The Suns light rays continuously strike the Earth's surface and could provide ten times the amount of electricity society consumes. This represents an untapped natural resource that is only now being harvested. Photovoltaics (solar cell) is the field that strives to develop this energy resource. Typical polysilicon (multi-crystalline) solar modules have efficiencies around 14%. To improve efficiencies and reduce costs the exploration of new structures has been undertaken. High efficiency photovoltaic devices can be produced using a novel all silicon heterostructure. This book attempts to...