| 초록 |
Photocurrent generation of organic solar cell is determined by a number of sequential process: (1) light absorption and the generation of exciton, (2) exciton separation to free charge carriers at the donor/acceptor interface and (3) transport of separated charges to the electrodes. Among them, the primary process in organic solar cell is the generation of excitons after absorption of light. Due to their low dielectric constant (typically ranges from 2-4), organic materials generate strongly bound Frenkel-type exciton rather than free charge carriers. High efficient solar cell requires separation of electron-hole pair into free charge carriers with a high quantum yield and minimal loss of free energy. In this study, many methods will be used to investigate the charge photogeneration in organioc donor/acceptor blends according to the acceptor materials. |
