.
  • To understand the underlying mechanisms responsible for performance improvements in ternary PSCs.

Main Methods:

  • Fabrication and characterization of binary (PBDB-T:IE4F-S) and ternary (PBDB-T:IE4F-S:IBC-F) polymer solar cells.
  • Optimization of the IBC-F content in the ternary active layer.
  • Performance evaluation through current density-voltage (J-V) measurements and stability testing.

Main Results:

  • A ternary PSC with 20% IBC-F achieved a remarkable PCE of 15.06%, a significant increase from the binary device's 13.70%.
  • The performance enhancement was attributed to improved fill factor, charge dissociation and extraction, reduced recombination, longer carrier lifetime, and favorable molecular orientation.
  • The ternary device exhibited superior thermal and photoinduced stability compared to the control binary device.

Conclusions:

  • The small molecule IBC-F effectively enhances the performance of ternary polymer solar cells.
  • Ternary blends offer a viable strategy for developing high-efficiency and stable PSCs.
  • This research provides insights into designing novel third components for advanced photovoltaic applications.