| 초록 |
Semiconductors based on thienoisoindigo (TIIG) and three end-capping moieties (benzene (Bz), naphthalene (Np), and benzofuran (Bf)) have been synthesized and utilized for organic photovoltaics (OPVs). Incorporation of different end-capping blocks onto the TIIG core tuned optical properties and electronic structure (HOMO/LUMO energy levels), solid-state morphology and performance in OPVs. With the aim of exploring underlying structure–property relationships for these molecular systems, we have investigated morphological structures in both pristine small molecule and small molecule/PC71BM blend films using grazing incidence wide angle X-ray scattering (GIWAXS) and atomic force microscopy (AFM). In this study, a correlation between the molecular structure, thin film morphology, and photovoltaic properties of these conjugated small molecules was established and will provide molecular design of TIIG units. |
