Improvement in performance of Si-based thin film solar cells with a nanocrystalline SiO2–TiO2 layer
| Autor: | Dong-Sing Wuu, Chung-Yuan Kung, Yang-Shih Lin, Yu-Xuan Huang, Shui-Yang Lien |
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| Rok vydání: | 2014 |
| Předmět: |
Amorphous silicon
Materials science business.industry Silicon dioxide Metals and Alloys Nanocrystalline silicon Surfaces and Interfaces Polymer solar cell Nanocrystalline material Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound Optics chemistry Chemical engineering law Solar cell Titanium dioxide Materials Chemistry Transmittance business |
| Zdroj: | Thin Solid Films. 570:200-203 |
| ISSN: | 0040-6090 |
| Popis: | In this paper, titanium dioxide (TiO 2 ) solution with grain sizes of 1–5 nm is prepared by microwave hydrothermal synthesis, and then mixed with silicon dioxide (SiO 2 ) solution to yield different SiO 2 /TiO 2 ratios. The mixed solution is then sol–gel spin-coated on glass as an anti-reflecting and self-cleaning bi-functional layer. The experimental results show that the transmittance is optimized not only by minimizing the reflectance by reflective index matching at the glass/air interface, but also by improving the film/glass interface adhesion. Adding SiO 2 into TiO 2 in a weight ratio of 5 leads to the highest average transmittance of 93.6% which is 3% higher than that of glass. All of the SiO 2 –TiO 2 films exhibit a remarkable inherent hydrophilicity even when not illuminated by ultra-violet light. Using the optimized SiO 2 –TiO 2 film in a hydrogenated amorphous silicon/microcrystalline silicon tandem, solar cell increases its conversion efficiency by 5.2%. Two months of outdoor testing revealed that cells with the SiO 2 –TiO 2 film avoid 1.7% of the degradation loss that is caused by dust and dirt in the environment. |
| Databáze: | OpenAIRE |
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