| 초록 |
Solar cells are in the spotlight as one of the eco-friendly energy sources. However, efficiency is still a problem for solar cells to be commercialized, so we used a D-A shift structure where new high efficiency can control energy levels to develop structures. Difluorinated phenazine(DFPz) composed of butyl octyl alkyl chain as an accepter was used, and efficiency was compared using BDT and BDTT as a donor. As a result, BDTT-DFPz was found to obtain increased Voc due to lower HOMO than BDT-DFPz, and FF was also improved, showing that BDTT-DFPz was better at PCE. This was assumed to have expanded π conjugated structure due to the added thiophene, which may have improved the charge mobility. As a result, it was found that BDTT-DFPz showed 5.28% PCE to show better efficiency, whereas BDT-DFPz showed 4.24% PCE. |
