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Published on: March 2, 2021
Indacenodithiophene-based small-molecule donor with strong crystallinity for efficient organic solar cells
Yan Zheng1, Sunan Bao1, Hang Yang1
1Laboratory of Advanced Optoelectronic Materials, Suzhou Key Laboratory of Novel Semiconductor-Optoelectronics Materials and Devices, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China. cuichaohua@sua.edu.cn.
Researchers designed two indacenodithiophene (IDT)-based small molecules for organic solar cells. The crystalline IDBT material significantly improved photovoltaic performance compared to amorphous IDBT-Cl when paired with a Y6 acceptor.
Area of Science:
- Materials Science
- Organic Electronics
- Photovoltaics
Background:
- Indacenodithiophene (IDT)-based small molecules are promising for organic solar cells.
- Tuning molecular structure and solid-state packing is crucial for optimizing donor material performance.
Purpose of the Study:
- To design and synthesize two novel IDT-based small-molecule analogues, IDBT and IDBT-Cl.
- To investigate the impact of molecular structure and crystallinity on the photovoltaic performance of these materials in organic solar cells.
Main Methods:
- Synthesis of IDBT and IDBT-Cl small molecules.
- Fabrication of organic solar cells using IDBT and IDBT-Cl as donor materials blended with a Y6 acceptor.
- Characterization of material properties and device performance.
Main Results:
- IDBT, exhibiting strong crystallinity, demonstrated superior photovoltaic performance compared to the amorphous IDBT-Cl.
- The blend of IDBT with the Y6 acceptor achieved higher power conversion efficiencies.
Conclusions:
- IDT-based small molecules hold significant potential for developing efficient donor materials in organic solar cells.
- Molecular design strategies that promote crystallinity are effective for enhancing device performance.
