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Related Experiment Video

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The first thieno[3,4-b]pyrazine based small molecular acceptor with a linear A

Jianfeng Li1, Jing Yang, Junyi Hu

  • 1CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, P. R. China. zhouej@nanoctr.cn.

Chemical Communications (Cambridge, England)
|September 11, 2018
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Summary

Researchers synthesized TP21, a novel thieno[3,4-b]pyrazine (TP) non-fullerene acceptor. Organic solar cells using TP21 achieved a 5.81% power conversion efficiency and a high open-circuit voltage of 1.05 V.

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Area of Science:

  • Materials Science
  • Organic Electronics
  • Photovoltaics

Background:

  • Non-fullerene acceptors are crucial for advancing organic solar cell performance.
  • Thieno[3,4-b]pyrazine (TP) derivatives offer potential for novel acceptor development.

Purpose of the Study:

  • To synthesize and characterize the first thieno[3,4-b]pyrazine (TP) based non-fullerene acceptor, named TP21.
  • To evaluate the performance of organic solar cells (OSCs) incorporating TP21.

Main Methods:

  • Chemical synthesis of the TP21 non-fullerene acceptor.
  • Fabrication and characterization of organic solar cells using a J61:TP21 blend.
  • Measurement of device performance metrics including power conversion efficiency (PCE) and open-circuit voltage (Voc).

Main Results:

  • TP21 was successfully synthesized, exhibiting a narrow band gap of 1.65 eV and a high-lying LUMO level of -3.61 eV.
  • Organic solar cells (OSCs) fabricated with J61:TP21 achieved a power conversion efficiency (PCE) of 5.81%.
  • The devices demonstrated a high open-circuit voltage (Voc) of 1.05 V, indicating efficient charge separation.

Conclusions:

  • TP21 represents a promising new class of non-fullerene acceptors for organic solar cells.
  • The electronic properties of TP21 contribute to high open-circuit voltage in OSCs.
  • Further optimization of TP21-based OSCs could lead to enhanced power conversion efficiencies.