“…And it is exciting that some successful models have been proposed to explain the formation process of crystalline silicon films: (1) surface diffusion model [8,9], (2) etching model [10] and (3) chemical annealing model [11]. Meanwhile, because of the light weight and flexibility demanded in modern solar cells and personal information displays, such as e-books, cellular phones, the preparation of high-quality crystalline silicon thin films on plastic has been attracting much attention the recent years [12][13][14][15]. And some approaches have been proposed to manufacture crystalline silicon on polymer substrates, such as laser annealing crystallization of amorphous silicon films [14,16] and the deposition of crystalline silicon films assisted with the appropriate substrate temperature, about 100 1C or more, in plasma chemical vapor deposition (CVD) processes [12,14,17,18].…”