| Summary: | 碩士 === 國立臺灣大學 === 光電工程學研究所 === 99 === The Fraunhofer Institute for Solar Energy Systems released the 41.4% high efficiency solar cell in 2009. Comparing to the about 25% theoretical efficiency of silicon based solar cell, this structure not only has high efficiency but also has plenty of room to be improved with further research. However, this kind of solar cell is extremely expensive. If it’s simply put under the sunshine to transfer light to electricity, its high cost might not be returned by the expense of generated electricity. Generally, high efficiency solar cell would be cut to small pieces and accompanied by concentrated lens that is concentration photovoltaic (CPV). This thesis designs three different types of concentrated system. In chapter three, the system using backlight module concept has light and thin characteristics. In chapter four, tapered rectangular pipe is placed beneath the lens which keeps the optical efficiency high at big tilt angle of incident light. In chapter five, the small lens array focus light to the small structures first, and then these structures change the angle of light in order to make it propagate to solar cell. With linearly movable device, this design both has thin and light features, and high acceptance angle.
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