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Related Concept Videos

Polymers02:34

Polymers

The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...
Polymers02:34

Polymers

The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...
Bioplastics01:27

Bioplastics

Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...

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Updated: May 11, 2026

Morphology Control for Fully Printable Organic&#8211;Inorganic Bulk-heterojunction Solar Cells Based on a Ti-alkoxide and Semiconducting Polymer
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"Twisted" Terpolymer Donor Enabling High-Performance Intrinsically Stretchable Organic Solar Cells.

Di Zhang1, Zhi Wang1, Junfeng Liu1

  • 1Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, 430074, P.R. China.

Angewandte Chemie (International Ed. in English)
|August 30, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed new ductile terpolymers for intrinsically stretchable organic solar cells (is-OSCs). These materials improve both power conversion efficiency (PCE) and mechanical robustness, enabling advanced wearable power generation.

Keywords:
Alkyl side chainIntrinsically stretchable organic solar cellMechanical stretchabilityTwisted terpolymer donor

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Polymer Chemistry

Background:

  • Intrinsically stretchable organic solar cells (is-OSCs) are promising for wearable power generation.
  • Current high-efficiency organic solar cells use rigid backbones, limiting stretchability and creating a performance-mechanical trade-off.

Purpose of the Study:

  • To develop ductile terpolymers that enhance both photovoltaic performance and mechanical robustness in is-OSCs.
  • To investigate the impact of incorporating 3-butyloctyl-thiophene (ThBO) units into PM6 backbones on material properties and device performance.

Main Methods:

  • Synthesized a series of PM-BOX% terpolymers with varying amounts of ThBO units (X = 5, 10, 20).
  • Incorporated ThBO units into the PM6 backbone to induce backbone twisting and increase disordered content.
  • Fabricated and characterized is-OSC devices using the developed terpolymers and a BTP-eC9 acceptor.

Main Results:

  • The PM-BO10%:BTP-eC9 devices achieved a power conversion efficiency (PCE) of 18.3% and a crack-onset strain of 23.8%.
  • The optimized terpolymer enhanced mechanical stretchability by increasing backbone twist and facilitating stress dissipation.
  • The PM-BO10%:BTP-eC9 is-OSCs demonstrated excellent PCE retention (80% at 31.0% strain), reaching 14.2% PCE under strain.

Conclusions:

  • The twisted terpolymer design strategy successfully improved both PCE and stretchability in is-OSCs.
  • This approach offers a novel pathway for creating efficient and robust polymer donors for next-generation wearable electronics.
  • The developed materials show significant potential for practical applications in flexible and stretchable power generation.