Deformation Measurement of the Flexible Substrates of Solar Cells

• Main Authors: Wen-Pin Juan, 阮文斌
• Other Authors: Jiong-Shiun Hsu
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/7hbmnx

碩士 === 國立虎尾科技大學 === 動力機械工程系機械與機電工程碩士班 === 105 === With the evolution of science and global countries’ beginning to emphasize on developing green energy, solar cells have been developed toward low cost, flexibility, infrangibility, thinness, and light weight, with each functional film formed on flexible substrates. Despite the above advantages, with different mechanical properties among layers, flexible solar structure is vulnerable to deformation, which may further influence its efficiency and service life. Thus the investigation of substrate deformation would be a rather important issue for developing flexible solar cells. The substrate material used in this study is Polyimide (PI), whose crystal structure is similar to its uniaxial crystal counterpart, which was thus defined as the material structure of PI. Taking advantage of the natural birefringence properties of the material itself, we conducted theoretical derivation using the optical deflection technique to obtain the phase difference of two reflected beams in the film material, where the PI was pasted on an arc-shaped model with a known radius of curvature that was placed in the optical deflection measurement system. Together with the phase shift technique, it was employed to obtain the complete phase distribution diagrams to verify the accuracy of the system frame. Finally the fitting method was used to obtain the radius of curvature to verify the feasibility of the measurement technique proposed in this study.