Fluorescent carbon quantum dots synthesized by chemical vapor deposition: An alternative candidate for electron acceptor in polymer solar cells
| Autor: | Lingpeng Yan, Chang-Qi Ma, Husheng Jia, Huimin Gu, Yongzhen Yang, Yong Kang Chen, Bo Cui, Xuguang Liu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Inorganic chemistry 02 engineering and technology Chemical vapor deposition 010402 general chemistry 01 natural sciences Polymer solar cell Inorganic Chemistry Graphite Electrical and Electronic Engineering Physical and Theoretical Chemistry Solubility HOMO/LUMO Spectroscopy chemistry.chemical_classification Organic Chemistry Doping Hybrid solar cell Electron acceptor 021001 nanoscience & nanotechnology Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry Chemical engineering 0210 nano-technology |
| Zdroj: | Optical Materials. 75:166-173 |
| ISSN: | 0925-3467 |
| Popis: | Excitation-wavelength-dependent blue-greenish fluorescent carbon quantum dots (CQDs) with graphite structure were synthesized by chemical vapor deposition (CVD) method. In comparison with those synthesized by hydrothermal method (named H-CQDs), C-CQDs have less hydrophilic terminal groups, showing good solubility in common organic solvents. Furthermore, these synthesized C-CQDs show a low LUMO energy level (LUMO = −3.84 eV), which is close to that of phenyl-C 61 -butyric acid methyl ester (PC 61 BM, LUMO = −4.01 eV), the most widely used electron acceptor in polymer solar cells. Photoluminescence quenching of the poly(3-hexylthiophene-2,5-diyl):C-CQDs blended film (P3HT:C-CQDs) indicated that a photo-induced charge transfer between P3HT and C-CQDs occurs in such a composite film. Bulk heterojunction solar cells using C-CQDs as electron acceptors or doping materials were fabricated and tested. High fill factors were achieved for these C-CQDs based polymer solar cells, demonstrating that CQDs synthesized by CVD could be alternative to the fullerene derivatives for applying in polymer solar cells. |
| Databáze: | OpenAIRE |
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