太阳能电池原理与应用.ppt

1、Solar Cell Principles and application,第讲座研究室 岳丹丹 日期 2010.11.14,What are solar cells?,Photovoltaics (PV) is the science of direct conversion of light to D.C. electricity, based on the fundamental principle of “photovoltaic effect”. This phenomenon is exhibited in semiconductor materials.,How do solar

2、 cells work?,PV effect holes electrons,How do solar cells work?,N-type and P-type,P-N junction generation,A silicon atom has 4 relatively weakly bound electrons P-type doping, the creation of excess holes, is achieved by the incorporation into the silicon of atoms with 3 valence electrons, most ofte

3、n boron N-type doping, the creation of extra electrons is achieved by incorporating an atom with 5 valence electrons, most often phosphorus,Solar cell production process,Types of silicon used for making solar cells,9,Crystalline silicon solar cells: mono crystalline silicon (c-Si) and multicrystalli

4、ne silicon (mc-Si) Surface barrier solar cells (a-Si on c-Si) Passivated Interface (PI) at hetero junction Thin film solar cells: amorphous silicon (a-Si) polycrystalline copper indium diselenide (CIS) or copper-indium-gallium - selenide / sulphide (CIGS) cadmium telluride (CdTe) thin-film crystalline silicon Gallium arsenide (GaAs) and multi junction cells (GaInP / GaAs / Ge ) with super-high efficiency Nano crystalline Dye-sensitized TiO2 based and other nano-structured solar cells Organic (Polymer) solar cells,Types of solar cells based on choice of semiconductor