Amorphous silicon has enabled a new technology for large-area electronics, with major applications in liquid crystal displays, image sensing and solar power conversion. This book presents a broad description of the current technology and its future potential, so that the reader can understand how the particular properties of amorphous silicon lead to unique applications. Topics covered include the design of the amorphous silicon transistor and sensor devices, the range of matrix-addressed arrays and other systems that can be fabricated, and the performance of the various application areas.