| 초록 |
Organic solar cells (OSCs) have been received attention for next generation photovoltaic device. However, the power conversion efficiency (PCE) of OSCs has been limited by energy loss caused by the difference between the optical band gap and its open circuit voltage (Voc). Extensive efforts to reduce energy loss and enhance Voc have been carried out via design and synthesis of novel donor or acceptor materials, morphology control and tandem architecture. However, they have the disadvantages of a complex manufacturing process. Ternary OSCs composed three photoactive materials have been demonstrated as a promising strategy to improve the PCE of OSCs. In this work, the high crystalline small molecule donor, DRCN5T, was chosen as a third component to fabricate ternary OSCs. By applying a minority amount of DRCN5T as a donor in binary OSCs, we demonstrated efficient ternary OSCs with improved crystallinity of polymer phase and reduced the energy loss. |
