Photovoltaic device with back reflector

The invention provides a photovoltaic device with a back reflector. A device and method of improving efficiency of a thin film solar cell by providing a back reflector between a back electrode layer and an absorber layer are disclosed. Back ref sunlight photons back into the absorber layer to generate additional electrical energy. The device is a photovoltaic device comprising a substrate, a backelectrode layer, a back reflector, an absorber layer, a buffer layer, and a front contact layer. The back reflector is formed as a plurality of parallel lines. 本发明提供了具有背面反射体的光伏器件，公开了通过在背面电极层和吸收层之间提供背面反射体而提高薄膜太阳能电池的效率的器件和方法。背面反射体将太阳光光子重新反射回吸收层以产生额外的电能。该器件是光伏器件，其包括衬底、背面电极层、背面反射体、吸收层、缓冲层和正面接触层。背面反射体形成为多条平行线。