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A pyridine-functionalized pyrazolinofullerene used as a buffer layer in polymer solar cells
Pingao Yang1, Shan Chen, Yu Liu
1Key Lab of Environment-Friendly Chemistry and Applications of the Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, China. liuyu03b@126.com.
Physical Chemistry Chemical Physics : PCCP
|September 17, 2013
Summary
A novel pyridine-functionalized fullerene derivative was synthesized and used to modify zinc oxide in polymer solar cells. This modification enhanced the power conversion efficiency of inverted polymer solar cells.
Area of Science:
- Organic Chemistry
- Materials Science
- Photovoltaics
Background:
- Fullerene derivatives are crucial in organic electronics.
- Zinc oxide is a common electron transport layer in solar cells.
- Interface engineering is key to improving solar cell performance.
Purpose of the Study:
- To synthesize a pyridine-functionalized pyrazolinofullerene.
- To investigate its application as a buffer layer in inverted polymer solar cells.
- To evaluate the impact on device performance.
Main Methods:
- One-pot synthesis of fullerene derivative (1) from C60, 3,6-di(2-pyridyl)-1,2,4,5-tetrazine, and water.
- Structural characterization using X-ray diffraction.
- Fabrication and testing of inverted polymer solar cells with ZnO modification.
Main Results:
- Compound 1 synthesized in 42% yield.
- Structure confirmed by single-crystal X-ray diffraction.
- Power conversion efficiency (PCE) increased from 3.65% to 4.18% in P3HT:PC61BM inverted solar cells.
Conclusions:
- Pyridine-functionalized pyrazolinofullerene (1) is a viable buffer layer material.
- Modification of ZnO with compound 1 improves inverted polymer solar cell performance.
- Coordination capability of functional groups enhances device efficiency.
