| 초록 |
Organic solar cells (OSCs) have attracted much attention as their applicability for flexible and large-area device with the cheap processing cost. Recently, bulk-heterojunction (BHJ) OSCs have achieved in the excellent power conversion efficiencies over 13-14%. However, the nano-morphology of BHJ device can be changed too easily upon their fabrication conditions such as temperature, blend ratio and post-treatment, which is directly related to the stability of the OSCs. As a novel strategy for stabilizing the morphology of the OSCs, single-component(SC) molecules can be adopted, which the donor and acceptor moieties are integrated by a covalent linkage. In this study, we designed and synthesized the new C60-based triad SC photoactive materials by modulating the length of covalent linkage to optimize the morphology and charge transfer characteristics. The synthesis of new acceptors, optical, morphological, electrical and photovoltaic properties will be presented in detail. |
