Addition of Nanocrystals to Improve the Photo-Conversion Efficiency of Organic-Inorganic Halide Perovskite Solar Cells
| Autor: | Lin, Jou-Chun, 林柔均 |
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| Rok vydání: | 2015 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 103 Perovskite solar cells have been developed rapidly in recent years. Solution processable planar heterojunction perovskite solar cells are seen as a promising low-cost renewable energy technology. The most common device structure is FTO / TiO2 / CH3NH3PbI3-xClx / spiro-OMeTAD / Au. The main difficulties for this type of solar cells are the controls of coverage and morphology of perovskite CH3NH3PbI3-xClx film. In this study, a solution processable pyrite iron(II) sulfide nanocrystals (FeS2 NCs) act as additives. The FeS2 NCs mixed solution is added 5 vol% into the perovskite precursor solution to improve the film formation, the energy conversion efficiency reach 15.95%. Compared with the pristine CH3NH3PbI3-xClx device it has enhanced about 28%. We studied the new perovskite by various analyses, including XRD, Visible Absorption Spectroscopy, EQE, TRPL and SEM. The results showed that this iron(II) disulfide nanocrystals additive can improve the crystallinity of the perovskite film, making it more connective and directional. Therefore, the increased VOC and FF further enhanced the energy conversion efficiency of perovskite solar cells. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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