| 초록 |
Short circuit current density of organic solar cells, which is one of the most important parameters to achieve high energy conversion efficiency,is largely affected by light absorption property of active materials and charge mobility of active layers. Thus in order to increase the conversion efficiency of organic solar cells, p-type materials should be developed such that their absorption ranges are wide enough along with high molar absorptivity. Naphthalene has an electron-donating property with good hole mobility. Diketopyrrolopyrrole (DPP) has an electron-accepting property with lactam structure, and exhibits strong π-π interactions. In this study, a naphthalene-DPP copolymer was successfully synthesized. The optical band gap of the polymer was 1.61 eV. The HOMO and LUMO levels were -5.5 eV and -3.95 eV, respectively. The performance of the polymer-based solar cells will be presented in detail. |
