The study of a high efficiency and uniformity solar concentrator for III-V solar cells

• Main Authors: Shang-Ping Yeh, 葉上平
• Other Authors: 張正陽, 伍茂仁
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/12662804120266906121

碩士 === 國立中央大學 === 光電科學研究所 === 95 === A high-efficiency and uniformity 100X solar concentrator is designed, fabricated and measured in this paper. This concentrator is adopted as refractive type of the Fresnel lens due to the larger angular tolerance than reflective type. This Fresnel lens is composed of several small micro prisms with pitch of 180 μm. Each micro prism has its own prism angle which can deflect the sun light to the corresponding place on the solar cell, resulting very high uniformity and high transmission efficiency more than 99 %. The diamond turning method is employed in the fabrication of this proposed concentrator with overall diameter of 10 cm. The corresponding measurement results show high uniformity and coincidence of the designed structure. In the final, we proposed a second optics for enlarging the angular tolerance to 2°.