| 초록 |
The use of fossil fuels to obtain electricity is a major cause of global warming and environmental change. Many countries already have plans to reduce fossil fuels and increase the use of renewable energy. One of the most commonly used renewable energy sources is solar. The use of solar cells to convert sunlight into electricity is widespread worldwide. In general, solar cells can be divided into crystalline silicon and thin-film cells. Crystalline silicon cells have been generally used for about 20 years more than thin-film cells. However, the demand for amorphous thin-film cells, which can save costs due to low embodied energy, is increasing. In addition, amorphous thin film cells are light, flexible and vandal resistant, making them particularly suitable for use in buildings.In this experiment, the crystallinity of amorphous silicon was controlled to improve the mobility of amorphous silicon used in amorphous thin film cells, and then electrical properties were measured. In order to improve the crystallinity of amorphous silicon, NaCl was epitaxially grown on Si by thermal deposition and Si was deposited in-situ by E-Beam. In order to make the Si thin film, Si was transferred to DI water by using the water soluble property of NaCl without using photoresist which is mainly used as a sacrificial layer. TEM was used to confirm the crystallinity of the transferred Si film. In order to measure the electrical properties of the Si film, an Ag electrode was formed using an E-beam, and electrical characteristics were measured through a Hall measurement. |
