Improve the Efficiency of Polymer Solar Cell by Doping Wide-Band-Gap Material

• Main Authors: Wei-MinChen, 陳暐旻
• Other Authors: Wei-Chou Hsu
• Format: Others
• Language: en_US
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/16904076444060345586

碩士 === 國立成功大學 === 微電子工程研究所碩博士班 === 100 === In this thesis, we fabricated the polymer solar cells with doped organic material in active layer to enhance power conversion efficiency of device significantly from 3.24% to 4.23%. At first, we found that it can effectively enhance light absorption ability of thin film doped with fluorescent C545T in active layer, but power conversion efficiency of device decreases with increasing doping concentration. According to the result of measurements, we believed that doping C545T in active layer will limit the carrier transport to lead a decrease in PCE of device. Therefore, we try to dope wide-band-gap material Ir(ppz)3 in active layer to improve carrier transport. The experimental results demonstrated doping Ir(ppz)3 can effectively enhance ability of hole transport to make carrier more balanced, and it does not affect crystallization and conjugation length of P3HT. We found that doping Ir(ppz)3 1mg in active layer can significantly enhance short circuit current density and thus improve power conversion efficiency of device. The optimum device has the short circuit current density (Jsc) of 11.8mA/cm2, open circuit voltage (Voc) of 0.61V, fill factor (FF) of 0.59, and power conversion efficiency (PCE) of 4.23%, respectively.