Precise Surface State Control of Carbon Quantum Dots to Enhance Charge Extraction for Solar Cells

Nanomaterials
Qiming YangPeizhi Yang

Abstract

Dye-sensitized solar cells are regarded as promising candidates to resolve the energy and environmental issues in recent years, arising from their solution-processable fabrication technology and high power conversion efficiency. However, there are still several problems regarding how to accelerate the development of this type of photovoltaics, including the limited light-harvesting ability and high-production cost of molecular dye. In the current work, we have systematically studied the role of nitrogen-doped carbon quantum dots (N-CQDs) as co-sensitizers in traditional dye sensitized solar cells. A series of N-CQDs have been prepared by employing chitosan as a precursor via one-pot hydrothermal technology for various times, demonstrating a maximized efficiency as high as 0.089% for an only N-CQDs-based device. Moreover, the co-sensitized solar cell based on N719 dye (C58H86N8O8RuS2) and optimized N-CQDs shows significantly enhanced performance, yielding a solar-to-electric conversion efficiency of up to 9.15% under one standard sun (AM 1.5G) irradiation, which is much higher than the 8.5%-efficiency of the controlled device without N-CQDs. The matched characteristics of energy level, excellent up-convention, and FRET (Förster ...Continue Reading

References

Jan 9, 2009·Journal of the American Chemical Society·Zhengtang LuoA T Charlie Johnson
Aug 6, 2010·Angewandte Chemie·Sheila N Baker, Gary A Baker
Jul 28, 2012·Chemical Communications : Chem Comm·Swagatika SahuSasmita Mohapatra
Sep 20, 2012·Chemical Society Reviews·Xiaobo ChenSamuel S Mao
Jan 28, 2014·Chemical Society Reviews·Reed M IzattBruce A Moyer
Jan 7, 2014·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Wei WangWenguang Liu

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Methods Mentioned

BETA
X-ray
FRET

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