Efficiency Enhancement of Silicon Heterojunction Solar Cells via Photon Management Using Graphene Quantum Dot as Downconverters
| Autor: | Tzu Chiao Wei, Lih-Juann Chen, Meng-Lin Tsai, Wei Chen Tu, Shu Ping Lau, Libin Tang, Jr-Hau He, Wan Rou Wei |
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| Rok vydání: | 2015 |
| Předmět: |
Materials science
Organic solar cell business.industry Mechanical Engineering Bioengineering 02 engineering and technology General Chemistry Photovoltaic effect Hybrid solar cell Quantum dot solar cell 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Graphene quantum dot Polymer solar cell 0104 chemical sciences Multiple exciton generation Quantum dot Optoelectronics General Materials Science 0210 nano-technology business |
| Zdroj: | Nano Letters. 16:309-313 |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/acs.nanolett.5b03814 |
| Popis: | By employing graphene quantum dots (GQDs), we have achieved a high efficiency of 16.55% in n-type Si heterojunction solar cells. The efficiency enhancement is based on the photon downconversion phenomenon of GQDs to make more photons absorbed in the depletion region for effective carrier separation, leading to the enhanced photovoltaic effect. The short circuit current and the fill factor are increased from 35.31 to 37.47 mA/cm(2) and 70.29% to 72.51%, respectively. The work demonstrated here holds the promise for incorporating graphene-based materials in commercially available solar devices for developing ultrahigh efficiency photovoltaic cells in the future. |
| Databáze: | OpenAIRE |
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