| 초록 |
Organic solar cells have been extensively studied for renewable energy applications due to their supreme advantages. To date, the power conversion efficiency (PCE) of polymer:fullerene solar cells that have an exclusive feature with outstanding electron transport characteristics (fullerene) and interpenetrating phase segregation morphology, has reached ~10%. However, the PCE of all-polymer solar cells is still inferior to that of polymer:fullerene solar cells. The reason for the low PCE of all-polymer solar cells can be attributed to relatively low electron mobility of electron-accepting polymers and high charge-blocking resistances by the formation of intimate morphology. In this work, we tried further improvement in the performance of all-polymer solar cells by chemical doping of both electron-donating polymer chains and electron-accepting polymer chains. The details behind the improved performances will be discussed along with optical and nanostructure characterizations. |
