Simulation optimization of energy bandgaps for CIGS solar cells

• Main Authors: Jun-Jie Wang, 王俊傑
• Other Authors: Kuo-Feng Chen
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/am7m8u

碩士 === 國立高雄應用科技大學 === 光電與通訊工程研究所 === 101 === In this thesis, we successfully completed the simulation of V-shaped and Multi-slope band gap structures with the AMPS-1D numerical simulation software, and we obtained the higher efficiencies than other previous studys. According to the significant influence of the front grading on solar cells' open voltage and the correlation between the back grading and the back carrier recombination, we first began the optimization of the energy gap’s engineering from the front and back grading individually. Subsequently, we combined the best conditions of the front and back grading to form a spoon-shaped structure, and then obtained the efficiency of 19.28%. For the unoptimized V-shaped structure in the literature, we optimized its turning point's band gap and position on the CIGS bulk part, and obtained the efficiency of 19.95%. Consequently, the V-shaped structure was evolved into the multi-slope structure having the efficiency of 20.285%, which is 1% higher than that of the spoon-shaped structure. The proposed band gap structures provide researchers a process direction on the energy gap engineering.