**2.1 Background of the study**

Since 1960's the use of the energy becomes as a necessary part of life. The concept of solar cells takes a place on 1970 when researchers looking for another kind of energy sources which is clean and environment friendly. Many countries use this technology until this moment, but the solar cells produce low amount of energy that makes it use as narrow as seen. The researchers made many research on this field to increase the production of energy from the solar cells, one of these researches is to enhance the silicon capability by using the material science and technologies [4].
