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Published on: June 18, 2013
Organic single-crystalline p-n junction nanoribbons
Yajie Zhang1, Huanli Dong, Qingxin Tang
1Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Journal of the American Chemical Society
|August 5, 2010
Summary
Researchers created organic single-crystalline p-n junction nanoribbons for nanoelectronics. These nanoribbons show promising charge transport and photovoltaic properties for future devices.
Area of Science:
- Organic electronics
- Nanotechnology
- Materials science
Background:
- Organic nanoelectronics demand high-performance nanometer-sized p-n junctions.
- Fabrication of such junctions is crucial for integrated circuits.
Purpose of the Study:
- To demonstrate the formation of single-crystalline p-n junction nanoribbons using organic semiconductors.
- To investigate their growth and transport properties.
Main Methods:
- Selective crystallization of copper hexadecafluorophthalocyanine (F(16)CuPc, n-type) on copper phthalocyanine (CuPc, p-type) single-crystalline nanoribbons.
- Analysis of crystallization parameters including molecular structure, lattice constants, and pi-stacking.
- Fabrication of field-effect transistors and photovoltaic devices.
Main Results:
- Successfully formed single-crystalline p-n junction nanoribbons.
- Observed ambipolar transport with balanced carrier mobilities (0.05 cm(2) V(-1) s(-1) for F(16)CuPc and 0.07 cm(2) V(-1) s(-1) for CuPc).
- Demonstrated current rectification in a basic photovoltaic device under simulated sunlight.
Conclusions:
- Discrete p-n junction nanoribbons are achievable through controlled selective crystallization.
- These nanoribbons serve as ideal systems for studying organic-organic interface charge transport and photovoltaic behavior.
- The findings pave the way for advanced organic nanoelectronic devices.
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